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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
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