开发笔记:访问Django中间模型组中的字段

我正在创建一个包含Person和Membership的Group模型，所有这些都在Django docs中描述。

class Person(models.Model):
name = models.CharField(max_length=128)
def __str__(self):
return self.name
class Group(models.Model):
name = models.CharField(max_length=128)
members = models.ManyToManyField(Person, through='Membership')
def __str__(self):
return self.name
class Membership(models.Model):
person = models.ForeignKey(Person)
leader = models.BooleanField(default=False)
group = models.ForeignKey(Group)


我只是在视图中完成所有这些，因为我想在我的网络应用程序中将此“创建组”作为一个功能。

views.朋友:

@login_required
def groups(request):
user = request.user
if request.method == "POST":
form = GroupForm(request.POST)
if form.is_valid():
formm = form.save(commit=False)
g = Group.objects.create(name = formm.name)
p = Person.objects.create(name=request.user)
m = Membership.objects.create(person=p, group=g, leader=True)
gr = Group.objects.all()
per = Person.objects.all()
mem = Membership.objects.all()
cOntext= {
'gr': gr,
'per':per,
'mem':mem,
'form': form,
}
return render(request, 'groups.html', context )
else:
gr = Group.objects.all()
per = Person.objects.all()
mem = Membership.objects.all()
form = GroupForm()
cOntext= {
'gr': gr,
'per':per,
'mem':mem,
'form': form,
}
return render(request, 'groups.html', context)


groups.html：

{% block profile %}


问题是我想要使用的时候

Membership.objects.filter(person=request.user)


并得到错误：

ValueError at /groups/
Cannot query "damian": Must be "Person" instance.


其中达米安是request.user的名字

我只想过滤这个以在模板中显示只选择的成员资格，组等...

有人知道怎么修这个东西吗？