added a rails toggle class in order to make mongodb work

lib/impressionist/engine.rb

@@ -1,17 +1,10 @@
-require "impressionist"
-require "rails"
-
 module Impressionist
-  class Engine < Rails::Engine
+  class Engine < ::Rails::Engine
     attr_accessor :orm
 
-  def initialize
-    define_orm_type(Impressionist.orm)
-  end
-
   initializer 'impressionist.model' do |app|
-    require_and_include_orm
-
+    @orm = Impressionist.orm
+    include_orm
   end
 
 
@@ -26,22 +19,12 @@ def initialize
 
 
  private
-  def require_and_include_orm
-    require "#{root}/app/models/impressionist/impressionable.rb"
-    require "impressionist/models/#{orm}/impression.rb"
-    require "impressionist/models/#{orm}/impressionist/impressionable.rb"
-
-  end
-
-  def define_orm_type(str)
-    @orm = matcher(str.to_s)
-  end
-
-  def matcher(str)
-    matched = str.match(/active_record|mongo_mapper|mongoid|/)
-    matched[0]
-  end
 
+    def include_orm
+      require "#{root}/app/models/impressionist/impressionable.rb"
+      require "impressionist/models/#{orm}/impression.rb"
+      require "impressionist/models/#{orm}/impressionist/impressionable.rb"
+    end
 
   end
 end

lib/impressionist/load.rb

@@ -5,3 +5,6 @@
 require "impressionist/counter_cache"
 
 require "impressionist/update_counters"
+
+require "impressionist/rails_toggle"
+

lib/impressionist/models/mongoid/impression.rb

@@ -2,9 +2,7 @@ class Impression
   include Mongoid::Document
   include Mongoid::Timestamps
 
-  attr_accessible :impressionable_type, :impressionable_field, :impressionable_id, :user_id,
-  :controller_name, :action_name, :view_name, :request_hash, :ip_address,
-  :session_hash, :message, :referrer
+  include Impressionist::SetUpAssociation
 
   belongs_to :impressionable, polymorphic: true
 

lib/impressionist/rails_toggle.rb

@@ -1,5 +1,26 @@
 module Impressionist
+  # Responsability
+  # Toggles between rails > 3.1 < 4
+  # In order to make attr_accessible available in a rails app < 4
   class RailsToggle
 
+    attr_reader :r_version
+
+    def initialize(version)
+      @r_version = version.to_s 
+    end
+
+    # if Rails 4, it does not include attr_accessible
+    # and it returns false
+    def valid?
+      greater_than_4? ? false : true
+    end
+
+    private
+
+      def greater_than_4?
+        r_version == "4" ? true : false
+      end
+
   end
 end

lib/impressionist/set_up_association.rb

@@ -2,11 +2,25 @@ module Impressionist
   module SetUpAssociation
 
     def self.included(base)
+      # include attr_accessible base on
+      # rails version
+      should_include?
+      base.
+      belongs_to(:impressionable,:polymorphic => true)
+    end
+
+private
+
+    def self.should_include?
+      toggle = Impressionist::RailsToggle.new(Rails::VERSION::MAJOR)
+      self.include_attr_accessible unless toggle.valid?
+    end
+
+    def self.include_attr_accessible
       base.attr_accessible(:impressionable_type,:impressionable_id,
       :user_id,:controller_name,:action_name,:view_name,:request_hash,
       :ip_address,:session_hash,:message,:referrer)
 
-      base.belongs_to(:impressionable, :polymorphic => true)
     end
 
   end

tests/spec/rails_toggle_spec.rb

@@ -7,6 +7,32 @@
 module Impressionist
   describe RailsToggle do
 
+    describe "Rails 4" do
+      before do
+        @toggle = RailsToggle.new("4")
+      end
+
+      it "return current rails version" do
+        @toggle.r_version.must_equal "4"
+      end
+
+      it "must not load attr_accessible" do
+        @toggle.valid?.must_equal false
+      end
+
+    end
+
+    describe "Rails 3.1.x" do
+
+      before do
+        @toggle = RailsToggle.new("3")
+      end
+
+      it "includes" do
+         @toggle.valid?.must_equal true
+      end
+    end
+
   end
 
 end

tests/spec/test_helper.rb

@@ -1,3 +1,4 @@
 $:.unshift(File.dirname __FILE__)
 
 require "minitest/autorun"
+require "minitest/pride"

tests/test_app/Gemfile

@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gem 'rails', '3.2.12'
 
-gem 'impressionist', :path => '../'
+gem 'impressionist', :path => '../../'
 
 platforms :jruby do
   gem 'activerecord-jdbcsqlite3-adapter'
@@ -14,6 +14,8 @@ platforms :ruby, :mswin, :mingw do
   gem 'pg'
   gem 'sqlite3'
   gem 'mysql2'
+  gem "mongoid", "~> 3.1.4"
+  gem 'bson_ext'
 end
 
 gem 'json'
@@ -44,17 +46,3 @@ end
 
 gem 'jquery-rails'
 
-# To use ActiveModel has_secure_password
-# gem 'bcrypt-ruby', '~> 3.0.0'
-
-# To use Jbuilder templates for JSON
-# gem 'jbuilder'
-
-# Use unicorn as the app server
-# gem 'unicorn'
-
-# Deploy with Capistrano
-# gem 'capistrano'
-
-# To use debugger
-# gem 'ruby-debug'

tests/test_app/config/initializers/impression.rb

@@ -1,5 +1,2 @@
-# Use this hook to configure impressionist parameters
-Impressionist.setup do |config|
-  # Define ORM. Could be :active_record (default) and :mongo_mapper
-  # config.orm = :active_record
-end
+# Define ORM. Could be :active_record (default) and :mongo_mapper
+#Impressionist.config.orm = :mongoid