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Changes between Version 2 and Version 3 of Ticket #34943, comment 3

v2	v3
33	33	---
34	34
35		My recommendation would be to introduce a `unique_constraint: str \| tuple[str \| Expression]` kwarg and deprecate `unique_fields`. When provided a `str` it would be a reference to a `UniqueConstraint` by `.name` and when it's a `tuple` it would be expected to be a index expression where `str` are resolved to field names. I guess the `str` -> `UniqueConstraint.name` part could be a distinct feature request.
	35	My recommendation would be to introduce a `unique_constraint: str \| tuple[str \| Expression]` kwarg and deprecate `unique_fields`. When provided a `str` it would be a reference to a `UniqueConstraint` by `.name` and when it's a `tuple` it would be expected to be a index expression where `str` are resolved to field names. I guess the `str` -> `UniqueConstraint.name` part could be a distinct feature request but it seems related to this issue given the only way Django supports creating unique constraints containing expressions is through `Meta.constaints`.