2017-08-17 22:00:37 +05:30
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# rubocop:disable RemoveIndex
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2018-12-23 12:14:25 +05:30
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class AddUniqueIndexToSubscriptions < ActiveRecord::Migration[4.2]
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2017-08-17 22:00:37 +05:30
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = true
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DOWNTIME_REASON = 'This migration requires downtime because it changes a column to not accept null values.'
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disable_ddl_transaction!
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def up
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add_concurrent_index :subscriptions, [:subscribable_id, :subscribable_type, :user_id, :project_id], { unique: true, name: 'index_subscriptions_on_subscribable_and_user_id_and_project_id' }
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remove_index :subscriptions, name: 'subscriptions_user_id_and_ref_fields' if index_name_exists?(:subscriptions, 'subscriptions_user_id_and_ref_fields', false)
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end
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def down
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add_concurrent_index :subscriptions, [:subscribable_id, :subscribable_type, :user_id], { unique: true, name: 'subscriptions_user_id_and_ref_fields' }
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remove_index :subscriptions, name: 'index_subscriptions_on_subscribable_and_user_id_and_project_id' if index_name_exists?(:subscriptions, 'index_subscriptions_on_subscribable_and_user_id_and_project_id', false)
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end
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end
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