In Views, I have an exposed filter that looks at the UID (User ID / Author), but is there a way to limit this to "ONLY" the users who have posted in this content type?
I tried adding a "Content: Author" relationship and hit Apply. I'm not exactly sure why, but it wasn't until this point that I could go back into the relationships and see MORE options, like: "User: Content authored" (which must then be dependent on the first relationship?) so I selected that one too and set it up like so: Now I was able to go to the exposed filter and select the relationship:
But this didn't work-- the exposed filter continues to show all the registered users.
I also tried putting in a User Reference field (to this content type) and attaching that to a relationship, but it didn't allow anything to show and gave this SQL warning:
SQLSTATE[42S22]: Column not found: 1054 Unknown column 'field_data_field_hidden_name.uid' in 'on clause'
How can I limit this author exposed filter to "ONLY" the users who have posted in this content type?