Add group_access validation to ProjectGroupLink

app/models/project_group_link.rb

@@ -16,14 +16,11 @@ class ProjectGroupLink < ActiveRecord::Base
   validates :project_id, presence: true
   validates :group_id, presence: true
   validates :group_id, uniqueness: { scope: [:project_id], message: "already shared with this group" }
+  validates :group_access, presence: true
+  validates :group_access, inclusion: { in: Gitlab::Access.values }, presence: true
 
   def self.access_options
-    {
-      "Guest"     => GUEST,
-      "Reporter"  => REPORTER,
-      "Developer" => DEVELOPER,
-      "Master"    => MASTER
-    }
+    Gitlab::Access.options
   end
 
   def self.default_access

spec/models/project_group_link_spec.rb

@@ -17,5 +17,6 @@ describe ProjectGroupLink do
     it { should validate_presence_of(:project_id) }
     it { should validate_uniqueness_of(:group_id).scoped_to(:project_id).with_message(/already shared/) }
     it { should validate_presence_of(:group_id) }
+    it { should validate_presence_of(:group_access) }
   end
 end