1 files changed, 8 insertions, 0 deletions
diff --git a/app/graphql/types/notes/discussion_type.rb b/app/graphql/types/notes/discussion_type.rb
index c4691942f2d..a3fb28298f6 100644
--- a/app/graphql/types/notes/discussion_type.rb
+++ b/app/graphql/types/notes/discussion_type.rb
@@ -8,8 +8,16 @@ module Types
       authorize :read_note
 
       field :id, GraphQL::ID_TYPE, null: false
+      field :reply_id, GraphQL::ID_TYPE, null: false, description: 'The ID used to reply to this discussion'
       field :created_at, Types::TimeType, null: false
       field :notes, Types::Notes::NoteType.connection_type, null: false, description: "All notes in the discussion"
+
+      # The gem we use to generate Global IDs is hard-coded to work with
+      # `id` properties. To generate a GID for the `reply_id` property,
+      # we must use the ::Gitlab::GlobalId module.
+      def reply_id
+        ::Gitlab::GlobalId.build(object, id: object.reply_id)
+      end
     end
   end
 end