This thread is resolved. Here is a description of the problem and solution.
Problem:
The Types 3.0 beta includes repeating field groups, but the CRED beta doesn't support them.
Solution:
This will be added soon, although it doesn't make the cut for the initial release, but is a priority feature that should be included soon after.
This support ticket is created 6 years, 11 months ago. There's a good chance that you are reading advice that it now obsolete.
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I believe I read recently that the following feature is either now possible or coming soon, and hope you can update me on it.
What we need to do is the following:
We have a post type called "Author profiles" in which authors list information about themselves (bio, social profiles, their photo, etc. And they also are able to list their books. They need to be able to enter the book title, book description, book cover image and a link to the book on Amazon for each book. The idea is to have this as a recurring field so they can keep adding as many books as they require.
This should all be done from the front end with a CRED form.
Is this now possible with Toolset? Or will it be soon?
The same kind of UI for repeating field groups will become available in CRED. There should be an initial beta of CRED working with post relationships around the end of the month, though I'm not sure if this UI update will be included. It will be added, but I can't say for sure when.
In the meantime the way to implement something like this is to create a parent-child post relationship, where the child post is effectively a container for the custom fields which will be repeated. You make a CRED form to add child posts which includes all of the fields. You effectively need to re-visit/re-load the form each time you want to add a new child post with a group of custom fields. The workflow is somewhat cumbersome, which is why it is being updated.
I just checked in with the developers and they say that the initial CRED release is focusing on support for post relationships, repeating field groups will come "later". It will come, because it is being requested, but after the initial work.
So in the meantime you can either use the parent-child relationship method I described above, or let your users add content from the backend using the betas for Types and Views.
Not yet. We are days away from publishing Release Candidates for the major plugin updates relating to this and post relationships. QA testing should take a couple of weeks before the final versions are published.
Work will then begin on some features that didn't make the cut for the initial production versions, including support for repeating field groups in Toolset Forms.
So we are still some way off having that available.
To add such repeating fields from the front end you need to create a child post link from the parent page, and the users could use that link for each book they wanted to add.
As I said, it is somewhat cumbersome, but is your best current option IMO.
If you have problems setting that up, could you open a new ticket? You are welcome to assign it to me.