How to add custom filter to Active Admin?

Question

Active Admin allows me to define filters that are displayed on the index page like so:

ActiveAdmin.register Promo do

  filter :name
  filter :address
  filt         


        

Answer 1

To use a custom filter, you can create a scope function and add it as search_methods in the model.

For example, on my User model:

search_methods :role_eq
scope :role_eq, -> (role) { where("? LIKE ANY(roles)", role) }

Then in users.rb, I can use my scope as a custom filter:

filter :role, label: "Roles", as: :select, collection: %w[ student teacher parent ]