Issue with mypy, django-stubs and simple-history

[jlariza]

Good day,

We have a project that uses mypy to check the types across the project. MyPy's check was working with no issue. However, we installed simple_history and created an abstract class to add historical data to some of our models. This the class we defined:

class HistoricModel(models.Model):
    history = HistoricalRecords(inherit=True)
    class Meta:
        abstract = True

After we added it to some of our models, We started to get the following messages

Couldn't resolve related manager for relation '<MyModel>'

when running the mypy check.

The ones that show this message are models with a ForeignKey relationship to one of the models that is inherit from HistoricModel.

Why is this error appearing? How may we fix it or bypass it?

Thank you,

[macro1]

is this when accessing the related history records? or is django-simple-history interfering with other typing? would you be able to create an example project? i don't think i have enough of an understanding to suggest a way to bypass.

django-simple-history implements its own 'descriptor' (a Django internals concept) to make the history records available. descriptors are part of the magic django-stubs is doing bookkeeping for.. i imagine django-simple-history would need to somehow extend the descriptor typing mechanism for this to all work correctly together.