Ticket #43316: 43316.19.diff

src/wp-includes/rest-api.php

@@ -193 +193 @@
                         $revisions_controller = new WP_REST_Revisions_Controller( $post_type->name );
                         $revisions_controller->register_routes();
                 }
+
+                if ( 'attachment' !== $post_type->name ) {
+                        $autosaves_controller = new WP_REST_Autosaves_Controller( $post_type->name );
+                        $autosaves_controller->register_routes();
+                }
+
         }
 
         // Post types.

new file src/wp-includes/rest-api/endpoints/class-wp-rest-autosaves-controller.php

@@ +1 @@
+<?php
+/**
+ * REST API: WP_REST_Autosaves_Controller class.
+ *
+ * @package WordPress
+ * @subpackage REST_API
+ * @since 5.0.0
+ */
+
+/**
+ * Core class used to access autosaves via the REST API.
+ *
+ * @since 5.0.0
+ *
+ * @see WP_REST_Controller
+ */
+class WP_REST_Autosaves_Controller extends WP_REST_Revisions_Controller {
+
+        /**
+         * Parent post type.
+         *
+         * @since 5.0.0
+         * @var string
+         */
+        private $parent_post_type;
+
+        /**
+         * Parent post controller.
+         *
+         * @since 5.0.0
+         * @var WP_REST_Controller
+         */
+        private $parent_controller;
+
+        /**
+         * Revision controller.
+         *
+         * @since 5.0.0
+         * @var WP_REST_Controller
+         */
+        private $revisions_controller;
+
+        /**
+         * The base of the parent controller's route.
+         *
+         * @since 5.0.0
+         * @var string
+         */
+        private $parent_base;
+
+        /**
+         * Constructor.
+         *
+         * @since 5.0.0
+         *
+         * @param string $parent_post_type Post type of the parent.
+         */
+        public function __construct( $parent_post_type ) {
+                $this->parent_post_type = $parent_post_type;
+                $post_type_object       = get_post_type_object( $parent_post_type );
+
+                // Ensure that post type-specific controller logic is available.
+                $parent_controller_class = ! empty( $post_type_object->rest_controller_class ) ? $post_type_object->rest_controller_class : 'WP_REST_Posts_Controller';
+
+                $this->parent_controller    = new $parent_controller_class( $post_type_object->name );
+                $this->revisions_controller = new WP_REST_Revisions_Controller( $parent_post_type );
+                $this->rest_namespace       = 'wp/v2';
+                $this->rest_base            = 'autosaves';
+                $this->parent_base          = ! empty( $post_type_object->rest_base ) ? $post_type_object->rest_base : $post_type_object->name;
+        }
+
+        /**
+         * Registers routes for autosaves.
+         *
+         * @since 5.0.0
+         *
+         * @see register_rest_route()
+         */
+        public function register_routes() {
+                register_rest_route(
+                        $this->rest_namespace,
+                        '/' . $this->parent_base . '/(?P<parent>[\d]+)/' . $this->rest_base,
+                        array(
+                                'args'   => array(
+                                        'parent' => array(
+                                                'description' => __( 'The ID for the parent of the object.', 'gutenberg' ),
+                                                'type'        => 'integer',
+                                        ),
+                                ),
+                                array(
+                                        'methods'             => WP_REST_Server::READABLE,
+                                        'callback'            => array( $this, 'get_items' ),
+                                        'permission_callback' => array( $this->revisions_controller, 'get_items_permissions_check' ),
+                                        'args'                => $this->get_collection_params(),
+                                ),
+                                array(
+                                        'methods'             => WP_REST_Server::CREATABLE,
+                                        'callback'            => array( $this, 'create_item' ),
+                                        'permission_callback' => array( $this, 'create_item_permissions_check' ),
+                                        'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::CREATABLE ),
+                                ),
+                                'schema' => array( $this, 'get_public_item_schema' ),
+                        )
+                );
+
+                register_rest_route(
+                        $this->rest_namespace,
+                        '/' . $this->parent_base . '/(?P<parent>[\d]+)/' . $this->rest_base . '/(?P<id>[\d]+)',
+                        array(
+                                'args'   => array(
+                                        'parent' => array(
+                                                'description' => __( 'The ID for the parent of the object.', 'gutenberg' ),
+                                                'type'        => 'integer',
+                                        ),
+                                        'id'     => array(
+                                                'description' => __( 'The ID for the object.', 'gutenberg' ),
+                                                'type'        => 'integer',
+                                        ),
+                                ),
+                                array(
+                                        'methods'             => WP_REST_Server::READABLE,
+                                        'callback'            => array( $this, 'get_item' ),
+                                        'permission_callback' => array( $this->revisions_controller, 'get_item_permissions_check' ),
+                                        'args'                => array(
+                                                'context' => $this->get_context_param( array( 'default' => 'view' ) ),
+                                        ),
+                                ),
+                                'schema' => array( $this, 'get_public_item_schema' ),
+                        )
+                );
+
+        }
+
+        /**
+         * Get the parent post.
+         *
+         * @since 5.0.0
+         *
+         * @param int $parent_id Supplied ID.
+         * @return WP_Post|WP_Error Post object if ID is valid, WP_Error otherwise.
+         */
+        protected function get_parent( $parent_id ) {
+                return $this->revisions_controller->get_parent( $parent_id );
+        }
+
+        /**
+         * Checks if a given request has access to create an autosave revision.
+         *
+         * Autosave revisions inherit permissions from the parent post,
+         * check if the current user has permission to edit the post.
+         *
+         * @since 5.0.0
+         *
+         * @param WP_REST_Request $request Full details about the request.
+         * @return true|WP_Error True if the request has access to create the item, WP_Error object otherwise.
+         */
+        public function create_item_permissions_check( $request ) {
+                $id = $request->get_param( 'id' );
+                if ( empty( $id ) ) {
+                        return new WP_Error( 'rest_post_invalid_id', __( 'Invalid item ID.', 'gutenberg' ), array( 'status' => 404 ) );
+                }
+
+                return $this->parent_controller->update_item_permissions_check( $request );
+        }
+
+        /**
+         * Creates, updates or deletes an autosave revision.
+         *
+         * @since 5.0.0
+         *
+         * @param WP_REST_Request $request Full details about the request.
+         * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+         */
+        public function create_item( $request ) {
+
+                if ( ! defined( 'DOING_AUTOSAVE' ) ) {
+                        define( 'DOING_AUTOSAVE', true );
+                }
+
+                $post = get_post( $request->get_param( 'id' ) );
+
+                if ( is_wp_error( $post ) ) {
+                        return $post;
+                }
+
+                $prepared_post     = $this->parent_controller->prepare_item_for_database( $request );
+                $prepared_post->ID = $post->ID;
+                $user_id           = get_current_user_id();
+
+                if ( ( 'draft' === $post->post_status || 'auto-draft' === $post->post_status ) && $post->post_author == $user_id ) {
+                        // Draft posts for the same author: autosaving updates the post and does not create a revision.
