Home › Forums › General Issues › What is stored in the Relationship Field? › Reply To: What is stored in the Relationship Field?
The Relationship field holds an array of post IDs. I don’t think you can add a hidden field and do this, ACF uses the field IDs in the form and the posted data all in the “acf” index of $_POST.
I think you need to create an acf/save post filter to add posts to the relationship field. http://www.advancedcustomfields.com/resources/acfsave_post/
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