Question

I have these models:

class UserProfile(models.Model):
    user = models.OneToOneField(User)
    #etc

class Organization(models.Model):
    users = models.ManyToManyField(User, through=OrganizationUser, verbose_name=_('users'))
    #etc

class OrganizationUser(models.Model):
    organization = models.ForeignKey('Organization')
    user = models.ForeignKey(User)

I want to show the organizations for an user with inline:

class UserOrganizationsInline(admin.TabularInline):
    model = OrganizationUser

class UserProfileAdmin(admin.ModelAdmin):
    inlines = [UserOrganizationsInline]

admin.site.register(UserProfile, UserProfileAdmin)

The error message is:

<class 'customer.models.organization.OrganizationUser'> has no ForeignKey to <class 'customer.models.userprofile.UserProfile'>

I know why: Organization has ForeignKey to auth.User instead of modes.UserProfile.

How can i make this work without changing the models.

Answer 1

Rough idea (untested): set the ForeignKey to UserProfile model but reflect the user_id field instead of primary key. So you’ll have relation to UserProfile with the same values in the database as now (User.id):

class OrganizationUser(models.Model):
    user = models.ForeignKey(UserProfile, to_field='user_id')