Can't reload ActiveRecord association from controller

Question

Spent a working day on this.

I have

class Box
  has_many :users, :through => :subscriptions
end

I also have custom insert_

Answer 1

So far I've been able to trick AR with the following:

def associate_with
  # mysql INSERT here
  @users = self.users.find(:all, :conditions => ['users.id IS NOT NULL'])
end

def users
  @users || self.users
end

Answer 2

You're seeing the effects of the ActiveRecord SQL query cache.

Either wrap the pre-INSERT references to the users association in a call to uncached

self.class.uncached do
  # ...
end

This will stop ActiveRecord from caching the results of any queries inside the block. If you have code in many places, this may be annoying.

You can also clear the cache after you are done with your inserts by calling connection.clear_query_cache.

Answer 3

The only way I've been able to fully clear the cache is to call reload. For example, you could call

User.reload

and it should force a cache clear including of any relations or associations.