wp-includes/rest-api/endpoints/class-wp-rest-templates-controller.php:575Prepares a single template for create or update.
$requestWP_REST_RequeststdClass|WP_ErrorOne hook fires while WP_REST_Templates_Controller::prepare_item_for_database() runs, in this order:
Filters a post before it is inserted via the REST API.
protected function prepare_item_for_database( $request ) { $template = $request['id'] ? get_block_template( $request['id'], $this->post_type ) : null; $changes = new stdClass(); if ( null === $template ) { $changes->post_type = $this->post_type; $changes->post_status = 'publish'; $changes->tax_input = array( 'wp_theme' => $request['theme'] ?? get_stylesheet(), ); } elseif ( 'custom' !== $template->source ) { $changes->post_name = $template->slug; $changes->post_type = $this->post_type; $changes->post_status = 'publish'; $changes->tax_input = array( 'wp_theme' => $template->theme, ); $changes->meta_input = array( 'origin' => $template->source, ); } else { $changes->post_name = $template->slug; $changes->ID = $template->wp_id; $changes->post_status = 'publish'; } if ( isset( $request['content'] ) ) { if ( is_string( $request['content'] ) ) { $changes->post_content = $request['content']; } elseif ( isset( $request['content']['raw'] ) ) { $changes->post_content = $request['content']['raw']; } } elseif ( null !== $template && 'custom' !== $template->source ) { $changes->post_content = $template->content; } if ( isset( $request['title'] ) ) { if ( is_string( $request['title'] ) ) { $changes->post_title = $request['title']; } elseif ( ! empty( $request['title']['raw'] ) ) { $changes->post_title = $request['title']['raw']; } } elseif ( null !== $template && 'custom' !== $template->source ) { $changes->post_title = $template->title; } if ( isset( $request['description'] ) ) { $changes->post_excerpt = $request['description']; } elseif ( null !== $template && 'custom' !== $template->source ) { $changes->post_excerpt = $template->description; } if ( 'wp_template' === $this->post_type && isset( $request['is_wp_suggestion'] ) ) { $changes->meta_input = wp_parse_args( array( 'is_wp_suggestion' => $request['is_wp_suggestion'], ), $changes->meta_input = array() ); } if ( 'wp_template_part' === $this->post_type ) { if ( isset( $request['area'] ) ) { $changes->tax_input['wp_template_part_area'] = _filter_block_template_part_area( $request['area'] ); } elseif ( null !== $template && 'custom' !== $template->source && $template->area ) { $changes->tax_input['wp_template_part_area'] = _filter_block_template_part_area( $template->area ); } elseif ( empty( $template->area ) ) { $changes->tax_input['wp_template_part_area'] = WP_TEMPLATE_PART_AREA_UNCATEGORIZED; } } if ( ! empty( $request['author'] ) ) { $post_author = (int) $request['author']; if ( get_current_user_id() !== $post_author ) { $user_obj = get_userdata( $post_author ); if ( ! $user_obj ) { return new WP_Error( 'rest_invalid_author', __( 'Invalid author ID.' ), array( 'status' => 400 ) ); }Introduced in 5.8.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/rest-api/endpoints/class-wp-rest-templates-controller.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.