add fields to model from another one related with OneToOneField or ForeignKey relation

问题:

i am new to django and i am using the 1.11 version
i have several models some related with foreign keys and some with oneToOne relation.
for instance the user and profile models, i would like to add in the profile form fields from the user form
how?
For the oneToOne, I have the an admin model with a oneToOne field related to the user model. but not just admin, i have several types of user (admin, writer, commetator, ...) each in a different model and when creating one type i also create its related user, so when i access the writer form in admin i create an admin but i also want to have user's model field so that i create both from the writer's form
in AdminAdmin ie: the admin model i would like to add the user's fields in the form showing in the admin template

from django.contrib import admin  from .models import User, Admin   class UserInline(admin.StackedInline):     model = User     fields = ['username', 'first_name', 'last_name']  class AdminAdmin(admin.ModelAdmin):     model = Admin     list_display = ['getUsername']     inlines = [UserInline]      def getUsername(self, obj):         return obj.user.username      getUsername.short_description = "Nom d'utilisateur"  admin.site.register(Admin, AdminAdmin) 

this code generates the error ": (admin.E202) 'common.User' has no ForeignKey to 'common.Admin'."

回答1:

With this setup:

Class A(models.Model):     # ...     nameField = models.CharField(max_length=100, ...)     # ...     pass  Class B(models.Model)     # ...     fk = models.ForeignKey(A)     # ...  Class C(models.Model):     # ...     oto = models.OneToOneKeyField(A) 

You cann access a realted model's field with the ForeignKey + __ + FieldName. E.g. you can access the model A's name field from related models with:

B

'fk__name'

C

'oto__name'

文章来源: add fields to model from another one related with OneToOneField or ForeignKey relation