如何解决禁止直接分配给多对多集的正面改用emails_for_help.set（）？
你需要获取User对象，然后将其添加到emails_for_help字段中。ManyToManyField创建实例时，不能向其添加对象。看一下doc。
class Set_user(FormView):
template_name="pkm_templates/set_up_user.html"
form_class = Set_User_Form
success_url = '/thanks/'
def form_valid(self, form):
org = form.cleaned_data.get('organization')
emails = form.cleaned_data.get("share_email_with")
users = User.objects.filter(email__in=emails)
instance = Setupuser.objects.create(organization=org)
for user in users:
instance.emails_for_help.add(user)
return redirect("/")
编辑
这样做的另一种方法是使用.set()。
class Set_user(FormView):
template_name="pkm_templates/set_up_user.html"
form_class = Set_User_Form
success_url = '/thanks/'
def form_valid(self, form):
org = form.cleaned_data.get('organization')
emails = form.cleaned_data.get("share_email_with")
users = User.objects.filter(email__in=emails)
instance = Setupuser.objects.create(organization=org)
instance.emails_for_help.set(users)
return redirect("/")
或者，你可以简单地使用.add()添加任意数量的对象。
class Set_user(FormView):
template_name="pkm_templates/set_up_user.html"
form_class = Set_User_Form
success_url = '/thanks/'
def form_valid(self, form):
org = form.cleaned_data.get('organization')
emails = form.cleaned_data.get("share_email_with")
users = User.objects.filter(email__in=emails)
instance = Setupuser.objects.create(organization=org)
instance.emails_for_help.add(*users)
return redirect("/")
解决方法
我是Django的新手，但未找到有关此问题的任何参考。当我在Django模型（models.py）中使用多对多字段时，出现此错误。我猜问题是在views.pyform（forms.py）的view（）中分配m2m字段。
如何在视图中分配m2m字段？（Django version 2.0，python - 3.5）
models.py
class User(AbstractUser):
username=models.CharField(max_length=20)
email = models.EmailField(_('email address'),unique=True)
class Setupuser(models.Model):
organization=models.CharField(max_length=200,blank=False,null=True)
emails_for_help = models.ManyToManyField(User)
views.py
class Set_user(FormView):
template_name="pkm_templates/set_up_user.html"
form_class = Set_User_Form
success_url = '/thanks/'
def form_valid(self,form):
org = form.cleaned_data.get('organization')
emails = form.cleaned_data.get("emails_for_help")
instance = Setupuser(organization=org,emails_for_help=emails)
instance.save()
return redirect("/")
表格
class Set_User_Form(ModelForm):
emails_for_help = forms.ModelMultipleChoiceField(
queryset=User.objects.all(),widget=forms.CheckboxSelectMultiple
)
class Meta:
model = Setupuser
fields = ["organization","emails_for_help"]
声明：地推任务网所有作品（图片、文字）均由用户自行上传分享，仅供网友学习交流。