+                        // Convert the post object to an array and add slashes, wp_update_post expects escaped array.
+                        $autosave_id = wp_update_post( wp_slash( (array) $prepared_post ), true );
+                } else {
+                        // Non-draft posts: create or update the post autosave.
+                        $autosave_id = $this->create_post_autosave( (array) $prepared_post );
+                }
+
+                if ( is_wp_error( $autosave_id ) ) {
+                        return $autosave_id;
+                }
+
+                $autosave = get_post( $autosave_id );
+                $request->set_param( 'context', 'edit' );
+
+                $response = $this->prepare_item_for_response( $autosave, $request );
+                $response = rest_ensure_response( $response );
+
+                return $response;
+        }
+
+        /**
+         * Get the autosave, if the ID is valid.
+         *
+         * @since 5.0.0
+         *
+         * @param WP_REST_Request $request Full data about the request.
+         * @return WP_Post|WP_Error Revision post object if ID is valid, WP_Error otherwise.
+         */
+        public function get_item( $request ) {
+                $parent_id = (int) $request->get_param( 'parent' );
+
+                if ( $parent_id <= 0 ) {
+                        return new WP_Error( 'rest_post_invalid_id', __( 'Invalid parent post ID.', 'gutenberg' ), array( 'status' => 404 ) );
+                }
+
+                $autosave = wp_get_post_autosave( $parent_id );
+
+                if ( ! $autosave ) {
+                        return new WP_Error( 'rest_post_no_autosave', __( 'There is no autosave revision for this post.', 'gutenberg' ), array( 'status' => 404 ) );
+                }
+
+                $response = $this->prepare_item_for_response( $autosave, $request );
+                return $response;
+        }
+
+        /**
+         * Gets a collection of autosaves using wp_get_post_autosave.
+         *
+         * Contains the user's autosave, for empty if it doesn't exist.
+         *
+         * @since 5.0.0
+         *
+         * @param WP_REST_Request $request Full data about the request.
+         * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+         */
+        public function get_items( $request ) {
+                $parent = $this->get_parent( $request->get_param( 'parent' ) );
+                if ( is_wp_error( $parent ) ) {
+                        return $parent;
+                }
+
+                $response  = array();
+                $parent_id = $parent->ID;
+                $revisions = wp_get_post_revisions( $parent_id, array( 'check_enabled' => false ) );
+
+                foreach ( $revisions as $revision ) {
+                        if ( false !== strpos( $revision->post_name, "{$parent_id}-autosave" ) ) {
+                                $data       = $this->prepare_item_for_response( $revision, $request );
+                                $response[] = $this->prepare_response_for_collection( $data );
+                        }
+                }
+
+                return rest_ensure_response( $response );
+        }
+
+
+        /**
+         * Retrieves the autosave's schema, conforming to JSON Schema.
+         *
+         * @since 5.0.0
+         *
+         * @return array Item schema data.
+         */
+        public function get_item_schema() {
+                $schema = $this->revisions_controller->get_item_schema();
+
+                $schema['properties']['preview_link'] = array(
+                        'description' => __( 'Preview link for the post.', 'gutenberg' ),
+                        'type'        => 'string',
+                        'format'      => 'uri',
+                        'context'     => array( 'edit' ),
+                        'readonly'    => true,
+                );
+
+                return $schema;
+        }
+
+        /**
+         * Creates autosave for the specified post.
+         *
+         * From wp-admin/post.php.
+         *
+         * @since 5.0.0
+         *
+         * @param mixed $post_data Associative array containing the post data.
+         * @return mixed The autosave revision ID or WP_Error.
+         */
+        public function create_post_autosave( $post_data ) {
+
+                $post_id = (int) $post_data['ID'];
+                $post    = get_post( $post_id );
+
+                if ( is_wp_error( $post ) ) {
+                        return $post;
+                }
+
+                $user_id = get_current_user_id();
+
+                // Store one autosave per author. If there is already an autosave, overwrite it.
+                $old_autosave = wp_get_post_autosave( $post_id, $user_id );
+
+                if ( $old_autosave ) {
+                        $new_autosave                = _wp_post_revision_data( $post_data, true );
+                        $new_autosave['ID']          = $old_autosave->ID;
+                        $new_autosave['post_author'] = $user_id;
+
+                        // If the new autosave has the same content as the post, delete the autosave.
+                        $autosave_is_different = false;
+
+                        foreach ( array_intersect( array_keys( $new_autosave ), array_keys( _wp_post_revision_fields( $post ) ) ) as $field ) {
+                                if ( normalize_whitespace( $new_autosave[ $field ] ) != normalize_whitespace( $post->$field ) ) {
+                                        $autosave_is_different = true;
+                                        break;
+                                }
+                        }
+
+                        if ( ! $autosave_is_different ) {
+                                wp_delete_post_revision( $old_autosave->ID );
+                                return new WP_Error( 'rest_autosave_no_changes', __( 'There is nothing to save. The autosave and the post content are the same.', 'gutenberg' ), array( 'status' => 400 ) );
+                        }
+
+                        /**
+                         * This filter is documented in wp-admin/post.php.
+                         */
+                        do_action( 'wp_creating_autosave', $new_autosave );
+
+                        // wp_update_post expects escaped array.
+                        return wp_update_post( wp_slash( $new_autosave ) );
+                }
+
+                // Create the new autosave as a special post revision.
+                return _wp_put_post_revision( $post_data, true );
+        }
+
+        /**
+         * Prepares the revision for the REST response.
+         *
+         * @since 5.0.0
+         *
+         * @param WP_Post         $post    Post revision object.
+         * @param WP_REST_Request $request Request object.
+         *
+         * @return WP_REST_Response Response object.
+         */
+        public function prepare_item_for_response( $post, $request ) {
+
+                $response = $this->revisions_controller->prepare_item_for_response( $post, $request );
+
+                $schema = $this->get_item_schema();
+
+                if ( ! empty( $schema['properties']['preview_link'] ) ) {
+                        $parent_id          = wp_is_post_autosave( $post );
+                        $preview_post_id    = false === $parent_id ? $post->ID : $parent_id;
+                        $preview_query_args = array();
+
+                        if ( false !== $parent_id ) {
+                                $preview_query_args['preview_id']    = $parent_id;
+                                $preview_query_args['preview_nonce'] = wp_create_nonce( 'post_preview_' . $parent_id );
+                        }
+
+                        $response->data['preview_link'] = get_preview_post_link( $preview_post_id, $preview_query_args );
+                }
+
+                $context        = ! empty( $request['context'] ) ? $request['context'] : 'view';
+                $response->data = $this->filter_response_by_context( $response->data, $context );
+
+                /**
+                 * Filters a revision returned from the API.
+                 *
+                 * Allows modification of the revision right before it is returned.
+                 *
+                 * @since 5.0.0
+                 *
+                 * @param WP_REST_Response $response The response object.
+                 * @param WP_Post          $post     The original revision object.
+                 * @param WP_REST_Request  $request  Request used to generate the response.
+                 */
+                return apply_filters( 'rest_prepare_autosave', $response, $post, $request );
+        }
+}

