Cascading custom filter on ActiveAdmin

Question

I am trying to create a cascading filter on ActiveAdmin, and I am not quite sure how to go about it.

I have three models that have successive belongs_to/has_many relationships, eg A has many B's, and B has many C's.

I can create three filters like the following, and they work, but what I want to do is to limit B collection based on choice in A.

  filter :b_a_name, :as => :select, :collection => A.map(&:name)
  filter :b_name, :as => :select, :collection => B.map(&:name)
  filter :year

Is there anyway to accomplish this on ActiveAdmin?

Thank for help in advance!

Answer 1

You can accomplish something like this using javascript, ie

• Listen to the change event on b_a_name
• Make an ajax request to an endpoint with the selection in b_a_name with
• Return an JSON array of the corresponding options for b_name in your success callback
• Replace the select options for b_name with options in array