Explicitly define and require dependencies

lib/ransack.rb

@@ -1,3 +1,5 @@
+require 'active_support/core_ext'
+
 require 'ransack/configuration'
 
 module Ransack

lib/ransack/translate.rb

@@ -1,3 +1,5 @@
+require 'i18n'
+
 I18n.load_path += Dir[File.join(File.dirname(__FILE__), 'locale', '*.yml')]
 
 module Ransack

ransack.gemspec

@@ -15,8 +15,10 @@ Gem::Specification.new do |s|
 
   s.rubyforge_project = "ransack"
 
-  s.add_dependency 'activerecord', '>= 4.0.0'
-  s.add_dependency 'actionpack', '>= 4.0.0'
+  s.add_dependency 'actionpack', '>= 4.0'
+  s.add_dependency 'activerecord', '>= 4.0'
+  s.add_dependency 'activesupport', '>= 4.0'
+  s.add_dependency 'i18n'
   s.add_dependency 'polyamorous', '~> 0.6.0'
   s.add_development_dependency 'rspec', '~> 2.8.0'
   s.add_development_dependency 'machinist', '~> 1.0.6'

spec/ransack/dependencies_spec.rb

@@ -0,0 +1,6 @@
+describe 'Ransack' do
+  it 'can be required without errors' do
+    output = `bundle exec ruby -e "require 'ransack'" 2>&1`
+    output.should be_empty
+  end
+end