protected function update_meta_value( $object_id, $name, $value ) {
		if ( ! current_user_can( 'edit_post_meta', $object_id, $name ) ) {
			return new WP_Error(
				'rest_cannot_update',
				sprintf( __( 'You do not have permission to edit the %s custom field.' ), $name ),
				array( 'key' => $name, 'status' => rest_authorization_required_code() )
			);
		}

		$meta_type  = $this->get_meta_type();
		$meta_key   = wp_slash( $name );
		$meta_value = wp_slash( $value );

		// Do the exact same check for a duplicate value as in update_metadata() to avoid update_metadata() returning false.
		$old_value = get_metadata( $meta_type, $object_id, $meta_key );
		if ( 1 === count( $old_value ) ) {
			if ( $old_value[0] === $meta_value ) {
				return true;
			}
		}

		if ( ! update_metadata( $meta_type, $object_id, $meta_key, $meta_value ) ) {
			return new WP_Error(
				'rest_meta_database_error',
				__( 'Could not update meta value in database.' ),
				array( 'key' => $name, 'status' => WP_Http::INTERNAL_SERVER_ERROR )
			);
		}

		return true;
	}
protected function update_meta_value( $object_id, $name, $value ) {
		if ( ! current_user_can( 'edit_post_meta', $object_id, $name ) ) {
			return new WP_Error(
				'rest_cannot_update',
				sprintf( __( 'You do not have permission to edit the %s custom field.' ), $name ),
				array( 'key' => $name, 'status' => rest_authorization_required_code() )
			);
		}

		$meta_type  = $this->get_meta_type();
		$meta_key   = wp_slash( $name );
		$meta_value = wp_slash( $value );

		// Do the exact same check for a duplicate value as in update_metadata() to avoid update_metadata() returning false.
		$old_value = get_metadata( $meta_type, $object_id, $meta_key );
		if ( 1 === count( $old_value ) ) {
			if ( $old_value[0] === $meta_value ) {
				return true;
			}
		}

		if ( ! update_metadata( $meta_type, $object_id, $meta_key, $meta_value ) ) {
			return new WP_Error(
				'rest_meta_database_error',
				__( 'Could not update meta value in database.' ),
				array( 'key' => $name, 'status' => WP_Http::INTERNAL_SERVER_ERROR )
			);
		}

		return true;
	}
protected function update_meta_value ( $ object_id , $ name , $ value ) { if ( ! current_user_can ( 'edit_post_meta' , $ object_id , $ name ) ) { return new WP_Error ( 'rest_cannot_update' , sprintf ( __ ( 'You do not have permission to edit the %s custom field.' ) , $ name ) , array ( 'key' => $ name , 'status' => rest_authorization_required_code ( ) ) ) ; } $ meta_type = $ this -> get_meta_type ( ) ; $ meta_key = wp_slash ( $ name ) ; $ meta_value = wp_slash ( $ value ) ; // Do the exact same check for a duplicate value as in update_metadata() to avoid update_metadata() returning false. $ old_value = get_metadata ( $ meta_type , $ object_id , $ meta_key ) ; if ( 1 === count ( $ old_value ) ) { if ( $ old_value [ 0 ] === $ meta_value ) { return true ; } } if ( ! update_metadata ( $ meta_type , $ object_id , $ meta_key , $ meta_value ) ) { return new WP_Error ( 'rest_meta_database_error' , __ ( 'Could not update meta value in database.' ) , array ( 'key' => $ name , 'status' => WP_Http :: INTERNAL_SERVER_ERROR ) ) ; } return true ; }
Update meta value for an object.

@param int    $object_id Object ID to update.
@param string $name      Key for the custom field.
@param mixed  $value     Updated value.
@return bool|WP_Error True if meta field is updated, error otherwise.
Update meta value for an object .