A Script has a many-to-many relationship with a User. The User's name is part of the Script index.

I'm upgrading to thinking-sphinx 5.0.0. I've added:

ThinkingSphinx::Callbacks.append(self, behaviours: [:sql, :deltas])

to Script; works good, updates to Script trigger a delta job.

I'm having trouble making updates to User trigger deltas jobs for the associated Scripts. I've tried

ThinkingSphinx::Callbacks.append(self, :script, :behaviours => [:sql, :deltas]) {|instance| instance.scripts}

and

ThinkingSphinx::Callbacks.append(self, :script, :behaviours => [:sql, :deltas], :path => [:scripts])

in the User model - doesn't seem to do anything. How do I get this to work?