#35580: System check fields.E300 does not allow for related fields involving
auto_created through models.
-------------------------------------+-------------------------------------
Reporter: brucejwb | Type: Bug
Status: new | Component: Database
| layer (models, ORM)
Version: 5.1 | Severity: Normal
Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 1 | UI/UX: 0
-------------------------------------+-------------------------------------
The model system checks will raise the fields.E300 error if you make an
auto_created through model the target of a related field. Here is an
example of models that will trigger this error:
{{{
class E300TestModelA(models.Model):
pass
class E300TestModelB(models.Model):
many_to_many_rel = models.ManyToManyField(E300TestModelA)
class E300TestModelC(models.Model):
one_to_one_rel =
models.OneToOneField("check_framework.E300TestModelB_many_to_many_rel",
on_delete=models.CASCADE)
}}}
I realize this might be an unusual thing to do, however I have a use case
that requires this and thought I would create this ticket in case others
agree that this should be changed. I will create a pull request shortly.
--
Ticket URL: <https://code.djangoproject.com/ticket/35580>
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