id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
35580	System check fields.E300 does not allow for related fields involving auto_created through models.	Jason Bruce	Jason Bruce	"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."	Bug	closed	Database layer (models, ORM)	5.1	Normal	fixed		Jason Bruce Simon Charette	Ready for checkin	1	0	0	0	1	0