ArrayField in admin inline form try to save null instead default value

[Irina Silvestrova]

I have buit-in User class and the Employee class, one-to-one with User. It has an ArrayField inside:

role = ArrayField(
    models.IntegerField(choices=UserRole.choices(), blank=True, null=True),
    verbose_name='User Roles', blank=True, default=list
)

It is not nullable, but has default value.

In admin, I have the class EmployeeInline:

class EmployeeInline(admin.StackedInline):
    model = models.Employee
    can_delete = False
    verbose_name_plural = 'employee'

And use it in the UserAdmin class in the following way:

@admin.register(models.User)
class UserAdmin(DefaultUserAdmin):
    def change_view(self, request, object_id, form_url='', extra_context=None):
        self.inlines = [EmployeeInline]
        return super(UserAdmin, self).change_view(
            request, object_id, form_url, extra_context
        )

I see role field correct on the admin page, but if I try to save the model without selected role, I have an error:

IntegrityError at /admin/auth/user/232/change/

null value in column "role" violates not-null constraint
DETAIL:  Failing row contains (232, , 232, , , , 31, t, f, null, null).

[Tim Graham]

What version of Django are you using? Does the problem happen in non-inline forms? I can't reproduce the issue there and I didn't try the complete steps you offered.

[Tim Graham]

I tried to reproduce this and couldn't do so. The details are somewhat sparse, perhaps you might provide a sample project.