Progress on dms, code cleanup

Progress on dms, code cleanup

app/serializers/rest/chat_message_serializer.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+class REST::ChatMessageSerializer < ActiveModel::Serializer
+  attributes :id, :text, :language, :from_account_id,
+             :chat_conversation_id, :created_at
+
+  def id
+    object.id.to_s
+  end
+end