新手在这里。我正在创建一个项目managemnet应用程序，其中有一群老师的权限与学生不同（更高）。这些学生按4人一组排列，每个学生组都分配了一位老师。那么如何将一个用户添加到2个不同的组中？
为创建组，我将用户分别添加到一个新组中。 每个老师都将自己注册到老师组中 因此，在添加指导者时，我尝试通过其名称获取一个组并使用.user_set.add（）
添加models.py
from django.db import models, transaction
from django.db.models.signals import post_save
from django.contrib.auth.models import AbstractUser, Group
from phonenumber_field.modelfields import PhoneNumberField
class Domain(models.Model):
name = models.CharField(max_length=30)
def __str__(self):
return self.name
class MyUser(AbstractUser):
is_student = models.BooleanField(default=False)
is_teacher = models.BooleanField(default=False)
phonenumber = PhoneNumberField()
class Teacher(models.Model):
user = models.OneToOneField(MyUser, on_delete=models.CASCADE, primary_key=True)
domain = models.ManyToManyField(Domain, related_name='interested_domains')
def __str__(self):
return self.user.username
class Student(models.Model):
user = models.OneToOneField(MyUser, on_delete=models.CASCADE, primary_key=True)
division = models.CharField(max_length=4, blank=True)
roll_no = models.IntegerField(blank=True)
def __str__(self):
return self.user.username
class GroupData(models.Model):
group = models.OneToOneField(Group,on_delete=models.CASCADE,primary_key=True)
domain = models.ManyToManyField(Domain,related_name='primary_domain')
def __str__(self):
return self.group.name
forms.py
class GroupCreateForm(forms.ModelForm):
user1 = forms.ModelChoiceField(queryset=MyUser.objects.filter(is_student=True), empty_label="(Choose a User)")
user2 = forms.ModelChoiceField(queryset=MyUser.objects.filter(is_student=True), empty_label="(Choose a User)")
user3 = forms.ModelChoiceField(queryset=MyUser.objects.filter(is_student=True), empty_label="(Choose a User)")
user4 = forms.ModelChoiceField(queryset=MyUser.objects.filter(is_student=True), empty_label="(Choose a User)")
domain = forms.ModelChoiceField(
queryset=Domain.objects.all(),
required=True,
empty_label="(Choose a Domain)"
)
class Meta:
model = Group
fields = ['name']
def save(self):
new_group, created = Group.objects.get_or_create(name=self.cleaned_data['name'])
new_group.user_set.add(self.cleaned_data['user1'])
new_group.user_set.add(self.cleaned_data['user2'])
new_group.user_set.add(self.cleaned_data['user3'])
new_group.user_set.add(self.cleaned_data['user4'])
group=GroupData.objects.create(group=new_group)
group.domain.add(self.cleaned_data.get('domain'))
return new_group
class AddMentorForm(forms.Form):
mentor = forms.ModelChoiceField(queryset=MyUser.objects.filter(is_teacher=True), empty_label="(Choose a User)")
name = forms.ModelChoiceField(queryset=Group.objects.all(),empty_label='(choose group)')
def save(self):
print(self.cleaned_data['name'])
print(self.cleaned_data['mentor'])
new_group,cleaned = Group.objects.get(name=self.cleaned_data['name'])
new_group.user_set.add(self.cleaned_data['mentor'])
return new_group
class TeacherForm(UserCreationForm):
phone = PhoneNumberField(widget=PhoneNumberPrefixWidget(attrs={'placeholder': 'Cellphone', 'class': "form-control"}),
label='Cellphone number',
required=True,
initial='+91')
password1 = forms.CharField(label='Password', widget=forms.PasswordInput)
password2 = forms.CharField(label='Password confirmation', widget=forms.PasswordInput)
domain = forms.ModelMultipleChoiceField(
queryset=Domain.objects.all(),
widget=forms.CheckboxSelectMultiple,
required=True,
)
class Meta:
model = MyUser
fields = ('first_name', 'last_name', 'email')
def clean_password2(self):
password1 = self.cleaned_data.get("password1")
password2 = self.cleaned_data.get("password2")
if password1 and password2 and password1 != password2:
raise forms.ValidationError("Passwords don't match")
return password2
@transaction.atomic
def save(self,commit=True):
user = super().save(commit=False)
user.is_teacher = True
user.is_active = False
user.username,_ = self.cleaned_data['email'].split('@')
user.first_name = self.cleaned_data['first_name']
user.last_name = self.cleaned_data['last_name']
user.phonenumber = self.cleaned_data['phone']
user.set_password(self.cleaned_data["password1"])
user.save()
new_group, created = Group.objects.get_or_create(name='teachers')
new_group.user_set.add(user)
teacher = Teacher.objects.create(user=user)
teacher.domain.add(*self.cleaned_data.get('domain'))
return user
views.py
class GroupCreateView(CreateView):
form_class = GroupCreateForm
template_name = './profiles/form.html'
success_url = reverse_lazy('home')
class TeacherSignUpView(CreateView):
form_class = TeacherForm
template_name = 'profiles/form.html'
model = Teacher
def get_context_data(self, **kwargs):
kwargs['user-type'] = 'teacher'
return super().get_context_data(**kwargs)
def form_valid(self, form):
user = form.save()
current_site = get_current_site(self.request)
subject = 'Activate POMAS account'
message = render_to_string('./profiles/account_activation_email.html', {
'user': user,
'domain': current_site.domain,
'uid': urlsafe_base64_encode(force_bytes(user.pk)).decode(),
'token': account_activation_token.make_token(user),
})
user.email_user(subject, message)
print(user.email_user(subject, message))
return redirect('account_activation_sent')
class AddMentorView(FormView):
template_name = './profiles/form.html'
form_class = AddMentorForm
success_url = reverse_lazy('home')
def form_valid(self, form):
print(self.request.user.groups.all())
req=form.save()
return redirect('home')
实际结果： Teacher1 => ['teachers'] //小组
预期结果： Teacher1 => ['teachers'，'grp1'，'grp2'，...] //组