Don't create event in Merge Request Create Service

1 files changed, 26 insertions, 0 deletions

diff --git a/db/post_migrate/20170815060945_remove_duplicate_mr_events.rb b/db/post_migrate/20170815060945_remove_duplicate_mr_events.rb
new file mode 100644
index 00000000000..6132b553177
--- /dev/null
+++ b/db/post_migrate/20170815060945_remove_duplicate_mr_events.rb
@@ -0,0 +1,26 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class RemoveDuplicateMrEvents < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+  DOWNTIME = false
+
+  class Event < ActiveRecord::Base
+    self.table_name = 'events'
+  end
+
+  def up
+    base_condition = "action = 1 AND target_type = 'MergeRequest' AND created_at > '2017-08-13'"
+    Event.select('target_id, count(*)')
+      .where(base_condition)
+      .group('target_id').having('count(*) > 1').each do |event|
+      duplicates = Event.where("#{base_condition} AND target_id = #{event.target_id}").pluck(:id)
+      duplicates.shift
+
+      Event.where(id: duplicates).delete_all
+    end
+  end
+
+  def down
+  end
+end