How to fix Ransack undefined method "_eq", when using ActiveAdmin with ":through" relationships in your model?
activeadmin, ransack, ruby-on-rails, ruby-on-rails-4
Solution
I found the answer right here : undefined method `users_user_id_eq' for Ransack::Search
There is also a post here : weird error popped up with active admin that looks to be the same problem description.
It seems that Ransack (used by ActiveAdmin) do not like `has many .. :through` relationships.
Example :
If you have a `user.rb` that `has many :roles, :through => :user_roles`
This will give you the error : `undefined method user_roles_id_eq`
To fix (not really fix.. but avoid to get an error) the bug, edit your "ActiveAdmin.register User" file, and add : `remove_filter :user_roles`
Problem
I have a Rails 4.0.1 application, using gems activeadmin 1.0.0.pre and ransack 1.1.0. Using ActiveAdmin, I have many errors like this one : ``` NoMethodError in Admin::MyModel#action Showing [...]/views/active_admin/resource/action.html.arb where line #1 raised: undefined method `applied_boundaries_id_eq' for #<Ransack::Search:0x0..> Extracted source (around line #1): insert_tag renderer_for(:index) ``` There is a pattern "_eq" for each undefined method : ``` aws_instance_type_clients_id_eq user_roles_id_eq ``` Any idea ?