db.models.Options.default_related_name

Options.default_related_name

The name that will be used by default for the relation from a related object back to this one. The default is <model_name>_set.

This option also sets related_query_name.

As the reverse name for a field should be unique, be careful if you intend to subclass your model. To work around name collisions, part of the name should contain '%(app_label)s' and '%(model_name)s', which are replaced respectively by the name of the application the model is in, and the name of the model, both lowercased. See the paragraph on related names for abstract models.

from django.db import models

class Foo(models.Model):
    pass

class Bar(models.Model):
    foo = models.ForeignKey(Foo)

    class Meta:
        default_related_name = 'bars'

>>> bar = Bar.objects.get(pk=1)
>>> # Using model name "bar" as lookup string is deprecated.
>>> Foo.objects.get(bar=bar)
>>> # You should use default_related_name "bars".
>>> Foo.objects.get(bars=bar)