Add support for Active Admin 3.0

.github/workflows/tests.yml

@@ -23,6 +23,8 @@ jobs:
         include:
           - ruby-version: '3.0'
             gemfile: gemfiles/rails_6.x_active_admin_2.x.gemfile
+          - ruby-version: '3.0'
+            gemfile: gemfiles/rails_6.x_active_admin_3.x.gemfile
 
     env:
       BUNDLE_GEMFILE: ${{ matrix.gemfile }}

Appraisals

@@ -16,4 +16,9 @@ end
 appraise 'rails-6.x-active-admin-2.x' do
   gem 'rails', '~> 6.1'
   gem 'activeadmin', '~> 2.0'
-end
+end
+
+appraise 'rails-6.x-active-admin-3.x' do
+  gem 'rails', '~> 6.1'
+  gem 'activeadmin', '~> 3.0'
+end

activeadmin-searchable_select.gemspec

@@ -35,7 +35,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'semmy', '~> 1.0'
   spec.add_development_dependency 'sprockets', '~> 3.7'
 
-  spec.add_runtime_dependency 'activeadmin', ['>= 1.x', '< 3']
+  spec.add_runtime_dependency 'activeadmin', ['>= 1.x', '< 4']
   spec.add_runtime_dependency 'jquery-rails', ['>= 3.0', '< 5']
   spec.add_runtime_dependency 'select2-rails', '~> 4.0'
 end

gemfiles/rails_6.x_active_admin_3.x.gemfile

@@ -0,0 +1,9 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "sass-rails"
+gem "rails", "~> 6.1"
+gem "activeadmin", "~> 3.0"
+
+gemspec path: "../"

spec/support/models.rb

@@ -4,13 +4,21 @@ class User < ActiveRecord::Base; end
 
 class Category < ActiveRecord::Base
   belongs_to :created_by, class_name: 'User'
+
+  def self.ransackable_attributes(_auth_object = nil)
+    ['name']
+  end
 end
 
 class Post < ActiveRecord::Base
   belongs_to :category
   belongs_to :user
 
   scope(:published, -> { where(published: true) })
+
+  def self.ransackable_attributes(_auth_object = nil)
+    %w(category_id title)
+  end
 end
 
 module RGB
@@ -24,13 +32,21 @@ module Internal
   class TagName < ActiveRecord::Base
     self.table_name = :internal_tag_names
     belongs_to :color, class_name: 'RGB::Color', foreign_key: :color_id
+
+    def self.ransackable_attributes(_auth_object = nil)
+      ['color_id']
+    end
   end
 end
 
 class OptionType < ActiveRecord::Base; end
 
 class OptionValue < ActiveRecord::Base
   belongs_to :option_type
+
+  def self.ransackable_attributes(_auth_object = nil)
+    ['value']
+  end
 end
 
 class Product < ActiveRecord::Base