Ticket #44983: 44983.2.diff

src/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php

@@ -685 +685 @@
                 }
 
                 if ( isset( $request['parent'] ) && ! empty( $schema['properties']['parent'] ) ) {
-                        $parent_term_id = 0;
-                        $parent_term    = get_term( (int) $request['parent'], $this->taxonomy );
+                        $parent_term_id   = 0;
+                        $requested_parent = (int) $request['parent'];
 
-                        if ( $parent_term ) {
-                                $parent_term_id = $parent_term->term_id;
+                        if ( $requested_parent ) {
+                                $parent_term = get_term( $requested_parent, $this->taxonomy );
+
+                                if ( $parent_term instanceof WP_Term ) {
+                                        $parent_term_id = $parent_term->term_id;
+                                }
                         }
 
                         $prepared_term->parent = $parent_term_id;

tests/phpunit/tests/rest-api/rest-categories-controller.php

@@ -859 +859 @@
                 $this->assertErrorResponse( 'rest_term_invalid', $response, 400 );
         }
 
+        public function test_create_item_with_no_parent() {
+                wp_set_current_user( self::$administrator );
+                $parent  = 0;
+                $request = new WP_REST_Request( 'POST', '/wp/v2/categories' );
+                $request->set_param( 'name', 'My Awesome Term' );
+                $request->set_param( 'parent', $parent );
+                $response = rest_get_server()->dispatch( $request );
+                $this->assertEquals( 201, $response->get_status() );
+                $data = $response->get_data();
+                $this->assertEquals( $parent, $data['parent'] );
+        }
+
         public function test_update_item() {
                 wp_set_current_user( self::$administrator );
                 $orig_args = array(
@@ -929 +941 @@
                 $this->assertEquals( $parent->term_id, $data['parent'] );
         }
 
+        public function test_update_item_remove_parent() {
+                wp_set_current_user( self::$administrator );
+
+                $old_parent_term = get_term_by( 'id', $this->factory->category->create(), 'category' );
+                $new_parent_id   = 0;
+
+                $term = get_term_by(
+                        'id',
+                        $this->factory->category->create(
+                                [
+                                        'parent' => $old_parent_term->term_id,
+                                ]
+                        ),
+                        'category'
+                );
+
+                $this->assertEquals( $old_parent_term->term_id, $term->parent );
+
+                $request = new WP_REST_Request( 'POST', '/wp/v2/categories/' . $term->term_id );
+                $request->set_param( 'parent', $new_parent_id );
+                $response = rest_get_server()->dispatch( $request );
+                $this->assertEquals( 200, $response->get_status() );
+
+                $data = $response->get_data();
+                $this->assertEquals( $new_parent_id, $data['parent'] );
+        }
+
         public function test_update_item_invalid_parent() {
                 wp_set_current_user( self::$administrator );
                 $term = get_term_by( 'id', $this->factory->category->create(), 'category' );