Not detecting Foreign key reverse relationship

[canassa]

Hello,

I couldn't get the reverse relationships to work, at first I thought that it's not supported but from browser other issues it seems that it's supported.

Here is an example based on my code:

class Transaction(models.Model):
    ...
    def test(self) -> None:
        print(self.transactionlog_set)

class TransactionLog(models.Model):
    ...
    transaction = models.ForeignKey(Transaction, on_delete=models.CASCADE)

This fails with error: "Transaction" has no attribute "transactionlog_set"

I also tried to add the related_name but it didn't help.

Thanks!

mypy==0.720
django-stubs==1.1.0

[mkurnikov]

I can't reproduce. Could you provide more info? Are those models in the same file, or in different ones?

Also, as always, make sure plugin is enabled in mypy.ini.

[canassa]

Yes, it's in the same file. This is my setup.cfg config:

[mypy]
python_version = 3.7
check_untyped_defs = True
ignore_errors = False
ignore_missing_imports = True
strict_optional = True
warn_unused_ignores = True
warn_redundant_casts = True
warn_unused_configs = True
disallow_untyped_defs = False
plugins =
    mypy_django_plugin.main

[mypy.plugins.django-stubs]
# specify settings module to use for django.conf.settings, this setting
# could also be specified with DJANGO_SETTINGS_MODULE environment variable
# (it also takes priority over config file)
django_settings_module = config.settings.local
ignore_missing_settings = True

[mypy-*.migrations.*]
ignore_errors = True

[canassa]

I will try to create a small project to reproduce the error

[canassa]

Okay, it works fine on a minimal project, so I guess it's something related to my project. I will investigate a bit more

[canassa]

I found the problem (sorry for the spam), my model has a custom manager:

class Transaction(models.Model):
    objects = TransactionQuerySet.as_manager()

and my manager runs like this:

class TransactionQuerySet(models.QuerySet):
    ....

[mkurnikov]

I still don't quite understand how custom manager could affect a ForeignKey relationship. Could you describe a bit more, or would you be able to provide a project / file to reproduce the issue?

[mkurnikov]

Nevermind, I can reproduce with

from django.db import models
class TransactionQuerySet(models.QuerySet):
    pass
class Transaction(models.Model):
    objects = TransactionQuerySet.as_manager()
    def test(self) -> None:
        self.transactionlog_set
class TransactionLog(models.Model):
    transaction = models.ForeignKey(Transaction, on_delete=models.CASCADE)

Thanks for the insight!