Django admin site gives error on Djangae - django

Question

I have a Django app that works perfectly on google app engine, using the datastore via djangae. However, the admin site throws an error:
NotSupportedError at /admin/auth/user/5629499534213120/change/
Cross-join where filters are not supported on the Datastore
This error only occurs when trying to edit the default Django user model. Not sure why this is happening.
I have used the default Django user model. (this is an app dealing with donations for a nonprofit)
models.py:
from django.db import models
from django.contrib.auth.models import User
# Create your models here.
class FoodSplashUser(models.Model):
base_user = models.OneToOneField(User, on_delete=models.CASCADE)
address = models.TextField(null=True)
city = models.TextField(null=True)
state = models.CharField(max_length=4, null=True)
zip = models.CharField(max_length=10, null=True)
def __str__(self):
return str(self.base_user.username)
class Organization(models.Model):
base_user = models.OneToOneField(User, on_delete=models.CASCADE)
address = models.TextField(null=True)
city = models.TextField(null=True)
state = models.CharField(max_length=4, null=True)
zip = models.CharField(max_length=10, null=True)
description = models.TextField(null=True)
image_url = models.URLField(null=True)
def __str__(self):
return str(self.base_user.username)
class DonationRequest(models.Model):
organization = models.ForeignKey(Organization, on_delete=models.CASCADE)
timestamp = models.DateTimeField(auto_now=True)
request_type = models.TextField(null=True)
description = models.TextField(null=True)
def __str__(self):
return str(self.organization.base_user.username) + " " + self.request_type
class DonationPromise(models.Model):
user = models.ForeignKey(FoodSplashUser, on_delete=models.CASCADE)
donation_request = models.ForeignKey(DonationRequest, on_delete=models.CASCADE)
timestamp = models.DateTimeField(auto_now=True)
verified = models.BooleanField(default=False)
def __str__(self):
return str(self.user.base_user.username) + " " + str(self.donation_request)
This app goes with the default Django admin interface, but I decided to make the classes below for easy editing later.
admin.py:
from django.contrib import admin
from . import models
# Register your models here.
class FoodSplashUserAdmin(admin.ModelAdmin):
pass
class OrganizationAdmin(admin.ModelAdmin):
pass
class DonationRequestAdmin(admin.ModelAdmin):
pass
class DonationPromiseAdmin(admin.ModelAdmin):
pass
admin.site.register(models.FoodSplashUser, FoodSplashUserAdmin)
admin.site.register(models.Organization, OrganizationAdmin)
admin.site.register(models.DonationRequest, DonationPromiseAdmin)
admin.site.register(models.DonationPromise, DonationPromiseAdmin)

Answer 1

This may be a separate error, but :
admin.site.register(models.DonationRequest, DonationPromiseAdmin)
admin.site.register(models.DonationPromise, DonationPromiseAdmin)
Shouldn't that first one be: DonationRequestAdmin?

Answer 2

NotSupportedError indicates that your code performs an action that is not possible with App Engine Datastore. Not all the Django ORM features can be used in a non-relational database which Datastore is. You are trying to create an entity that has some relations, which causes the error. Probably it is a good idea to use Gauth for authentication and user management, as described in the Djangae docs.