Changeset 52316

Timestamp:

12/03/2021 07:37:32 PM (3 years ago)

Author:

hellofromTonya

Message:

Editor: Resolve template request ?_wp-find-template=true for new posts and pages.

The template resolution system makes a request like /?page_id=1234&_wp-find-template=true, depending on WP_Query to resolve a page or post using the page_id or p (post_id) in the query string. With new posts/pages, a placeholder post with the status auto-draft is created. But by default WP_Query will not resolve these posts, unless the query is specifically set to look for them.

This commit handles the query string to properly resolve a page or post. It adds 2 private callbacks for the processing.

Props poena, noisysocks, bernhard-reiter, costdev, hellofromTonya.
Fixes #54553.

Location:

trunk/src/wp-includes

Files:

• block-template.php (modified) (2 diffs)
• default-filters.php (modified) (1 diff)

trunk/src/wp-includes/block-template.php

@@ -5 +5 @@
  * @package WordPress
  */
+
+/**
+ * Adds necessary filters to use 'wp_template' posts instead of theme template files.
+ *
+ * @access private
+ * @since 5.9.0
+ */
+function _add_template_loader_filters() {
+    if ( ! current_theme_supports( 'block-templates' ) ) {
+        return;
+    }
+
+    $template_types = array_keys( get_default_block_template_types() );
+    foreach ( $template_types as $template_type ) {
+        // Skip 'embed' for now because it is not a regular template type.
+        if ( 'embed' === $template_type ) {
+            continue;
+        }
+        add_filter( str_replace( '-', '', $template_type ) . '_template', 'locate_block_template', 20, 3 );
+    }
+
+    // Request to resolve a template.
+    if ( isset( $_GET['_wp-find-template'] ) ) {
+        add_filter( 'pre_get_posts', '_resolve_template_for_new_post' );
+    }
+}
 
 /**
@@ -267 +293 @@
     return $context;
 }
+
+/**
+ * Sets the current WP_Query to return auto-draft posts.
+ *
+ * The auto-draft status indicates a new post, so allow the the WP_Query instance to
+ * return an auto-draft post for template resolution when editing a new post.
+ *
+ * @access private
+ * @since 5.9.0
+ *
+ * @param WP_Query $wp_query Current WP_Query instance, passed by reference.
+ */
+function _resolve_template_for_new_post( $wp_query ) {
+    remove_filter( 'pre_get_posts', '_resolve_template_for_new_post' );
+
+    // Pages.
+    $page_id = isset( $wp_query->query['page_id'] ) ? $wp_query->query['page_id'] : null;
+
+    // Posts, including custom post types.
+    $p = isset( $wp_query->query['p'] ) ? $wp_query->query['p'] : null;
+
+    $post_id = $page_id ? $page_id : $p;
+    $post    = get_post( $post_id );
+
+    if (
+        $post &&
+        'auto-draft' === $post->post_status &&
+        current_user_can( 'edit_post', $post->ID )
+    ) {
+        $wp_query->set( 'post_status', 'auto-draft' );
+    }
+}

trunk/src/wp-includes/default-filters.php

@@ -681 +681 @@
 add_action( 'wp_footer', 'the_block_template_skip_link' );
 add_action( 'setup_theme', 'wp_enable_block_templates' );
+add_action( 'wp_loaded', '_add_template_loader_filters' );
 
 unset( $filter, $action );