hooks - Validate custom fields before save using WordPress Rest API

I want to add custom validation to post(custom post type) before it save into the WordPress. I am using the Rest API to insert the post to custom post type. What I need is the fields which I created using ACF(Advance Custom Fields) should be validated before it actually save into the WordPress Backend. I tried to find the hook action for before save but no luck so far. Quick help will be appreciate.

I want to add custom validation to post(custom post type) before it save into the WordPress. I am using the Rest API to insert the post to custom post type. What I need is the fields which I created using ACF(Advance Custom Fields) should be validated before it actually save into the WordPress Backend. I tried to find the hook action for before save but no luck so far. Quick help will be appreciate.

• custom-post-types
• hooks
• advanced-custom-fields
• validation

Share Improve this question asked Dec 12, 2018 at 13:06 Jenil KananiJenil Kanani 12155 bronze badges 12

• Thanks for the quick answer. But When I call the API using the POST method for storing the data into custom post type. It's not validates the fields which I checked as required in ACF. – Jenil Kanani Commented Dec 12, 2018 at 13:11
• Hi @vikrantzilpe The above functions not worked for me for custom post type. Do you have any work around here? – Jenil Kanani Commented Dec 12, 2018 at 13:16
• Thanks for look into this but above link is only guide me how to create custom post type. – Jenil Kanani Commented Dec 12, 2018 at 13:41
• @vikrantzilpe Do you find any hooks actions that runs before saving the posts where I can validate each fields that passed into rest api? – Jenil Kanani Commented Dec 12, 2018 at 13:42
• add_action('acf/validate_save_post', 'my_acf_validate_save_post', 10, 0); – vikrant zilpe Commented Dec 12, 2018 at 13:44

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Sorted by: Reset to default 1

By searching a lot to API documentation, I found the solution to my problem finally:

function my_rest_prepare_post(  $prepared_post, $request ) {

...

}
add_filter( 'rest_pre_insert_posttype', 'my_rest_prepare_post', 10, 3 );