filtering dropdown values in django admin

Question

class Foo(models.Model):
    title = models.TextField()
    userid = models.IntegerField()
    image = models.CharField(max_length=100)
    def __unicode__(self):
           


        

Answer 1

You could subclass your own model.ModelAdmin and create a custom field for your ChoiceField...

class CustomForm(model.ModelForm):

    class Meta:
        model = Foo

    foo = forms.ChoiceField(widget=forms.Select, initial=self.foo_queryset)

    def foo_queryset(self):
        return Foo.objects.filter(xy)...

class FooAdmin(model.ModelAdmin):
    form = CustomForm

Answer 2

You can provide your own form for ModelAdmin, with custom queryset for foo field.

from django import forms
from django.contrib import admin

#Create custom form with specific queryset:
class CustomBarModelForm(forms.ModelForm):
    class Meta:
        model = Bar
        fields = '__all__'

    def __init__(self, *args, **kwargs):
        super(CustomBarModelForm, self).__init__(*args, **kwargs)
        self.fields['foo'].queryset = Foo.objects.filter(title__isnull=False)# or something else

# Use it in your modelAdmin
class BarAdmin(admin.ModelAdmin):
    form = CustomBarModelForm

Something like this...

docs

Answer 3

I stumbled across this question when looking for a solution to filter dropdown options on the fly in the admin interface based on the selection in another field -- not based on a pre-filtered list at page load. The solution I found was this library: https://github.com/digi604/django-smart-selects which is an app that uses ajax calls and allows chain filtering to multiple levels. Works like a charm for me. -HTH

Answer 4

for django 1.6:

For foreign key: https://docs.djangoproject.com/en/1.6/ref/contrib/admin/#ModelAdmin.formfield_for_foreignkey

class MyModelAdmin(admin.ModelAdmin):
def formfield_for_foreignkey(self, db_field, request, **kwargs):
    if db_field.name == "title":
        kwargs["queryset"] = Foo.objects.filter(title__isnull=False)
    return super(MyModelAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)