src/wp-settings.php

@@ -229 +229 @@
 require( ABSPATH . WPINC . '/rest-api/endpoints/class-wp-rest-post-types-controller.php' );
 require( ABSPATH . WPINC . '/rest-api/endpoints/class-wp-rest-post-statuses-controller.php' );
 require( ABSPATH . WPINC . '/rest-api/endpoints/class-wp-rest-revisions-controller.php' );
+require( ABSPATH . WPINC . '/rest-api/endpoints/class-wp-rest-autosaves-controller.php' );
 require( ABSPATH . WPINC . '/rest-api/endpoints/class-wp-rest-taxonomies-controller.php' );
 require( ABSPATH . WPINC . '/rest-api/endpoints/class-wp-rest-terms-controller.php' );
 require( ABSPATH . WPINC . '/rest-api/endpoints/class-wp-rest-users-controller.php' );

new file tests/phpunit/tests/rest-api/rest-autosaves-controller.php

@@ +1 @@
+<?php
+/**
+ * Unit tests covering WP_REST_Autosaves_Controller functionality.
+ *
+ * @package WordPress
+ * @subpackage REST API
+ */
+
+/**
+ * @group restapi-autosave
+ * @group restapi
+ */
+class WP_Test_REST_Autosaves_Controller extends WP_Test_REST_Post_Type_Controller_Testcase {
+        protected static $post_id;
+        protected static $page_id;
+
+        protected static $autosave_post_id;
+        protected static $autosave_page_id;
+
+        protected static $editor_id;
+        protected static $contributor_id;
+
+        protected function set_post_data( $args = array() ) {
+                $defaults = array(
+                        'title'   => 'Post Title',
+                        'content' => 'Post content',
+                        'excerpt' => 'Post excerpt',
+                        'name'    => 'test',
+                        'author'  => get_current_user_id(),
+                );
+
+                return wp_parse_args( $args, $defaults );
+        }
+
+        protected function check_create_autosave_response( $response ) {
+                $this->assertNotInstanceOf( 'WP_Error', $response );
+                $response = rest_ensure_response( $response );
+                $data = $response->get_data();
+
+                $this->assertArrayHasKey( 'content', $data );
+                $this->assertArrayHasKey( 'excerpt', $data );
+                $this->assertArrayHasKey( 'title', $data );
+        }
+
+        public static function wpSetUpBeforeClass( $factory ) {
+                self::$post_id = $factory->post->create();
+                self::$page_id = $factory->post->create( array( 'post_type' => 'page' ) );
+
+                self::$editor_id      = $factory->user->create(
+                        array(
+                                'role' => 'editor',
+                        )
+                );
+                self::$contributor_id = $factory->user->create(
+                        array(
+                                'role' => 'contributor',
+                        )
+                );
+
+                wp_set_current_user( self::$editor_id );
+
+                // Create an autosave.
+                self::$autosave_post_id = wp_create_post_autosave(
+                        array(
+                                'post_content' => 'This content is better.',
+                                'post_ID'      => self::$post_id,
+                                'post_type'    => 'post',
+                        )
+                );
+
+                self::$autosave_page_id = wp_create_post_autosave(
+                        array(
+                                'post_content' => 'This content is better.',
+                                'post_ID'      => self::$page_id,
+                                'post_type'    => 'post',
+                        )
+                );
+
+        }
+
+        public static function wpTearDownAfterClass() {
+                // Also deletes revisions.
+                wp_delete_post( self::$post_id, true );
+                wp_delete_post( self::$page_id, true );
+
+                self::delete_user( self::$editor_id );
+                self::delete_user( self::$contributor_id );
+        }
+
+        public function setUp() {
+                parent::setUp();
+                wp_set_current_user( self::$editor_id );
+
+                $this->post_autosave = wp_get_post_autosave( self::$post_id );
+        }
+
+        public function test_register_routes() {
+                $routes = rest_get_server()->get_routes();
+                $this->assertArrayHasKey( '/wp/v2/posts/(?P<parent>[\d]+)/autosaves', $routes );
+                $this->assertArrayHasKey( '/wp/v2/posts/(?P<parent>[\d]+)/autosaves/(?P<id>[\d]+)', $routes );
+                $this->assertArrayHasKey( '/wp/v2/pages/(?P<parent>[\d]+)/autosaves', $routes );
+                $this->assertArrayHasKey( '/wp/v2/pages/(?P<parent>[\d]+)/autosaves/(?P<id>[\d]+)', $routes );
+        }
+
+        public function test_context_param() {
+                // Collection
+                $request  = new WP_REST_Request( 'OPTIONS', '/wp/v2/posts/' . self::$post_id . '/autosaves' );
+                $response = rest_get_server()->dispatch( $request );
+                $data     = $response->get_data();
+                $this->assertEquals( 'view', $data['endpoints'][0]['args']['context']['default'] );
+                $this->assertEqualSets( array( 'view', 'edit', 'embed' ), $data['endpoints'][0]['args']['context']['enum'] );
+                // Single
+                $request  = new WP_REST_Request( 'OPTIONS', '/wp/v2/posts/' . self::$post_id . '/autosaves/' . self::$autosave_post_id );
+                $response = rest_get_server()->dispatch( $request );
+                $data     = $response->get_data();
+                $this->assertEquals( 'view', $data['endpoints'][0]['args']['context']['default'] );
+                $this->assertEqualSets( array( 'view', 'edit', 'embed' ), $data['endpoints'][0]['args']['context']['enum'] );   }
+
+        public function test_get_items() {
+                wp_set_current_user( self::$editor_id );
+                $request  = new WP_REST_Request( 'GET', '/wp/v2/posts/' . self::$post_id . '/autosaves' );
+                $response = rest_get_server()->dispatch( $request );
+                $data     = $response->get_data();
+                $this->assertEquals( 200, $response->get_status() );
+                $this->assertCount( 1, $data );
+
+                $this->assertEquals( self::$autosave_post_id, $data[0]['id'] );
+
+                $this->check_get_autosave_response( $data[0], $this->post_autosave );
+        }
+
+        public function test_get_items_no_permission() {
+                wp_set_current_user( 0 );
+                $request  = new WP_REST_Request( 'GET', '/wp/v2/posts/' . self::$post_id . '/autosaves' );
+                $response = rest_get_server()->dispatch( $request );
+                $this->assertErrorResponse( 'rest_cannot_read', $response, 401 );
+                wp_set_current_user( self::$contributor_id );
+                $response = rest_get_server()->dispatch( $request );
+                $this->assertErrorResponse( 'rest_cannot_read', $response, 403 );
+        }
+
+        public function test_get_items_missing_parent() {
+                wp_set_current_user( self::$editor_id );
+                $request  = new WP_REST_Request( 'GET', '/wp/v2/posts/' . REST_TESTS_IMPOSSIBLY_HIGH_NUMBER . '/autosaves' );
+                $response = rest_get_server()->dispatch( $request );
+                $this->assertErrorResponse( 'rest_post_invalid_parent', $response, 404 );
+        }
+
+        public function test_get_items_invalid_parent_post_type() {
+                wp_set_current_user( self::$editor_id );
+                $request  = new WP_REST_Request( 'GET', '/wp/v2/posts/' . self::$page_id . '/autosaves' );
+                $response = rest_get_server()->dispatch( $request );
+                $this->assertErrorResponse( 'rest_post_invalid_parent', $response, 404 );
+        }
+
+        public function test_get_item() {
+                wp_set_current_user( self::$editor_id );
+                $request  = new WP_REST_Request( 'GET', '/wp/v2/posts/' . self::$post_id . '/autosaves/' . self::$autosave_post_id );
+                $response = rest_get_server()->dispatch( $request );
+                $this->assertEquals( 200, $response->get_status() );
+                $data     = $response->get_data();
+
+                $this->check_get_autosave_response( $response, $this->post_autosave );
+                $fields = array(
+                        'author',
+                        'date',
+                        'date_gmt',
+                        'modified',
