（Django）無法分配“u'1”：“StaffProfile.user”必須是“用戶”實例

Question

我有一個如下模型：

class StaffProfile(models.Model):
    user = models.ForeignKey(User)
    maas = models.FloatField()
    maas_gunu = models.CharField(max_length=5)

當我嘗試使用如下代碼插入數據時：

staffprofilesay = StaffProfile.objects.filter(user = user_id).count()

     if staffprofilesay > 0:
        staffprofile = StaffProfile.objects.get(user = user_id)
     else:    
        staffprofile = StaffProfile()

     staffprofile.user = user_id
     staffprofile.maas = calisan_formu.cleaned_data["maas"]
     staffprofile.maas_gunu = calisan_formu.cleaned_data["maas_gunu"]
     staffprofile.save()

我收到這樣的錯誤：

Cannot assign "u'1'": "StaffProfile.user" must be a "User" instance.

我應該做些什么？

PS：我正在使用Django的用戶模型

Answer 1

您需要分配一個User對象，例如

from django.contrib.auth.models import User
user = User.objects.get(id=user_id)

staffprofile.user = user

Answer 2

user需要是User模型的實例，而不是unicode對象（這是您傳遞的對象）。