Changed from habtm to has_many though

Author: Rogelio Guzman

app/models/ruby_gem.rb

@@ -1,5 +1,8 @@
 class RubyGem < ActiveRecord::Base
-  has_and_belongs_to_many :tutorials
+  # has_and_belongs_to_many :tutorials
+  has_many :ruby_gem_tutorials, dependent: :destroy
+  has_many :tutorials, through: :ruby_gem_tutorials
+
   serialize :info, Hash
   before_create :set_info
 

app/models/ruby_gem_tutorial.rb

@@ -0,0 +1,4 @@
+class RubyGemTutorial < ActiveRecord::Base
+  belongs_to :ruby_gem
+  belongs_to :tutorial
+end

app/models/tutorial.rb

@@ -3,9 +3,12 @@ class Tutorial < ActiveRecord::Base
   attr_accessible :title, :body, :user_id, :ruby_gem_tokens, :estimated_time, :source_code, :repo_link
 
   acts_as_markdown :body
+
+  # has_and_belongs_to_many :ruby_gems
+  has_many :ruby_gem_tutorials, dependent: :destroy
+  has_many :ruby_gems, through: :ruby_gem_tutorials
 
   belongs_to :user, counter_cache: true
-  has_and_belongs_to_many :ruby_gems
   has_many :points, :dependent => :destroy
   attr_reader :ruby_gem_tokens
 

db/migrate/20120126175716_create_ruby_gem_tutorials.rb

@@ -0,0 +1,12 @@
+class CreateRubyGemTutorials < ActiveRecord::Migration
+  def change
+    create_table :ruby_gem_tutorials do |t|
+      t.integer :tutorial_id
+      t.integer :ruby_gem_id
+
+      t.timestamps
+
+    end
+    add_index :ruby_gem_tutorials, [:ruby_gem_id, :tutorial_id]
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20120126172256) do
+ActiveRecord::Schema.define(:version => 20120126175716) do
 
   create_table "authentications", :force => true do |t|
     t.integer  "user_id"
@@ -28,6 +28,15 @@
     t.datetime "updated_at"
   end
 
+  create_table "ruby_gem_tutorials", :force => true do |t|
+    t.integer  "tutorial_id"
+    t.integer  "ruby_gem_id"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
+  add_index "ruby_gem_tutorials", ["ruby_gem_id", "tutorial_id"], :name => "index_ruby_gem_tutorials_on_ruby_gem_id_and_tutorial_id"
+
   create_table "ruby_gems", :force => true do |t|
     t.string   "name"
     t.datetime "created_at"

spec/models/ruby_gem_tutorial_spec.rb

@@ -0,0 +1,5 @@
+require 'spec_helper'
+
+describe RubyGemTutorial do
+  pending "add some examples to (or delete) #{__FILE__}"
+end