+                        'modified_gmt',
+                        'guid',
+                        'id',
+                        'parent',
+                        'slug',
+                        'title',
+                        'excerpt',
+                        'content',
+                );
+                $this->assertEqualSets( $fields, array_keys( $data ) );
+                $this->assertSame( self::$editor_id, $data['author'] );
+        }
+
+        public function test_get_item_embed_context() {
+                wp_set_current_user( self::$editor_id );
+                $request  = new WP_REST_Request( 'GET', '/wp/v2/posts/' . self::$post_id . '/autosaves/' . self::$autosave_post_id );
+                $request->set_param( 'context', 'embed' );
+                $response = rest_get_server()->dispatch( $request );
+                $fields   = array(
+                        'author',
+                        'date',
+                        'id',
+                        'parent',
+                        'slug',
+                        'title',
+                        'excerpt',
+                );
+                $data     = $response->get_data();
+                $this->assertEqualSets( $fields, array_keys( $data ) );
+        }
+
+        public function test_get_item_no_permission() {
+                $request = new WP_REST_Request( 'GET', '/wp/v2/posts/' . self::$post_id . '/autosaves/' . self::$autosave_post_id );
+                wp_set_current_user( self::$contributor_id );
+                $response = rest_get_server()->dispatch( $request );
+                $this->assertErrorResponse( 'rest_cannot_read', $response, 403 );
+        }
+
+        public function test_get_item_missing_parent() {
+                wp_set_current_user( self::$editor_id );
+                $request  = new WP_REST_Request( 'GET', '/wp/v2/posts/' . REST_TESTS_IMPOSSIBLY_HIGH_NUMBER . '/autosaves/' . self::$autosave_post_id );
+                $response = rest_get_server()->dispatch( $request );
+                $this->assertErrorResponse( 'rest_post_invalid_parent', $response, 404 );
+
+        }
+
+        public function test_get_item_invalid_parent_post_type() {
+                wp_set_current_user( self::$editor_id );
+                $request  = new WP_REST_Request( 'GET', '/wp/v2/posts/' . self::$page_id . '/autosaves' );
+                $response = rest_get_server()->dispatch( $request );
+                $this->assertErrorResponse( 'rest_post_invalid_parent', $response, 404 );
+        }
+
+        public function test_delete_item() {
+                // Doesn't exist.
+        }
+
+        public function test_prepare_item() {
+                wp_set_current_user( self::$editor_id );
+                $request  = new WP_REST_Request( 'GET', '/wp/v2/posts/' . self::$post_id . '/autosaves/' . self::$autosave_post_id );
+                $response = rest_get_server()->dispatch( $request );
+                $this->assertEquals( 200, $response->get_status() );
+                $this->check_get_autosave_response( $response, $this->post_autosave );
+        }
+
+        public function test_get_item_schema() {
+                $request    = new WP_REST_Request( 'OPTIONS', '/wp/v2/posts/' . self::$post_id . '/autosaves' );
+                $response   = rest_get_server()->dispatch( $request );
+                $data       = $response->get_data();
+                $properties = $data['schema']['properties'];
+                $this->assertEquals( 13, count( $properties ) );
+                $this->assertArrayHasKey( 'author', $properties );
+                $this->assertArrayHasKey( 'content', $properties );
+                $this->assertArrayHasKey( 'date', $properties );
+                $this->assertArrayHasKey( 'date_gmt', $properties );
+                $this->assertArrayHasKey( 'excerpt', $properties );
+                $this->assertArrayHasKey( 'guid', $properties );
+                $this->assertArrayHasKey( 'id', $properties );
+                $this->assertArrayHasKey( 'modified', $properties );
+                $this->assertArrayHasKey( 'modified_gmt', $properties );
+                $this->assertArrayHasKey( 'parent', $properties );
+                $this->assertArrayHasKey( 'slug', $properties );
+                $this->assertArrayHasKey( 'title', $properties );
+        }
+
+        public function test_create_item() {
+                wp_set_current_user( self::$editor_id );
+
+                $request  = new WP_REST_Request( 'POST', '/wp/v2/posts/' . self::$post_id . '/autosaves' );
+                $request->add_header( 'content-type', 'application/x-www-form-urlencoded' );
+
+                $params = $this->set_post_data(
+                        array(
+                                'id' => self::$post_id,
+                        )
+                );
+                $request->set_body_params( $params );
+                $response = rest_get_server()->dispatch( $request );
+
+                $this->check_create_autosave_response( $response );
+        }
+
+        public function test_update_item() {
+                wp_set_current_user( self::$editor_id );
+                $request  = new WP_REST_Request( 'POST', '/wp/v2/posts/' . self::$post_id . '/autosaves' );
+                $request->add_header( 'content-type', 'application/x-www-form-urlencoded' );
+
+                $params = $this->set_post_data(
+                        array(
+                                'id'     => self::$post_id,
+                                'author' => self::$contributor_id,
+                        )
+                );
+
+                $request->set_body_params( $params );
+                $response = rest_get_server()->dispatch( $request );
+
+                $this->check_create_autosave_response( $response );
+        }
+
+        public function test_update_item_nopriv() {
+                wp_set_current_user( self::$contributor_id );
+
+                $request = new WP_REST_Request( 'POST', '/wp/v2/posts/' . self::$post_id . '/autosaves' );
+                $request->add_header( 'content-type', 'application/x-www-form-urlencoded' );
+
+                $params = $this->set_post_data(
+                        array(
+                                'id'     => self::$post_id,
+                                'author' => self::$editor_id,
+                        )
+                );
+
+                $request->set_body_params( $params );
+                $response = rest_get_server()->dispatch( $request );
+
+                $this->assertErrorResponse( 'rest_cannot_edit', $response, 403 );
+        }
+
+        public function test_rest_autosave_published_post() {
+                wp_set_current_user( self::$editor_id );
+
+                $request  = new WP_REST_Request( 'POST', '/wp/v2/posts/' . self::$post_id . '/autosaves' );
+                $request->add_header( 'content-type', 'application/json' );
+
+                $current_post = get_post( self::$post_id );
+
+                $autosave_data = $this->set_post_data(
+                        array(
+                                'id'      => self::$post_id,
+                                'content' => 'Updated post \ content',
+                                'excerpt' => $current_post->post_excerpt,
+                                'title'   => $current_post->post_title,
+                        )
+                );
+
+                $request->set_body( wp_json_encode( $autosave_data ) );
+                $response = rest_get_server()->dispatch( $request );
+                $new_data = $response->get_data();
+
+                $this->assertEquals( $current_post->ID, $new_data['parent'] );
+                $this->assertEquals( $current_post->post_title, $new_data['title']['raw'] );
+                $this->assertEquals( $current_post->post_excerpt, $new_data['excerpt']['raw'] );
+                // Updated post_content
+                $this->assertNotEquals( $current_post->post_content, $new_data['content']['raw'] );
+
+                $autosave_post = wp_get_post_autosave( self::$post_id );
+                $this->assertEquals( $autosave_data['title'], $autosave_post->post_title );
+                $this->assertEquals( $autosave_data['content'], $autosave_post->post_content );
+                $this->assertEquals( $autosave_data['excerpt'], $autosave_post->post_excerpt );
+        }
+
+        public function test_rest_autosave_draft_post_same_author() {
+                wp_set_current_user( self::$editor_id );
+
