Rails 7.1 now delegates validate(_check)_constraint through change_table for bulk migrations by letting us define and validate check constraints within a single change_table block.

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Rails 7.1 introduces the ability to call validate_constraint and validate_check_constraint within a change_table block. Previously, these methods had to be invoked outside the block, requiring constraint creation and validation as separate steps. This enhancement allows developers to write cleaner migrations by combining column additions and constraint validations in a single change_table block.

Rails 7.1 allows passing validate(_check)_constraint through change_table