Django admin list edit

Question

I encountered some weird behavior when using admin list_editable with a restricting custom manager. Each time I am trying to save list changes in admin, I get the message: Please correct the errors below.

Any suggestions on how to get rid of this error message?

Here is a minimal sample:

models.py

from django.db import models

class RestrictedManager(models.Manager):
    def get_queryset(self):
        return super(RestrictedManager, self).get_queryset().none()


class MyModel(models.Model):
    on = models.BooleanField()

    objects = RestrictedManager()
    all_objects = models.Manager()

admin.py

from django.contrib.admin import ModelAdmin, site
from models import MyModel

class MyModelAdmin(ModelAdmin):
    list_editable = ('on',)
    list_display = ('id', 'on',)

    def get_queryset(self, request):
        return MyModel.all_objects

site.register(MyModel, MyModelAdmin)

If you wonder, why am I using a none() default queryset, I don't. I used none() only to simplify the example. The issue occurs with any object filtered out by the default manager.

Answer 1

I didn't tested this yet, but probably the problem is, that you've overridden the default manager.

From the Django docs: Default managers

If you use custom Manager objects, take note that the first Manager Django encounters (in the order in which they’re defined in the model) has a special status. Django interprets the first Manager defined in a class as the “default” Manager, and several parts of Django (including dumpdata) will use that Manager exclusively for that model. As a result, it’s a good idea to be careful in your choice of default manager in order to avoid a situation where overriding get_queryset() results in an inability to retrieve objects you’d like to work with.

So using your "UnrestrictedManager" first and your Custom Manager as second should do the trick.