Merge branch 'pl-reactive-caching-primary_key' into 'master'

Enable caching for records which primary key is not `id`

See merge request gitlab-org/gitlab-ce!24245

app/models/ssh_host_key.rb

@@ -52,6 +52,11 @@ class SshHostKey
     @compare_host_keys = compare_host_keys
   end
+  # Needed for reactive caching
+  def self.primary_key
+    'id'
+  end
+
   def id
     [project.id, url].join(':')
   end

app/workers/reactive_caching_worker.rb

@@ -12,7 +12,7 @@ class ReactiveCachingWorker
     end
     return unless klass
-    klass.find_by(id: id).try(:exclusively_update_reactive_cache!, *args)
+    klass.find_by(klass.primary_key => id).try(:exclusively_update_reactive_cache!, *args)
   end
   # rubocop: enable CodeReuse/ActiveRecord
 end

changelogs/unreleased/pl-reactive-caching-primary_key.yml

+---
+title: Enable caching for records which primary key is not `id`
+merge_request: 24245
+author:
+type: fixed