+                $post_data = array(
+                        'post_content' => 'Test post content',
+                        'post_title'   => 'Test post title',
+                        'post_excerpt' => 'Test post excerpt',
+                );
+                $post_id = wp_insert_post( $post_data );
+
+                $autosave_data = array(
+                        'id' => $post_id,
+                        'content' => 'Updated post \ content',
+                        'title'   => 'Updated post title',
+                );
+
+                $request  = new WP_REST_Request( 'POST', '/wp/v2/posts/' . self::$post_id . '/autosaves' );
+                $request->add_header( 'content-type', 'application/json' );
+                $request->set_body( wp_json_encode( $autosave_data ) );
+
+                $response = rest_get_server()->dispatch( $request );
+                $new_data = $response->get_data();
+                $post = get_post( $post_id );
+
+                $this->assertEquals( $post_id, $new_data['id'] );
+                // The draft post should be updated.
+                $this->assertEquals( $autosave_data['content'], $new_data['content']['raw'] );
+                $this->assertEquals( $autosave_data['title'], $new_data['title']['raw'] );
+                $this->assertEquals( $autosave_data['content'], $post->post_content );
+                $this->assertEquals( $autosave_data['title'], $post->post_title );
+
+                // Not updated.
+                $this->assertEquals( $post_data['post_excerpt'], $post->post_excerpt );
+
+                wp_delete_post( $post_id );
+        }
+
+        public function test_rest_autosave_draft_post_different_author() {
+                wp_set_current_user( self::$editor_id );
+
+                $post_data = array(
+                        'post_content' => 'Test post content',
+                        'post_title'   => 'Test post title',
+                        'post_excerpt' => 'Test post excerpt',
+                        'post_author'  => self::$editor_id + 1,
+                );
+                $post_id = wp_insert_post( $post_data );
+
+                $autosave_data = array(
+                        'id' => $post_id,
+                        'content' => 'Updated post content',
+                        'excerpt' => $post_data['post_excerpt'],
+                        'title'   => $post_data['post_title'],
+                );
+
+                $request  = new WP_REST_Request( 'POST', '/wp/v2/posts/' . self::$post_id . '/autosaves' );
+                $request->add_header( 'content-type', 'application/json' );
+                $request->set_body( wp_json_encode( $autosave_data ) );
+
+                $response = rest_get_server()->dispatch( $request );
+                $new_data = $response->get_data();
+                $current_post = get_post( $post_id );
+
+                $this->assertEquals( $current_post->ID, $new_data['parent'] );
+
+                // The draft post shouldn't change.
+                $this->assertEquals( $current_post->post_title, $post_data['post_title'] );
+                $this->assertEquals( $current_post->post_content, $post_data['post_content'] );
+                $this->assertEquals( $current_post->post_excerpt, $post_data['post_excerpt'] );
+
+                $autosave_post = wp_get_post_autosave( $post_id );
+
+                // No changes
+                $this->assertEquals( $current_post->post_title, $autosave_post->post_title );
+                $this->assertEquals( $current_post->post_excerpt, $autosave_post->post_excerpt );
+
+                // Has changes
+                $this->assertEquals( $autosave_data['content'], $autosave_post->post_content );
+
+                wp_delete_post( $post_id );
+        }
+
+        public function test_get_additional_field_registration() {
+                $schema = array(
+                        'type'        => 'integer',
+                        'description' => 'Some integer of mine',
+                        'enum'        => array( 1, 2, 3, 4 ),
+                        'context'     => array( 'view', 'edit' ),
+                );
+
+                register_rest_field(
+                        'post-revision', 'my_custom_int', array(
+                                'schema'          => $schema,
+                                'get_callback'    => array( $this, 'additional_field_get_callback' ),
+                                'update_callback' => array( $this, 'additional_field_update_callback' ),
+                        )
+                );
+
+                $request = new WP_REST_Request( 'OPTIONS', '/wp/v2/posts/' . self::$post_id . '/autosaves' );
+
+                $response = rest_get_server()->dispatch( $request );
+                $data     = $response->get_data();
+
+                $this->assertArrayHasKey( 'my_custom_int', $data['schema']['properties'] );
+                $this->assertEquals( $schema, $data['schema']['properties']['my_custom_int'] );
+
+                wp_set_current_user( 1 );
+
+                $request = new WP_REST_Request( 'GET', '/wp/v2/posts/' . self::$post_id . '/autosaves/' . self::$autosave_post_id );
+
+                $response = rest_get_server()->dispatch( $request );
+                $this->assertArrayHasKey( 'my_custom_int', $response->data );
+
+                global $wp_rest_additional_fields;
+                $wp_rest_additional_fields = array();
+        }
+
+        public function additional_field_get_callback( $object ) {
+                return get_post_meta( $object['id'], 'my_custom_int', true );
+        }
+
+        public function additional_field_update_callback( $value, $post ) {
+                update_post_meta( $post->ID, 'my_custom_int', $value );
+        }
+
+        protected function check_get_autosave_response( $response, $autosave ) {
+                if ( $response instanceof WP_REST_Response ) {
+                        $links    = $response->get_links();
+                        $response = $response->get_data();
+                } else {
+                        $this->assertArrayHasKey( '_links', $response );
+                        $links = $response['_links'];
+                }
+
+                $this->assertEquals( $autosave->post_author, $response['author'] );
+
+                $rendered_content = apply_filters( 'the_content', $autosave->post_content );
+                $this->assertEquals( $rendered_content, $response['content']['rendered'] );
+
+                $this->assertEquals( mysql_to_rfc3339( $autosave->post_date ), $response['date'] );
+                $this->assertEquals( mysql_to_rfc3339( $autosave->post_date_gmt ), $response['date_gmt'] );
+
+                $rendered_guid = apply_filters( 'get_the_guid', $autosave->guid, $autosave->ID );
+                $this->assertEquals( $rendered_guid, $response['guid']['rendered'] );
+
+                $this->assertEquals( $autosave->ID, $response['id'] );
+                $this->assertEquals( mysql_to_rfc3339( $autosave->post_modified ), $response['modified'] );
+                $this->assertEquals( mysql_to_rfc3339( $autosave->post_modified_gmt ), $response['modified_gmt'] );
+                $this->assertEquals( $autosave->post_name, $response['slug'] );
+
+                $rendered_title = get_the_title( $autosave->ID );
+                $this->assertEquals( $rendered_title, $response['title']['rendered'] );
+
+                $parent            = get_post( $autosave->post_parent );
+                $parent_controller = new WP_REST_Posts_Controller( $parent->post_type );
+                $parent_object     = get_post_type_object( $parent->post_type );
+                $parent_base       = ! empty( $parent_object->rest_base ) ? $parent_object->rest_base : $parent_object->name;
+                $this->assertEquals( rest_url( '/wp/v2/' . $parent_base . '/' . $autosave->post_parent ), $links['parent'][0]['href'] );
+        }
+
+        public function test_get_item_sets_up_postdata() {
+                wp_set_current_user( self::$editor_id );
+                $request = new WP_REST_Request( 'GET', '/wp/v2/posts/' . self::$post_id . '/autosaves/' . self::$autosave_post_id );
+                rest_get_server()->dispatch( $request );
+
+                $post           = get_post();
+                $parent_post_id = wp_is_post_revision( $post->ID );
+
+                $this->assertEquals( $post->ID, self::$autosave_post_id );
+                $this->assertEquals( $parent_post_id, self::$post_id );
+        }
+
+}

