1 files changed, 16 insertions, 0 deletions
diff --git a/lib/gitlab/database/read_only_relation.rb b/lib/gitlab/database/read_only_relation.rb
new file mode 100644
index 00000000000..4571ad122ce
--- /dev/null
+++ b/lib/gitlab/database/read_only_relation.rb
@@ -0,0 +1,16 @@
+module Gitlab
+  module Database
+    # Module that can be injected into a ActiveRecord::Relation to make it
+    # read-only.
+    module ReadOnlyRelation
+      [:delete, :delete_all, :update, :update_all].each do |method|
+        define_method(method) do |*args|
+          raise(
+            ActiveRecord::ReadOnlyRecord,
+            "This relation is marked as read-only"
+          )
+        end
+      end
+    end
+  end
+end