public function create_item( $request ) {
    if ( ! empty( $request['id'] ) ) {
      return new WP_Error(
        'rest_post_exists',
        __( 'Cannot create existing post.' ),
        array( 'status' => 400 )
      );
    }

    $prepared_post = $this->WP_REST_Posts_Controller::prepare_item_for_database( $request );

    if ( is_wp_error( $prepared_post ) ) {
      return $prepared_post;
    }

    $prepared_post->post_type = $this->post_type;

    if ( ! empty( $prepared_post->post_name )
      && ! empty( $prepared_post->post_status )
      && in_array( $prepared_post->post_status, array( 'draft', 'pending' ), true )
    ) {
      /*
			 * `wp_unique_post_slug()` returns the same slug for 'draft' or 'pending' posts.
			 *
			 * To ensure that a unique slug is generated, pass the post data with the 'publish' status.
			 */
      $prepared_post->post_name = wp_unique_post_slug(
        $prepared_post->post_name,
        $prepared_post->id,
        'publish',
        $prepared_post->post_type,
        $prepared_post->post_parent
      );
    }

    $post_id = wp_insert_post( wp_slash( (array) $prepared_post ), true, false );

    if ( is_wp_error( $post_id ) ) {

      if ( 'db_insert_error' === $post_id->get_error_code() ) {
        $post_id->add_data( array( 'status' => 500 ) );
      } else {
        $post_id->add_data( array( 'status' => 400 ) );
      }

      return $post_id;
    }

    $post = get_post( $post_id );

    
/**
 * Fires after a single post is created or updated via the REST API.
 *
 * The dynamic portion of the hook name, `$this->post_type`, refers to the post type slug.
 *
 * Possible hook names include:
 *
 *  - `rest_insert_post`
 *  - `rest_insert_page`
 *  - `rest_insert_attachment`
 *
 * @since 4.7.0
 *
 * @param WP_Post         $post     Inserted or updated post object.
 * @param WP_REST_Request $request  Request object.
 * @param bool            $creating True when creating a post, false when updating.
 */
    do_action( "rest_insert_{$this->post_type}", $post, $request, true );

    $schema = $this->WP_REST_Posts_Controller::get_item_schema();

    if ( ! empty( $schema['properties']['sticky'] ) ) {
      if ( ! empty( $request['sticky'] ) ) {
        stick_post( $post_id );
      } else {
        unstick_post( $post_id );
      }
    }

    if ( ! empty( $schema['properties']['featured_media'] ) && isset( $request['featured_media'] ) ) {
      $this->WP_REST_Posts_Controller::handle_featured_media( $request['featured_media'], $post_id );
    }

    if ( ! empty( $schema['properties']['format'] ) && ! empty( $request['format'] ) ) {
      set_post_format( $post, $request['format'] );
    }

    if ( ! empty( $schema['properties']['template'] ) && isset( $request['template'] ) ) {
      $this->WP_REST_Posts_Controller::handle_template( $request['template'], $post_id, true );
    }

    $terms_update = $this->WP_REST_Posts_Controller::handle_terms( $post_id, $request );

    if ( is_wp_error( $terms_update ) ) {
      return $terms_update;
    }

    if ( ! empty( $schema['properties']['meta'] ) && isset( $request['meta'] ) ) {
      $meta_update = $this->meta->update_value( $request['meta'], $post_id );