System check for default database values with expressions prohibits non-expressions

[Tim Graham]

Since its introduction in Django 5.0, ​the fields.E011 system check for database backends that have DatabaseFeatures.supports_expression_defaults = False ​requires literal defaults to be wrapped in Value.

There are a number of test models that have ​int, float and ​string db_defaults that will raise a system check error if DatabaseFeatures.supports_expression_defaults = False
since these models don't have required_db_features = {"supports_expression_defaults"}.

I'm working on MongoDB which doesn't support any database defaults, literal or expressions.

[Tim Graham]

I'm not sure if the appropriate solution is to add Value wrapping to all literal defaults in Django's test models or to modify the ​isinstance(db_default, Value) check to also accept int/float, str, etc.