ActiveAdminRelationshipFilters

This gem provides a few more filter options to ActiveAdmin allowing you to easily traverse relationships or filter on a HABTM.

Installation

Add this line to your application's Gemfile:

gem 'active_admin_relationship_filters'

And then execute:

$ bundle

Or install it yourself as:

$ gem install active_admin_relationship_filters

Usage

Multilevel Filter

Given the following scenario:

class Customer < ActiveRecord::Base
    belongs_to :customer_type
end

class CustomerType < ActiveRecord::Base
    has_many :customers
    belongs_to :region
end

class Region < ActiveRecord::Base
    has_many :customer_types, dependent: :destroy
end

ActiveAdmin.register Customer do
    filter :customer_type_region_id, as: :multilevel, collection: proc { Region.all }, label: "Region"
end

The above configuration would allow me to select one Region from a dropdown to filter my listing of Customer records by, respective to an attribute on another model (CustomerType)

HABTM Filter

Given the following scenario:

class View < ActiveRecord::Base
    has_and_belongs_to_many :items
end

class Item < ActiveRecord::Base
    has_and_belongs_to_many :views
end

ActiveRecord.register Item do
    filter :views_id, as: :habtm, collection: proc { View.all }
end

The above configuration would allow me to select one View from a dropdown to filter my listing of Item records by, for a HABTM relationship, while ActiveAdmin only supports belongs_to by default.

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request