^{Originally posted by arimeyer September 19, 2024}
On standard dataclasses there is a hash parameter on dataclasses.field: https://docs.python.org/3/library/dataclasses.html#module-contents . When trying to convert from SA 1.4 dataclasses to 2.0, I tried following:
https://docs.sqlalchemy.org/en/20/orm/dataclasses.html#attribute-configuration
https://docs.sqlalchemy.org/en/20/orm/mapping_api.html#sqlalchemy.orm.mapped_column

There was no mention about the "hash" parameter being specifically unsupported in mapped_column(), but when I add it to mirror my 1.4 code and set hash=False for certain fields, I get:
TypeError: init() got an unexpected keyword argument 'hash'

Was this deliberate? If so, what is the workaround?