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class AddForeignKeyOnPipelineScheduleOwner < ActiveRecord::Migration[4.2]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
def up
execute <<-SQL
UPDATE ci_pipeline_schedules
SET owner_id = NULL
WHERE NOT EXISTS (
SELECT true
FROM users
WHERE ci_pipeline_schedules.owner_id = users.id
)
SQL
add_concurrent_foreign_key(:ci_pipeline_schedules, :users, column: :owner_id, on_delete: on_delete)
end
def down
remove_foreign_key(:ci_pipeline_schedules, column: :owner_id)
end
private
def on_delete
if Gitlab::Database.mysql?
:nullify
else
'SET NULL'
end
end
end
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