Hi all, let me express my question more simple and easy to understand.As we know we can access the manager B through A as the following:
>>> manager_of_b = a.b_set # get the manager of B >>> queryset_b = manager_of_b.all() # get all instance of B now how can I access the manager of A through class B? e,g I want to: >>> manager_of_a = B.some_api_i_dont_know >>> queryset_a = manager_of_a.all() Any idea ? On Dec 3, 6:39 pm, John Wang <[email protected]> wrote: > Hi all, > > Given the following simple models: > > from django.db import models > > class A(models.Model): > att=models.CharField(max_length=256) > > class B(models.Model): > fk = models.ForeignKey(A) > > My question is , if I have a variable of B class, how can I know what > is the model its 'fk' is refering to at runtime ? > > Acctually I want do something like the following: > > >>> b = B > >>> fk = [ f for f in b._meta.fields if f.get_internal_type()=="ForeignKey" > >>> ][0] # find the foreign key field at runtime > >>> queryset_of_a = fk.datamanager_of_A.all() # I know this is wrong. here i > >>> just want to show what i want: get the queryset of A class at runtime > >>> from the B side. what is the correct way ? -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
