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

Another way of doing such filtering in newer version of active admin:

# app/admin/my_model.rb
filter :my_custom_filter,
as: :numeric,
label: 'Custom Filter',
filters: [:eq]

Then add following 2 functions in your model file

Your filtering logic:

def self.my_custom_filter_eq(value)
  where(column_1: value) # or probably a more complex query that uses the value inputted by the admin user
end

Registering new filter for Ransack

def self.ransackable_scopes(_auth_object = nil)
  %i(my_custom_filter_eq)
end