diff options
Diffstat (limited to 'db/post_migrate/20171114104051_remove_empty_fork_networks.rb')
-rw-r--r-- | db/post_migrate/20171114104051_remove_empty_fork_networks.rb | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/db/post_migrate/20171114104051_remove_empty_fork_networks.rb b/db/post_migrate/20171114104051_remove_empty_fork_networks.rb new file mode 100644 index 00000000000..2fe99a1b9c1 --- /dev/null +++ b/db/post_migrate/20171114104051_remove_empty_fork_networks.rb @@ -0,0 +1,36 @@ +class RemoveEmptyForkNetworks < ActiveRecord::Migration + include Gitlab::Database::MigrationHelpers + + DOWNTIME = false + BATCH_SIZE = 10_000 + + class MigrationForkNetwork < ActiveRecord::Base + include EachBatch + + self.table_name = 'fork_networks' + end + + class MigrationForkNetworkMembers < ActiveRecord::Base + self.table_name = 'fork_network_members' + end + + disable_ddl_transaction! + + def up + say 'Deleting empty ForkNetworks in batches' + + has_members = MigrationForkNetworkMembers + .where('fork_network_members.fork_network_id = fork_networks.id') + .select(1) + MigrationForkNetwork.where('NOT EXISTS (?)', has_members) + .each_batch(of: BATCH_SIZE) do |networks| + deleted = networks.delete_all + + say "Deleted #{deleted} rows in batch" + end + end + + def down + # nothing + end +end |