我有一个名为“service”的字段。它存储了一个int列表，代表公司提供的服务（1=会计，2=HR等）。一旦列表保存到“service”字段，我希望能够将其作为“初始”值传递到表单，以便用户可以看到他们之前选择的选项。

什么工作：

1.用户可以选择服务
B）服务作为整数列表保存到“service”字段（例如[2，3，5]）

不起作用：

a）在表单中不显示初始值，尽管'service'包含一个int列表。
model.py

class BaseServicesOffered(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)    
    service = models.CharField(max_length=255, default='', null=True, blank=True)

    def __str__(self):
        return self.user.username

字符串
form.py

class BaseServicesOfferedForm(forms.ModelForm):
    service = forms.MultipleChoiceField(required=False, widget=forms.CheckboxSelectMultiple)

    def __init__(self, *args, **kwargs):
        user = kwargs.pop('user')  
        selectedservices = kwargs.pop('selectedservices')
        super(BaseServicesOfferedForm, self).__init__(*args, **kwargs)
        self.fields['service'].choices = [(t.id, t.service) for t in AllServices.objects.filter(industrycode=user.userprofile.industry)]
        self.fields['service'].initial = selectedservices

    class Meta:  
        exclude = ('user',)
        model = BaseServicesOffered

型
views.py

@login_required(login_url="/accounts/login/")    
def baseservicesoffered(request):

    try:
        base_services_offered = BaseServicesOffered.objects.create(user=request.user)

    except:
        pass

    user = request.user
    services = user.baseservicesoffered.service
    instance = get_object_or_404(BaseServicesOffered, user=user)
    form = BaseServicesOfferedForm(request.POST or None, user=request.user, selectedservices=services, instance=instance)    

    if request.method == 'POST':

        if form.is_valid():
            instance = form.save(commit=False)
            instance.user = request.user

            service = form.cleaned_data['service']
            services = [int(i) for i in service] 
            instance.service = services

            instance.save()
            return redirect('/accounts/profile/')

        else:
            context = {'form': form}
            return render(request, 'accounts/setup8.html', context)

    context = {'form': form}            
    return render(request, 'accounts/setup8.html', context)

型
多谢帮忙！