How do I use elements of a record as wildcards when searching find_by?

Is there a way to make an element of a record that is rails recognized as a wildcard or to implement something similar?

There is a post model that shows the article you posted.The post contains the author, title, and body that you wrote.
The post model has a one-to-many relationship with has_many:collaborations.
The collaboration model includes post_id and user_id, indicating who you share the post with to collaborate on editing and posting.

For example, post A is a post written by user A with one collaboration in it, and User B also has the right to write to post A if user B is registered in the collaboration user.

I wrote the following in the canability class:

 can: manage, Post do | post |
  Collaboration.find_by(user:user,post:post).present?
end

It seems to have been implemented so far.

I would like to include additional wildcard collaborations.Once a wildcard collaboration is registered in a post, all users have the right to co-edit.
"I would like users to be ""applicable to all users!"" at the age of find_by in the above code, but how should I implement it?"

I thought about making a subclass of collaboration, but I'm not sure.Please give me some advice!