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# frozen_string_literal: true
class UpdateMergeRequestsIterationForeignKey < ActiveRecord::Migration[6.0]
include Gitlab::Database::MigrationHelpers
disable_ddl_transaction!
def up
with_lock_retries do
remove_foreign_key_if_exists(:merge_requests, column: :sprint_id)
end
add_concurrent_foreign_key(:merge_requests, :sprints, column: :sprint_id, on_delete: :nullify)
end
def down
with_lock_retries do
remove_foreign_key_if_exists(:merge_requests, column: :sprint_id)
end
add_concurrent_foreign_key(:merge_requests, :sprints, column: :sprint_id, on_delete: :cascade)
end
end
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