Add a guide for "how to work with meta"

Hi, i tried to update post meta, when i created posts, but nothing happened It’s possible with node-wpapi? wp.song().create({ title: '1', content: 'Your post content', status: 'publish', meta: {key: 'youtube', value: '12'}, }).then(function( response ) { console.log( response.id ); })

[dimadin]

When you create/update post, you pass meta object, for example:

wpapi.posts().create( {
	title: 'Your Title',
	content: ' Your content',
	status: 'publish',
	meta: {
		custom_meta_key: 'something'
	}
} ).then( function( response ) {
	// whatever
} );

On the server side, you must use register_meta(). If you are using custom post type, the post type must have custom-fields support (see documentation for $args['supports'] of register_post_type(). That is documented for REST API.

But if you are using meta with custom role, your role should also have edit_post_meta (and delete_post_meta if you are deleting) capability. See code for WP_REST_Meta_Fields::update_meta_value() and WP_REST_Meta_Fields::delete_meta_value(). I haven’t seen that this is documented anywhere so I figured it out during debugging.

[dmdb]

Messed with the same problem, being total noob in wordpress infrastructure. Solved by putting

register_meta('post', 'duration', [
  'type' => 'integer',
  'description' => 'duration',
  'single' => true,
  'show_in_rest' => true,
]);

into functions.php of theme. This unlocked me:

meta: { duration: 123 }