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"]
