Add a migration to populate fork networks

This uses the existing ForkedProjectLinks

1 files changed, 30 insertions, 0 deletions

diff --git a/db/migrate/20170929131201_populate_fork_networks.rb b/db/migrate/20170929131201_populate_fork_networks.rb
new file mode 100644
index 00000000000..1214962770f
--- /dev/null
+++ b/db/migrate/20170929131201_populate_fork_networks.rb
@@ -0,0 +1,30 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class PopulateForkNetworks < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  MIGRATION = 'PopulateForkNetworksRange'.freeze
+  BATCH_SIZE = 100
+  DELAY_INTERVAL = 15.seconds
+
+  disable_ddl_transaction!
+
+  class ForkedProjectLink < ActiveRecord::Base
+    include EachBatch
+
+    self.table_name = 'forked_project_links'
+  end
+
+  def up
+    say 'Populating the `fork_networks` based on existing `forked_project_links`'
+
+    queue_background_migration_jobs_by_range_at_intervals(ForkedProjectLink, MIGRATION, DELAY_INTERVAL, batch_size: BATCH_SIZE)
+  end
+
+  def down
+    # nothing
+  end
+end