I am trying to wrap my head around how to use save_post and update_field to combine a field from a post, as well as an option field, into a new field within said post. I don’t know if I need to create the new field first and somehow hide it from the options form, or if I can have it display after save but make it non-editable.. or if acf just makes it in the background without the need for me to make it first (sorry if that doesn’t make sense).
Here’s what I’m trying to do:
In an acf options page, a user will enter their affiliate id: affiliate_id
When creating a post, they will enter a product number: product_id
When the post is saved I want a new field named “link”, within that post, to automatically combine those values so that the following is saved for the new “link” field:
however, I would not do this. I would assume that there is something in the post that relates that post to the user. When outputting the post I would look up the get the ID value and append it to the url generated by get_permalink() https://developer.wordpress.org/reference/functions/get_permalink/ rather than create and/or update a field holding a link to the page.
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