tests/phpunit/tests/rest-api/rest-schema-setup.php

@@ -89 +89 @@
                         '/wp/v2/posts/(?P<id>[\\d]+)',
                         '/wp/v2/posts/(?P<parent>[\\d]+)/revisions',
                         '/wp/v2/posts/(?P<parent>[\\d]+)/revisions/(?P<id>[\\d]+)',
+                        '/wp/v2/posts/(?P<parent>[\\d]+)/autosaves',
+                        '/wp/v2/posts/(?P<parent>[\\d]+)/autosaves/(?P<id>[\\d]+)',
                         '/wp/v2/pages',
                         '/wp/v2/pages/(?P<id>[\\d]+)',
                         '/wp/v2/pages/(?P<parent>[\\d]+)/revisions',
                         '/wp/v2/pages/(?P<parent>[\\d]+)/revisions/(?P<id>[\\d]+)',
+                        '/wp/v2/pages/(?P<parent>[\\d]+)/autosaves',
+                        '/wp/v2/pages/(?P<parent>[\\d]+)/autosaves/(?P<id>[\\d]+)',
                         '/wp/v2/media',
                         '/wp/v2/media/(?P<id>[\\d]+)',
                         '/wp/v2/types',
@@ -153 +157 @@
                 $post_revisions = array_values( wp_get_post_revisions( $post_id ) );
                 $post_revision_id = $post_revisions[ count( $post_revisions ) - 1 ]->ID;
 
+                // Create an autosave.
+                wp_create_post_autosave(
+                        array(
+                                'post_ID'      => $post_id,
+                                'post_content' => 'Autosave post content.',
+                                'post_type'    => 'post',
+                        )
+                );
+
+
                 $page_id = $this->factory->post->create( array(
                         'post_type'      => 'page',
                         'post_name'      => 'restapi-client-fixture-page',
@@ -170 +184 @@
                 $page_revisions = array_values( wp_get_post_revisions( $page_id ) );
                 $page_revision_id = $page_revisions[ count( $page_revisions ) - 1 ]->ID;
 
+                // Create an autosave.
+                wp_create_post_autosave(
+                        array(
+                                'post_ID'      => $page_id,
+                                'post_content' => 'Autosave page content.',
+                                'post_type'    => 'page',
+                        )
+                );
+
                 $tag_id = $this->factory->tag->create( array(
                         'name'        => 'REST API Client Fixture: Tag',
                         'slug'        => 'restapi-client-fixture-tag',
@@ -255 +278 @@
                                 'route' => '/wp/v2/posts/' . $post_id . '/revisions/' . $post_revision_id,
                                 'name'  => 'revision',
                         ),
+                        array(
+                                'route' => '/wp/v2/posts/' . $post_id . '/autosaves',
+                                'name'  => 'postAutosaves',
+                        ),
+                        array(
+                                'route' => '/wp/v2/posts/' . $post_id . '/autosaves/' . $post_revision_id,
+                                'name'  => 'autosave',
+                        ),
                         array(
                                 'route' => '/wp/v2/pages',
                                 'name'  => 'PagesCollection',
@@ -271 +302 @@
                                 'route' => '/wp/v2/pages/'. $page_id . '/revisions/' . $page_revision_id,
                                 'name'  => 'pageRevision',
                         ),
+                        array(
+                                'route' => '/wp/v2/pages/' . $page_id . '/autosaves',
+                                'name'  => 'pageAutosaves',
+                        ),
+                        array(
+                                'route' => '/wp/v2/pages/' . $page_id . '/autosaves/' . $page_revision_id,
+                                'name'  => 'pageAutosave',
+                        ),
                         array(
                                 'route' => '/wp/v2/media',
                                 'name'  => 'MediaCollection',

