Get all related Django model objects
Give this a try.
class A(models.Model):
def get_foreign_fields(self):
return [getattr(self, f.name) for f in self._meta.fields if type(f) == models.fields.related.ForeignKey]
@digitalPBK was close... here is probably what you are looking for using Django's built-in stuff that is used in Django admin for displaying related objects during deletion
from django.contrib.admin.utils import NestedObjects
collector = NestedObjects(using="default") #database name
collector.collect([objective]) #list of objects. single one won't do
print(collector.data)
this allows you to create what the Django admin displays - the related objects to be deleted.
Django <= 1.7
This gives you the property names for all related objects:
links = [rel.get_accessor_name() for rel in a._meta.get_all_related_objects()]
You can then use something like this to get all related objects:
for link in links:
objects = getattr(a, link).all()
for object in objects:
# do something with related object instance
I spent a while trying to figure this out so I could implement a kind of "Observer Pattern" on one of my models. Hope it's helpful.
Django 1.8+
Use _meta.get_fields()
: https://docs.djangoproject.com/en/1.10/ref/models/meta/#django.db.models.options.Options.get_fields (see reverse in the _get_fields()
source also)
The following is what django uses to get all related objects
from django.db.models.deletion import Collector
collector = Collector(using="default")
collector.collect([a])
print collector.data