1 files changed, 17 insertions, 1 deletions
diff --git a/app/models/members/group_member.rb b/app/models/members/group_member.rb
index 2f13d339c89..204f34f0269 100644
--- a/app/models/members/group_member.rb
+++ b/app/models/members/group_member.rb
@@ -1,7 +1,7 @@
 class GroupMember < Member
   SOURCE_TYPE = 'Namespace'
 
-  belongs_to :group, class_name: 'Group', foreign_key: 'source_id'
+  belongs_to :group, foreign_key: 'source_id'
 
   # Make sure group member points only to group as it source
   default_value_for :source_type, SOURCE_TYPE
@@ -12,6 +12,22 @@ class GroupMember < Member
     Gitlab::Access.options_with_owner
   end
 
+  def self.access_levels
+    Gitlab::Access.sym_options_with_owner
+  end
+
+  def self.add_users_to_group(group, users, access_level, current_user: nil, expires_at: nil)
+    self.transaction do
+      add_users_to_source(
+        group,
+        users,
+        access_level,
+        current_user: current_user,
+        expires_at: expires_at
+      )
+    end
+  end
+
   def group
     source
   end