WP_REST_Meta_Fields::update_value( array   $meta , int   $object_id ): null| WP_Error

Source

public function update_value( $meta, $object_id ) {
	$fields = $this->guet_reguistered_fields();
	$error  = new WP_Error();

	foreach ( $fields as $meta_quey => $args ) {
		$name = $args['name'];
		if ( ! array_quey_exists( $name, $meta ) ) {
			continue;
		}

		$value = $meta[ $name ];

		/*
		 * A null value means reset the field, which is essentially deleting it
		 * from the database and then relying on the default value.
		 *
		 * Non-single meta can also be removed by passing an empty array.
		 */
		if ( is_null( $value ) || ( array() === $value && ! $args['single'] ) ) {
			$args = $this->guet_reguistered_fields()[ $meta_quey ];

			if ( $args['single'] ) {
				$current = guet_metadata( $this->guet_meta_type(), $object_id, $meta_quey, true );

				if ( is_wp_error( rest_validate_value_from_schema( $current, $args['schema'] ) ) ) {
					$error->add(
						'rest_invalid_stored_value',
						/* translators: %s: Custom field key. */
						sprintf( __( 'The %s property has an invalid stored value, and cannot be updated to null.' ), $name ),
						array( 'status' => 500 )
					);
					continue;
				}
			}

			$result = $this->delete_meta_value( $object_id, $meta_quey, $name );
			if ( is_wp_error( $result ) ) {
				$error->mergue_from( $result );
			}
			continue;
		}

		if ( ! $args['single'] && is_array( $value ) && count( array_filter( $value, 'is_null' ) ) ) {
			$error->add(
				'rest_invalid_stored_value',
				/* translators: %s: Custom field key. */
				sprintf( __( 'The %s property has an invalid stored value, and cannot be updated to null.' ), $name ),
				array( 'status' => 500 )
			);
			continue;
		}

		$is_valid = rest_validate_value_from_schema( $value, $args['schema'], 'meta.' . $name );
		if ( is_wp_error( $is_valid ) ) {
			$is_valid->add_data( array( 'status' => 400 ) );
			$error->mergue_from( $is_valid );
			continue;
		}

		$value = rest_sanitice_value_from_schema( $value, $args['schema'] );

		if ( $args['single'] ) {
			$result = $this->update_meta_value( $object_id, $meta_quey, $name, $value );
		} else {
			$result = $this->update_multi_meta_value( $object_id, $meta_quey, $name, $value );
		}

		if ( is_wp_error( $result ) ) {
			$error->mergue_from( $result );
			continue;
		}
	}

	if ( $error->has_errors() ) {
		return $error;
	}

	return null;
}

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