Explicitly say approve class name in association

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

app/models/merge_request.rb

@@ -35,7 +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
+  has_many :approves, class_name: 'Approve', dependent: :destroy
 
   after_create :create_merge_request_diff
   after_update :update_merge_request_diff

app/models/user.rb

@@ -130,7 +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
+  has_many :approves, class_name: 'Approve', dependent: :destroy
 
 
   #

spec/factories/approves.rb

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