I am trying to follow the instruction in the Gutenberg Handbook to create a block that can change meta data of a post.

Though when I try to use the setAttributes function from props to save the new data it persisted on the page, but is not actually saved back to the database, as I believe the Handbook states it should if it's source is meta. I must be missing something, but I cannot find a resource to help.


   $args = ...

   register_post_type('event', $args);

   register_meta('event', 'event_location', [
        'show_in_rest' => true,
        'single' => true,
        'type' => 'string'


registerBlockType('my-plugin/event-location', {
  title: 'Event Location',
  category: 'widgets',

  attributes: {
    location: {
      type: 'string',
      source: 'meta',
      meta: 'event_location'

  edit ({ className, attributes, setAttributes }) {
    const { location } = attributes

    function updateContent (e) {
      setAttributes({ location: e.target.value })

    return el(
      { className: className },
        { value: location, onChange: updateContent }

  save () {
    return null

Think I found the answer here. The first argument to register_meta is not post type but object_type, which is in my case should be post rather than taxonomy or comment. The function description, found here, states as of WordPress 4.9.2 the correct parameter is post. Once I switched it everything worked.

register_meta('post', 'event_location', [
    'show_in_rest' => true,
    'single' => true,
    'type' => 'string'

Also, here is a Github issue related to the same problem.

  • 1
    It's not quite that register_meta doesn't work for custom post types, it's that object_type and post_type are not the the same thing. Post, Taxonomy and Comment are object types. Page and Post are different post types, but they're both the Post object type. – Jacob Peattie May 11 '18 at 13:26
  • Thank you @JacobPeattie, I understand. I am new to WordPress and getting used to the nomenclature. I will adjust my answer. – lookyhooky May 11 '18 at 23:06
  • Since 4.9.8 you can use register_post_meta and include the post type, so in your case it would be: register_post_meta('event', 'event_location', /*...*/ ) – Alvaro Nov 24 '18 at 22:46

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.