Django管理formfield爲多對多不工作

Question

我在讀這

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

，我試圖用like field查詢dtabase，但我得到的錯誤

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

我是uisng是代碼

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

該貼的代碼不會拋出這個呃ROR。如果您使用雙下劃線car__like，它只能混淆連接。 You should check out the django query reference for exact details.

反正，perhaps you are looking for __icontains它會產生一個LIKE語句嗎？

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