WP_REST_Terms_Controller::create_item( WP_REST_Request $request ): WP_REST_Response|WP_Error

527	public function create_item( $request ) {528		if ( isset( $request['parent'] ) ) {529			if ( ! is_taxonomy_hierarchical( $this->taxonomy ) ) {530				return new WP_Error(531					'rest_taxonomy_not_hierarchical',532					__( 'Cannot set parent term, taxonomy is not hierarchical.' ),533					array( 'status' => 400 )534				);535			}536 537			$parent = get_term( (int) $request['parent'], $this->taxonomy );538 539			if ( ! $parent ) {540				return new WP_Error(541					'rest_term_invalid',542					__( 'Parent term does not exist.' ),543					array( 'status' => 400 )544				);545			}546		}547 548		$prepared_term = $this->prepare_item_for_database( $request );549 550		$term = wp_insert_term( wp_slash( $prepared_term->name ), $this->taxonomy, wp_slash( (array) $prepared_term ) );551		if ( is_wp_error( $term ) ) {552			/*553			 * If we're going to inform the client that the term already exists,554			 * give them the identifier for future use.555			 */556			$term_id = $term->get_error_data( 'term_exists' );557			if ( $term_id ) {558				$existing_term = get_term( $term_id, $this->taxonomy );559				$term->add_data( $existing_term->term_id, 'term_exists' );560				$term->add_data(561					array(562						'status'  => 400,563						'term_id' => $term_id,564					)565				);566			}567 568			return $term;569		}570 571		$term = get_term( $term['term_id'], $this->taxonomy );572 573		/**574		 * Fires after a single term is created or updated via the REST API.575		 *576		 * The dynamic portion of the hook name, `$this->taxonomy`, refers to the taxonomy slug.577		 *578		 * Possible hook names include:579		 *580		 *  - `rest_insert_category`581		 *  - `rest_insert_post_tag`582		 *583		 * @since 4.7.0584		 *585		 * @param WP_Term         $term     Inserted or updated term object.586		 * @param WP_REST_Request $request  Request object.587		 * @param bool            $creating True when creating a term, false when updating.588		 */589		do_action( "rest_insert_{$this->taxonomy}", $term, $request, true );590 591		$schema = $this->get_item_schema();592		if ( ! empty( $schema['properties']['meta'] ) && isset( $request['meta'] ) ) {593			$meta_update = $this->meta->update_value( $request['meta'], $term->term_id );594 595			if ( is_wp_error( $meta_update ) ) {596				return $meta_update;597			}598		}599 600		$fields_update = $this->update_additional_fields_for_object( $term, $request );601 602		if ( is_wp_error( $fields_update ) ) {603			return $fields_update;604		}605 606		$request->set_param( 'context', 'edit' );