tests/qunit/fixtures/wp-api-generated.js

@@ -850 +850 @@
                 }
             ]
         },
+        "/wp/v2/posts/(?P<parent>[\\d]+)/autosaves": {
+            "namespace": "wp/v2",
+            "methods": [
+                "GET",
+                "POST"
+            ],
+            "endpoints": [
+                {
+                    "methods": [
+                        "GET"
+                    ],
+                    "args": {
+                        "parent": {
+                            "required": false,
+                            "description": "The ID for the parent of the object.",
+                            "type": "integer"
+                        },
+                        "context": {
+                            "required": false,
+                            "default": "view",
+                            "enum": [
+                                "view",
+                                "embed",
+                                "edit"
+                            ],
+                            "description": "Scope under which the request is made; determines fields present in response.",
+                            "type": "string"
+                        },
+                        "page": {
+                            "required": false,
+                            "default": 1,
+                            "description": "Current page of the collection.",
+                            "type": "integer"
+                        },
+                        "per_page": {
+                            "required": false,
+                            "description": "Maximum number of items to be returned in result set.",
+                            "type": "integer"
+                        },
+                        "search": {
+                            "required": false,
+                            "description": "Limit results to those matching a string.",
+                            "type": "string"
+                        },
+                        "exclude": {
+                            "required": false,
+                            "default": [],
+                            "description": "Ensure result set excludes specific IDs.",
+                            "type": "array",
+                            "items": {
+                                "type": "integer"
+                            }
+                        },
+                        "include": {
+                            "required": false,
+                            "default": [],
+                            "description": "Limit result set to specific IDs.",
+                            "type": "array",
+                            "items": {
+                                "type": "integer"
+                            }
+                        },
+                        "offset": {
+                            "required": false,
+                            "description": "Offset the result set by a specific number of items.",
+                            "type": "integer"
+                        },
+                        "order": {
+                            "required": false,
+                            "default": "desc",
+                            "enum": [
+                                "asc",
+                                "desc"
+                            ],
+                            "description": "Order sort attribute ascending or descending.",
+                            "type": "string"
+                        },
+                        "orderby": {
+                            "required": false,
+                            "default": "date",
+                            "enum": [
+                                "date",
+                                "id",
+                                "include",
+                                "relevance",
+                                "slug",
+                                "include_slugs",
+                                "title"
+                            ],
+                            "description": "Sort collection by object attribute.",
+                            "type": "string"
+                        }
+                    }
+                },
+                {
+                    "methods": [
+                        "POST"
+                    ],
+                    "args": {
+                        "parent": {
+                            "required": false,
+                            "description": "The ID for the parent of the object.",
+                            "type": "integer"
+                        },
+                        "author": {
+                            "required": false,
+                            "description": "The ID for the author of the object.",
+                            "type": "integer"
+                        },
+                        "date": {
+                            "required": false,
+                            "description": "The date the object was published, in the site's timezone.",
+                            "type": "string"
+                        },
+                        "date_gmt": {
+                            "required": false,
+                            "description": "The date the object was published, as GMT.",
+                            "type": "string"
+                        },
+                        "id": {
+                            "required": false,
+                            "description": "Unique identifier for the object.",
+                            "type": "integer"
+                        },
+                        "modified": {
+                            "required": false,
+                            "description": "The date the object was last modified, in the site's timezone.",
+                            "type": "string"
+                        },
+                        "modified_gmt": {
+                            "required": false,
+                            "description": "The date the object was last modified, as GMT.",
+                            "type": "string"
+                        },
+                        "slug": {
+                            "required": false,
+                            "description": "An alphanumeric identifier for the object unique to its type.",
+                            "type": "string"
+                        },
+                        "title": {
+                            "required": false,
+                            "description": "The title for the object.",
+                            "type": "object"
+                        },
+                        "content": {
+                            "required": false,
+                            "description": "The content for the object.",
+                            "type": "object"
+                        },
+                        "excerpt": {
+                            "required": false,
+                            "description": "The excerpt for the object.",
+                            "type": "object"
+                        }
+                    }
+                }
+            ]
+        },
+        "/wp/v2/posts/(?P<parent>[\\d]+)/autosaves/(?P<id>[\\d]+)": {
+            "namespace": "wp/v2",
+            "methods": [
+                "GET"
+            ],
+            "endpoints": [
+                {
+                    "methods": [
+                        "GET"
+                    ],
+                    "args": {
+                        "parent": {
+                            "required": false,
+                            "description": "The ID for the parent of the object.",
+                            "type": "integer"
+                        },
+                        "id": {
+                            "required": false,
+                            "description": "The ID for the object.",
+                            "type": "integer"
+                        },
+                        "context": {
+                            "required": false,
+                            "default": "view",
+                            "enum": [
+                                "view",
+                                "embed",
+                                "edit"
+                            ],
+                            "description": "Scope under which the request is made; determines fields present in response.",
+                            "type": "string"
+                        }
+                    }
+                }
+            ]
+        },
         "/wp/v2/pages": {
             "namespace": "wp/v2",
             "methods": [
@@ -1456 +1650 @@
                 }
             ]
         },
+        "/wp/v2/pages/(?P<parent>[\\d]+)/autosaves": {
+            "namespace": "wp/v2",
+            "methods": [
+                "GET",
+                "POST"
+            ],
+            "endpoints": [
+                {
+                    "methods": [
+                        "GET"
+                    ],
+                    "args": {
+                        "parent": {
+                            "required": false,
+                            "description": "The ID for the parent of the object.",
+                            "type": "integer"
+                        },
+                        "context": {
+                            "required": false,
+                            "default": "view",
+                            "enum": [
+                                "view",
+                                "embed",
+                                "edit"
+                            ],
+                            "description": "Scope under which the request is made; determines fields present in response.",
+                            "type": "string"
+                        },
+                        "page": {
+                            "required": false,
+                            "default": 1,
+                            "description": "Current page of the collection.",
+                            "type": "integer"
+                        },
+                        "per_page": {
+                            "required": false,
+                            "description": "Maximum number of items to be returned in result set.",
+                            "type": "integer"
+                        },
+                        "search": {
+                            "required": false,
+                            "description": "Limit results to those matching a string.",
+                            "type": "string"
+                        },
+                        "exclude": {
+                            "required": false,
+                            "default": [],
+                            "description": "Ensure result set excludes specific IDs.",
+                            "type": "array",
+                            "items": {
+                                "type": "integer"
+                            }
+                        },
+                        "include": {
+                            "required": false,
+                            "default": [],
+                            "description": "Limit result set to specific IDs.",
+                            "type": "array",
+                            "items": {
+                                "type": "integer"
+                            }
+                        },
+                        "offset": {
+                            "required": false,
+                            "description": "Offset the result set by a specific number of items.",
+                            "type": "integer"
+                        },
+                        "order": {
+                            "required": false,
+                            "default": "desc",
+                            "enum": [
+                                "asc",
+                                "desc"
+                            ],
+                            "description": "Order sort attribute ascending or descending.",
+                            "type": "string"
+                        },
+                        "orderby": {
+                            "required": false,
+                            "default": "date",
+                            "enum": [
+                                "date",
+                                "id",
+                                "include",
+                                "relevance",
+                                "slug",
+                                "include_slugs",
+                                "title"
+                            ],
+                            "description": "Sort collection by object attribute.",
+                            "type": "string"
+                        }
+                    }
+                },
+                {
+                    "methods": [
+                        "POST"
+                    ],
+                    "args": {
+                        "parent": {
+                            "required": false,
+                            "description": "The ID for the parent of the object.",
+                            "type": "integer"
+                        },
+                        "author": {
+                            "required": false,
+                            "description": "The ID for the author of the object.",
+                            "type": "integer"
+                        },
+                        "date": {
+                            "required": false,
+                            "description": "The date the object was published, in the site's timezone.",
+                            "type": "string"
+                        },
+                        "date_gmt": {
+                            "required": false,
+                            "description": "The date the object was published, as GMT.",
+                            "type": "string"
+                        },
+                        "id": {
+                            "required": false,
+                            "description": "Unique identifier for the object.",
+                            "type": "integer"
+                        },
+                        "modified": {
+                            "required": false,
+                            "description": "The date the object was last modified, in the site's timezone.",
+                            "type": "string"
+                        },
+                        "modified_gmt": {
+                            "required": false,
+                            "description": "The date the object was last modified, as GMT.",
+                            "type": "string"
+                        },
+                        "slug": {
+                            "required": false,
+                            "description": "An alphanumeric identifier for the object unique to its type.",
+                            "type": "string"
+                        },
+                        "title": {
+                            "required": false,
+                            "description": "The title for the object.",
+                            "type": "object"
+                        },
+                        "content": {
+                            "required": false,
+                            "description": "The content for the object.",
+                            "type": "object"
+                        },
+                        "excerpt": {
+                            "required": false,
+                            "description": "The excerpt for the object.",
+                            "type": "object"
+                        }
+                    }
+                }
+            ]
+        },
+        "/wp/v2/pages/(?P<parent>[\\d]+)/autosaves/(?P<id>[\\d]+)": {
+            "namespace": "wp/v2",
+            "methods": [
+                "GET"
+            ],
+            "endpoints": [
+                {
+                    "methods": [
+                        "GET"
+                    ],
+                    "args": {
+                        "parent": {
+                            "required": false,
+                            "description": "The ID for the parent of the object.",
+                            "type": "integer"
+                        },
+                        "id": {
+                            "required": false,
+                            "description": "The ID for the object.",
+                            "type": "integer"
+                        },
+                        "context": {
+                            "required": false,
+                            "default": "view",
+                            "enum": [
+                                "view",
+                                "embed",
+                                "edit"
+                            ],
+                            "description": "Scope under which the request is made; determines fields present in response.",
+                            "type": "string"
+                        }
+                    }
+                }
+            ]
+        },
         "/wp/v2/media": {
             "namespace": "wp/v2",
             "methods": [
@@ -3723 +4111 @@
             ],
             "version-history": [
                 {
-                    "count": 1,
+                    "count": 2,
                     "href": "http://example.org/index.php?rest_route=/wp/v2/posts/4/revisions"
                 }
             ],
@@ -3814 +4202 @@
         "guid": {
             "rendered": "http://example.org/?p=5"
         },
+        "title": {
+            "rendered": ""
+        },
+        "content": {
+            "rendered": "<p>Autosave post content.</p>\n"
+        },
+        "excerpt": {
+            "rendered": ""
+        },
+        "_links": {
+            "parent": [
+                {
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/posts/4"
+                }
+            ]
+        }
+    },
+    {
+        "author": 67,
+        "date": "2017-02-14T00:00:00",
+        "date_gmt": "2017-02-14T00:00:00",
+        "id": 456,
+        "modified": "2017-02-14T00:00:00",
+        "modified_gmt": "2017-02-14T00:00:00",
+        "parent": 455,
+        "slug": "455-revision-v1",
+        "guid": {
+            "rendered": "http://example.org/?p=456"
+        },
         "title": {
             "rendered": "REST API Client Fixture: Post"
         },
@@ -3826 +4243 @@
         "_links": {
             "parent": [
                 {
-                    "href": "http://example.org/index.php?rest_route=/wp/v2/posts/4"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/posts/455"
                 }
             ]
         }
@@ -3856 +4273 @@
     }
 };
 
