Fix UsersGroup specs

app/models/users_group.rb

@@ -18,7 +18,7 @@ class UsersGroup < ActiveRecord::Base
   attr_accessible :group_access, :user_id
 
   belongs_to :user
-  belongs_to :project
+  belongs_to :group
 
   scope :guests, -> { where(group_access: GUEST) }
   scope :reporters, -> { where(group_access: REPORTER) }

spec/models/users_group_spec.rb

@@ -13,10 +13,10 @@ describe UsersGroup do
   describe "Validation" do
     let!(:users_group) { create(:users_group) }
 
-    it { should validate_presence_of(:user) }
+    it { should validate_presence_of(:user_id) }
     it { should validate_uniqueness_of(:user_id).scoped_to(:group_id).with_message(/already exists/) }
 
-    it { should validate_presence_of(:group) }
+    it { should validate_presence_of(:group_id) }
     it { should ensure_inclusion_of(:group_access).in_array(UsersGroup.group_access_roles.values) }
   end