Add explicit primary key declaration for changeset subscriptions

This table has a composite primary key and although we don't really
rely on that at all rails 5.0 warns about itif you don't explcitly
declare it in order to trigger the CPK extension.

diff --git a/app/models/diary_entry_subscription.rb b/app/models/diary_entry_subscription.rb
index b0a563ea866dcd74b0ee583da874d423216dff0c..8b96f60743fbedd5ca1b4acda887d248c0dce86e 100644 (file)
--- a/app/models/diary_entry_subscription.rb
+++ b/app/models/diary_entry_subscription.rb
@@ -1,4 +1,6 @@
 class DiaryEntrySubscription < ActiveRecord::Base
+  self.primary_keys = "user_id", "diary_entry_id"
+
   belongs_to :user
   belongs_to :diary_entry
 end