Dynamically setting the queryset of a ModelMultipleChoiceField to a custom recordset
- by Daniel Quinn
I've seen all the howtos about how you can set a ModelMultipleChoiceField to use a custom queryset and I've tried them and they work. However, they all use the same paradigm: the queryset is just a filtered list of the same objects.
In my case, I'm trying to get the admin to draw a multiselect form that instead of using usernames as the text portion of the , I'd like to use the name field from my account class.
Here's a breakdown of what I've got:
# models.py
class Account(models.Model):
name = models.CharField(max_length=128,help_text="A display name that people understand")
user = models.ForeignKey(User, unique=True) # Tied to the User class in settings.py
class Organisation(models.Model):
administrators = models.ManyToManyField(User)
# admin.py
from django.forms import ModelMultipleChoiceField
from django.contrib.auth.models import User
class OrganisationAdminForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
from ethico.accounts.models import Account
self.base_fields["administrators"] = ModelMultipleChoiceField(
queryset=User.objects.all(),
required=False
)
super(OrganisationAdminForm, self).__init__(*args, **kwargs)
class Meta:
model = Organisation
This works, however, I want queryset above to draw a selectbox with the Account.name property and the User.id property. This didn't work:
queryset=Account.objects.all().order_by("name").values_list("user","name")
It failed with this error:
'tuple' object has no attribute 'pk'
I figured that this would be easy, but it's turned into hours of dead-ends. Anyone care to shed some light?
