Ticket #40807: 40807.4.diff

src/wp-includes/class-wp-customize-manager.php

@@ -1381 +1381 @@
                                 }
                         }
 
+                        // Translate the parent post symbol to an ID and assign it to the post_parent field.
+                        $post_relations = array();
+                        foreach ( array_keys( $posts ) as $post_symbol ) {
+                                if ( ! empty( $posts[ $post_symbol ]['parent'] )
+                                        && preg_match( '/^{{(?P<symbol>.+)}}$/', $posts[ $post_symbol ]['parent'], $matches ) ) {
+                                        $post_relations[] = array(
+                                                'post_id'            => $posts[ $post_symbol ]['ID'],
+                                                'post_symbol'        => $post_symbol,
+                                                'parent_post_symbol' => $matches['symbol'],
+                                        );
+                                }
+                        }
+                        foreach ( $post_relations as $relation ) {
+                                $post_id            = $relation['post_id'];
+                                $post_symbol        = $relation['post_symbol'];
+                                $parent_post_symbol = $relation['parent_post_symbol'];
+
+                                if ( isset( $posts[ $parent_post_symbol ]['ID'] ) ) {
+                                        $posts[ $post_symbol ]['post_parent'] = $posts[ $parent_post_symbol ]['ID'];
+                                        wp_update_post( array(
+                                                'ID'          => $post_id,
+                                                'post_parent' => $posts[ $post_symbol ]['post_parent'],
+                                        ) );
+                                }
+                        }
+
                         $starter_content_auto_draft_post_ids = array_merge( $starter_content_auto_draft_post_ids, wp_list_pluck( $posts, 'ID' ) );
                 }
 

src/wp-includes/theme.php

@@ -2175 +2175 @@
                                                                 'comment_status',
                                                                 'thumbnail',
                                                                 'template',
+                                                                'parent',
                                                         )
                                                 );
                                         } elseif ( is_string( $item ) && ! empty( $core_content[ $type ][ $item ] ) ) {

tests/phpunit/tests/customize/manager.php

@@ -741 +741 @@
         }
 
         /**
+         * Test import_theme_starter_content() should support post_parent.
+         *
+         * @covers WP_Customize_Manager::import_theme_starter_content()
+         * @ticket 40807
+         */
+        public function test_import_theme_starter_content_should_support_post_parent() {
+                wp_set_current_user( self::$admin_user_id );
+
+                global $wp_customize;
+                $wp_customize = new WP_Customize_Manager();
+
+                $starter_content_config = array(
+                        'posts' => array(
+                                'animal' => array(
+                                        'post_type'  => 'page',
+                                        'post_title' => 'Animal',
+                                ),
+                                'bird'   => array(
+                                        'post_type'  => 'page',
+                                        'post_title' => 'Bird',
+                                        'parent'     => '{{animal}}',
+                                ),
+                                'owl'    => array(
+                                        'post_type'  => 'page',
+                                        'post_title' => 'Owl',
+                                        'parent'     => '{{birds}}', // Non-existing post symbol that should result in post_parent as 0.
+                                ),
+                                'salmon' => array(
+                                        'post_type'  => 'page',
+                                        'post_title' => 'Salmon',
+                                        'parent'     => '{{fish}}',
+                                ),
+                                /* It shouldn't matter if the parent is defined after the child */
+                                'fish'   => array(
+                                        'post_type'  => 'page',
+                                        'post_title' => 'Fish',
+                                        'parent'     => '{{animal}}',
+                                ),
+                        ),
+                );
+
+                add_theme_support( 'starter-content', $starter_content_config );
+                $this->assertEmpty( $wp_customize->unsanitized_post_values() );
+                $wp_customize->import_theme_starter_content();
+                $changeset_values = $wp_customize->unsanitized_post_values();
+
+                $posts_by_name = array();
+                foreach ( $changeset_values['nav_menus_created_posts'] as $post_id ) {
+                        $post = get_post( $post_id );
+                        $post_name = $post->post_name;
+                        if ( empty( $post_name ) ) {
+                                $post_name = get_post_meta( $post->ID, '_customize_draft_post_name', true );
+                        }
+                        $posts_by_name[ $post_name ] = $post->ID;
+                }
+
+                $this->assertSame( $posts_by_name['animal'], get_post_field( 'post_parent', $posts_by_name['bird'] ) );
+                $this->assertSame( $posts_by_name['animal'], get_post_field( 'post_parent', $posts_by_name['fish'] ) );
+                $this->assertSame( $posts_by_name['fish'], get_post_field( 'post_parent', $posts_by_name['salmon'] ) );
+                $this->assertSame( 0, get_post_field( 'post_parent', $posts_by_name['animal'] ) );
+                $this->assertSame( 0, get_post_field( 'post_parent', $posts_by_name['owl'] ) );
+        }
+
+        /**
          * Test WP_Customize_Manager::customize_preview_init().
          *
          * @ticket 30937