37 lines
868 B
Ruby
37 lines
868 B
Ruby
class RemoveEmptyForkNetworks < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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BATCH_SIZE = 10_000
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class MigrationForkNetwork < ActiveRecord::Base
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include EachBatch
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self.table_name = 'fork_networks'
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end
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class MigrationForkNetworkMembers < ActiveRecord::Base
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self.table_name = 'fork_network_members'
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end
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disable_ddl_transaction!
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def up
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say 'Deleting empty ForkNetworks in batches'
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has_members = MigrationForkNetworkMembers
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.where('fork_network_members.fork_network_id = fork_networks.id')
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.select(1)
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MigrationForkNetwork.where('NOT EXISTS (?)', has_members)
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.each_batch(of: BATCH_SIZE) do |networks|
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deleted = networks.delete_all
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say "Deleted #{deleted} rows in batch"
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end
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end
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def down
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# nothing
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end
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end
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