Django admin formfield for manytomy不工作

Question

我在看这个

https://docs.djangoproject.com/en/1.5/ref/contrib/admin/#django.contrib.admin.ModelAdmin.formfield_for_manytomany

我试图用like field查询数据数据库，但是我得到了错误

FieldError: Join on field 'car' not permitted. Did you misspell 'like' for the lookup type?

我使用的代码是

def formfield_for_manytomany(self, db_field, request, **kwargs):
        if db_field.name == "cars":
            kwargs["queryset"] = models.Cars.objects.filter(car_like="ford")
        return super(MyAdmin, self).formfield_for_manytomany(db_field, request, **kwargs)

Answer 1

发布的代码不会抛出此错误。只有在使用双下划线car__like时，才会混淆联接。You should check out the django query reference for exact details.

不管怎样，perhaps you are looking for ^{}哪个生成LIKE语句？在

Foo.objects.filter(some_field__icontains='ford')