python - 如何排除 ModelMultipleChoiceField 中的值？

Question

我不希望登录用户出现在这个 ModelMultipleChoiceField 上，以限制他们自己与自己建立关注关系？那么我如何从查询集中排除已登录的用户，这可能是一个简单的解决方法，但我是 Django 的新手，现在已经有几个小时没有解决这个问题了。

表单.py

class Add_Profile(forms.ModelForm):

def __init__(self,*args, **kwargs): # initializing your form in other words loading it
    super(Add_Profile, self).__init__(*args, **kwargs)
    user_id = kwargs.pop('user_id') # taking user_id out of the querylist
    self.fields['follows'] = forms.ModelMultipleChoiceField(widget=forms.CheckboxSelectMultiple(), queryset=UserProfile.objects.filter(~Q(id=user_id)))

  class Meta:
     model = UserProfile
     fields = (
        'bio',
        'follows',
        'theme',
        'profile_picture',
     )

View .py

@login_required   
def edit_profile(request, user_id):
userprofile = UserProfile.objects.get(pk=user_id)
if request.method == 'POST':
    edit_profile = Add_Profile(request.POST, request.FILES, instance=userprofile, user_id=request.user.id)
    if edit_profile.is_valid():
        edit_profile.save()
        return redirect('/home/user/{0}/'.format(request.user.username))
    else:
        print edit_profile.errors
else:
    edit_profile = Add_Profile(instance=userprofile, user_id=request.user.id)
return render (request, 'edit.html', {'form': edit_profile,})

错误:init() 得到了一个意外的关键字参数 'user_id'

Answer 1

您绝对可以使用 forms.Form 而不是 forms.ModelForm 并使用类似于 this example in the docs 的内容来做到这一点:

from django import forms
from django.contrib.auth import get_user_model

class Add_Profile(forms.Form):
    follows = forms.ModelMultipleChoiceField(queryset=None)

    def __init__(self, user=None, *args, **kwargs):
        super(Add_Profile, self).__init__(*args, **kwargs)
        if user is not None:
            self.fields['follows'].queryset = get_user_model().objects.exclude(pk=user.pk)
        else:
            self.fields['follows'].queryset = get_user_model.objects.all()

只需在实例化表单时传入您希望排除的用户即可:

form = Add_Profile()  # all users will be present in the dropdown
some_guy = User.objects.get(pk=4)
form = Add_Profile(user=some_guy)  # all users except some_guy will be present