Django 。此函数的关键字参数无效。多对多

Question

我有这个错误:

'people' 是此函数的无效关键字参数

class Passage(models.Model):
    name= models.CharField(max_length = 255)
    who = models.ForeignKey(UserProfil)

class UserPassage(models.Model):
    passage = models.ForeignKey(Passage)
    people = models.ManyToManyField(UserProfil, null=True)

class UserProfil(models.Model):
    user = models.OneToOneField(User)
    name = models.CharField(max_length=50)

我尝试:

def join(request):
    user = request.user
    user_profil = UserProfil.objects.get(user=user)
    passage = Passage.objects.get(id=2)
    #line with error
    up = UserPassage.objects.create(people= user_profil, passage=passage)
    return render_to_response('thanks.html')

如何正确地做到这一点？谢谢!

Answer 1

您需要先保存/创建对象，然后才能添加 ManyToMany关系:

up = UserPassage.objects.create(passage=passage)
up.people.add(user_profil)

ManyToMany关系不会保存为表中的列。阅读这里的第一个回复以获得很好的解释:

Django ManyToMany field is not created in model

@DanielRoseman: Because a ManyToMany isn't a field, at least not one that exists as a database column. It's a relationship with a linking table. You'll find that a table named myapp_teacher_subjects has been created, with foreign keys to both teacher and subjects.