[Resolved] Write Custom Field with Post Relationships API

[Author]

Posts

[phuong-phiD]

I have defined a custom field for a relationship. Now I want to write the custom field using the post relationship API but I can't find how to do it on the page https://toolset.com/documentation/customizing-sites-using-php/post-relationships-api/

[Minesh]

Hello. Thank you for contacting the Toolset support.

Well - I would like to know first what is your field type of intermediary post type?

As well as, I would like to know at which point of action you want to update the custom field of intermediary post type? when saving post in backend?

[phuong-phiD]

Hi Minesh,

- what is your field type of intermediary post type?
text field "source" for the relationship "candidate-event"

- which point of action you want to update the custom field of intermediary post type?
cred_submit_complete

add_action('cred_submit_complete', 'gwf_register_event_new_user', 10, 2);
function gwf_register_event_new_user($post_id, $form_data) {
...
// Connect candidate and event
toolset_connect_posts( 'candidate-event', $candidate_id, $event_id );
// Add custom field "source" to the connection "candidate-event"
$source = $_GET['source'];
???
}

[phuong-phiD]

Your question about the "intermediary post type" helped me find the solution. A relationship is made with an intermediary post type so I have to write the custom field of the intermediary post type.

To get the post ID of the intermediary post type
https://toolset.com/documentation/customizing-sites-using-php/post-relationships-api/#toolset_connect_posts
"On success, also outputs the ID of the created "intermediary_post" (zero is output if none was created)"

To write a field of a custom post type
https://codex.wordpress.org/Function_Reference/update_post_meta
update_post_meta( $post_id, $meta_key, $meta_value, $prev_value );

$connection = toolset_connect_posts( 'candidate-event', $candidate_id, $event_id );

$cpt_id = $connection['intermediary_post'];
$source = 'xyz';
if ($cpt_id != 0) {
  update_post_meta( $cpt_id, 'wpcf-source', $source );	  
}