1 files changed, 23 insertions, 0 deletions
diff --git a/app/graphql/types/issuable_type.rb b/app/graphql/types/issuable_type.rb
new file mode 100644
index 00000000000..fc57491bb59
--- /dev/null
+++ b/app/graphql/types/issuable_type.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module Types
+  class IssuableType < BaseUnion
+    graphql_name 'Issuable'
+    description 'Represents an issuable.'
+
+    possible_types Types::IssueType, Types::MergeRequestType
+
+    def self.resolve_type(object, context)
+      case object
+      when Issue
+        Types::IssueType
+      when MergeRequest
+        Types::MergeRequestType
+      else
+        raise 'Unsupported issuable type'
+      end
+    end
+  end
+end
+
+Types::IssuableType.prepend_if_ee('::EE::Types::IssuableType')