+mockedApiResponse.postAutosaves = [
+    {
+        "author": 67,
+        "date": "2017-02-14T00:00:00",
+        "date_gmt": "2017-02-14T00:00:00",
+        "id": 457,
+        "modified": "2017-02-14T00:00:00",
+        "modified_gmt": "2017-02-14T00:00:00",
+        "parent": 455,
+        "slug": "455-autosave-v1",
+        "guid": {
+            "rendered": "http://example.org/?p=457"
+        },
+        "title": {
+            "rendered": ""
+        },
+        "content": {
+            "rendered": "<p>Autosave post content.</p>\n"
+        },
+        "excerpt": {
+            "rendered": ""
+        },
+        "_links": {
+            "parent": [
+                {
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/posts/455"
+                }
+            ]
+        }
+    }
+];
+
+mockedApiResponse.autosave = {
+    "author": 67,
+    "date": "2017-02-14T00:00:00",
+    "date_gmt": "2017-02-14T00:00:00",
+    "id": 457,
+    "modified": "2017-02-14T00:00:00",
+    "modified_gmt": "2017-02-14T00:00:00",
+    "parent": 455,
+    "slug": "455-autosave-v1",
+    "guid": {
+        "rendered": "http://example.org/?p=457"
+    },
+    "title": {
+        "rendered": ""
+    },
+    "content": {
+        "rendered": "<p>Autosave post content.</p>\n"
+    },
+    "excerpt": {
+        "rendered": ""
+    }
+};
+
 mockedApiResponse.PagesCollection = [
     {
         "id": 6,
@@ -3915 +4387 @@
             ],
             "version-history": [
                 {
-                    "count": 1,
+                    "count": 2,
                     "href": "http://example.org/index.php?rest_route=/wp/v2/pages/6/revisions"
                 }
             ],
@@ -3990 +4462 @@
         "guid": {
             "rendered": "http://example.org/?p=7"
         },
+        "title": {
+            "rendered": ""
+        },
+        "content": {
+            "rendered": "<p>Autosave page content.</p>\n"
+        },
+        "excerpt": {
+            "rendered": ""
+        },
+        "_links": {
+            "parent": [
+                {
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/pages/6"
+                }
+            ]
+        }
+    },
+    {
+        "author": 67,
+        "date": "2017-02-14T00:00:00",
+        "date_gmt": "2017-02-14T00:00:00",
+        "id": 459,
+        "modified": "2017-02-14T00:00:00",
+        "modified_gmt": "2017-02-14T00:00:00",
+        "parent": 458,
+        "slug": "458-revision-v1",
+        "guid": {
+            "rendered": "http://example.org/?p=459"
+        },
         "title": {
             "rendered": "REST API Client Fixture: Page"
         },
@@ -4002 +4503 @@
         "_links": {
             "parent": [
                 {
-                    "href": "http://example.org/index.php?rest_route=/wp/v2/pages/6"
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/pages/458"
                 }
             ]
         }
@@ -4032 +4533 @@
     }
 };
 
+mockedApiResponse.pageAutosaves = [
+    {
+        "author": 67,
+        "date": "2017-02-14T00:00:00",
+        "date_gmt": "2017-02-14T00:00:00",
+        "id": 460,
+        "modified": "2017-02-14T00:00:00",
+        "modified_gmt": "2017-02-14T00:00:00",
+        "parent": 458,
+        "slug": "458-autosave-v1",
+        "guid": {
+            "rendered": "http://example.org/?p=460"
+        },
+        "title": {
+            "rendered": ""
+        },
+        "content": {
+            "rendered": "<p>Autosave page content.</p>\n"
+        },
+        "excerpt": {
+            "rendered": ""
+        },
+        "_links": {
+            "parent": [
+                {
+                    "href": "http://example.org/index.php?rest_route=/wp/v2/pages/458"
+                }
+            ]
+        }
+    }
+];
+
+mockedApiResponse.pageAutosave = {
+    "author": 67,
+    "date": "2017-02-14T00:00:00",
+    "date_gmt": "2017-02-14T00:00:00",
+    "id": 460,
+    "modified": "2017-02-14T00:00:00",
+    "modified_gmt": "2017-02-14T00:00:00",
+    "parent": 458,
+    "slug": "458-autosave-v1",
+    "guid": {
+        "rendered": "http://example.org/?p=460"
+    },
+    "title": {
+        "rendered": ""
+    },
+    "content": {
+        "rendered": "<p>Autosave page content.</p>\n"
+    },
+    "excerpt": {
+        "rendered": ""
+    }
+};
+
 mockedApiResponse.MediaCollection = [
     {
         "id": 8,