Migration which fixes cross-project label references

2 files changed, 31 insertions, 1 deletions

diff --git a/db/post_migrate/20180702120647_enqueue_fix_cross_project_label_links.rb b/db/post_migrate/20180702120647_enqueue_fix_cross_project_label_links.rb
new file mode 100644
index 00000000000..59aa41adede
--- /dev/null
+++ b/db/post_migrate/20180702120647_enqueue_fix_cross_project_label_links.rb
@@ -0,0 +1,30 @@
+class EnqueueFixCrossProjectLabelLinks < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  BATCH_SIZE = 100
+  MIGRATION = 'FixCrossProjectLabelLinks'
+  DELAY_INTERVAL = 5.minutes
+
+  disable_ddl_transaction!
+
+  class Label < ActiveRecord::Base
+    self.table_name = 'labels'
+  end
+
+  class Namespace < ActiveRecord::Base
+    self.table_name = 'namespaces'
+
+    include ::EachBatch
+
+    default_scope { where(type: 'Group', id: Label.where(type: 'GroupLabel').select('distinct group_id')) }
+  end
+
+  def up
+    queue_background_migration_jobs_by_range_at_intervals(Namespace, MIGRATION, DELAY_INTERVAL, batch_size: BATCH_SIZE)
+  end
+
+  def down
+    # noop
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 384a1ec6d37..ea355921bcf 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20180629191052) do
+ActiveRecord::Schema.define(version: 20180702120647) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"