Create Approve model for merge request

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/models/approve.rb

+class Approve < ActiveRecord::Base
+  belongs_to :user
+  belongs_to :merge_request
+end

app/models/merge_request.rb

@@ -35,6 +35,7 @@ class MergeRequest < ActiveRecord::Base
   belongs_to :source_project, foreign_key: :source_project_id, class_name: "Project"
 
   has_one :merge_request_diff, dependent: :destroy
+  has_many :approves, dependent: :destroy
 
   after_create :create_merge_request_diff
   after_update :update_merge_request_diff

app/models/user.rb

@@ -130,6 +130,7 @@ class User < ActiveRecord::Base
   has_many :assigned_issues,          dependent: :destroy, foreign_key: :assignee_id, class_name: "Issue"
   has_many :assigned_merge_requests,  dependent: :destroy, foreign_key: :assignee_id, class_name: "MergeRequest"
   has_many :oauth_applications, class_name: 'Doorkeeper::Application', as: :owner, dependent: :destroy
+  has_many :approves, dependent: :destroy
 
 
   #

db/migrate/20150609113337_create_approves.rb

+class CreateApproves < ActiveRecord::Migration
+  def change
+    create_table :approves do |t|
+      t.integer :merge_request_id, null: false
+      t.integer :user_id, null: false
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150529150354) do
+ActiveRecord::Schema.define(version: 20150609113337) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -49,6 +49,13 @@ ActiveRecord::Schema.define(version: 20150529150354) do
     t.string   "after_sign_out_path"
   end
 
+  create_table "approves", force: true do |t|
+    t.integer  "merge_request_id", null: false
+    t.integer  "user_id",          null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
   create_table "audit_events", force: true do |t|
     t.integer  "author_id",   null: false
     t.string   "type",        null: false

spec/factories/approves.rb

+# Read about factories at https://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :approve, class: 'Approve' do
+    merge_request
+    user
+  end
+end

spec/models/approve_spec.rb

+require 'spec_helper'
+
+describe Approve do
+  subject { create(:approve) }
+
+  it { should be_valid }
+end