Topic Tag: Content-submission forms

Problem:
How can I set a Post that is submitted with CRED, to be child to the Post, where the Form is inserted?
I also need to update it's title with a value coming from a Post Field

Solution:
You will use a Custom CRED API (cred_save_data) and Wordpress API (mainly get_ and update_post_meta) to achieve this

You will put the function created into your Theme's functions.php

In the Code, you will:
get_post_meta the field's value with which you want to update your Post title
wp_update_post the title with the above value

You must note that the parent post ID in this case will be the ID of the Post where you show the CRED, and this is stored in the CRED API $form_data['container_id'];

With this value you update the posts hidden field _wpcf_belongs_parent-post-slug_id

A good example is visible there:
http://pastebin.com/2BTbVbcs
https://toolset.com/forums/topic/register-for-event/page/2/#post-388619

Relevant Documentation:
https://toolset.com/documentation/user-guides/creating-cred-forms/
https://toolset.com/documentation/user-guides/cred-api/#csd
https://codex.wordpress.org/Child_Themes
https://codex.wordpress.org/Functions_File_Explained
https://codex.wordpress.org/WP_DEBUG