Django无法分配“u'username”“：”Message.recipient“必须是“用户”例

问题描述

为什么我得到这个错误？

我不知道如何摆脱这个错误。
我如何清理表单字段以启用用户名验证？

提前感谢。

  class InboxCompany（generic.UpdateView）：
 
 model = CandidateToJob 
 template_name ='dashboard / inbox-company.html'
 form_class = ComposeMessage 
 
 def get（self，* args，** kwargs）：
 recipient = self.get_object（queryset = CandidateToJob.objects.select_related（'candidate'））
如果收件人不是无：
 user = User.objects.get（username = recipient.candidate.user.username）
 self.initial = {'收件人'：用户} 
返回超级（InboxCompany，self）.get（* args，** kwargs）
  

forms.py

  class ComposeMessage（ModelForm）：
 recipient = forms.CharField（
 required = True，
 widget = forms.TextInput（attrs = {'class'：'form-control'}）
）
 body = forms.CharF ield（
 required = True，
 widget = forms.TextInput（attrs = {'class'：'form-control'}）
）
 
 class Meta： 
 model =消息
  

解决方案

这是我的答案：

views.py

  class InboxCompany（generic.UpdateView）：
 
 model = CandidateToJob 
 template_name ='dashboard / inbox-company.html'
 form_class = ComposeMessage 
 
 def get_success_url（self）：
 return reverse（'inboxcompany'，kwargs = {'pk'：self.object.pk}）
 
 def get_context_data（self，** kwargs）：
 context = super（InboxCompany，self）.get_context_data（** kwargs）
 context ['message_list'] = Message.objects.inbox_for（self .request.user）
上下文['sent_list'] = Message.objects.outbox_for（self.request.user）
返回上下文
 
 def get_initial（self，* args， ** kwargs）
 recipient = self.get_object（queryset = CandidateToJob.objects.select_related（'candidate.user.id'））
 self.initial = {'recipient'：recipient} 
 return self.initial 
 
 def get_form_kwargs（self，* args，** kwargs）：
 kwargs = {'initial'：self.get_initial（）} 
 return kwargs 
 
 def post（self，request，* args，** kwargs）：
 
 form = self.form_class（request.POST）
 
如果form.is_valid （）：
 
 #get从表单
 data = form.cleaned_data 
 body = data ['body'] 
 
 #auto填写字段的数据
 sender = request.user 
 sent_at = timezone.now（）
 recipient = self.get_object（queryset = CandidateToJob.objects.select_related（'candidate.user.id'）
 user = User.objects.all（）。get（id = recipient.candidate.user.id）
 
a = Message.objects.create（sender = sender，recipient = user，sent_at = sent_at， body = body）
 a.save（）
 
 
返回HttpResponse（'Success'）
  

form.py

  class ComposeMessage（forms.Form）：
 recipient = forms.CharField（
 required = True，
 widget = forms.HiddenInput（attrs = {'class'：'form-control'}）
）
 body = forms.CharField（
 required = True，
 label =Mensagem，
 widget = forms.TextInput（attrs = {'class'：'form-control'}）
）
 
 def __init __（self，* args，** kwargs）：
 recipient_filter = kwargs.pop（'recipient_filter'，None）
 super（ComposeMessage，self）.__ init __（* args，** kwargs） 
如果recipient_filter不是None：
 self.fields ['recipient'] ._ recipient_filter = recipient_filter 
 
 
 def save（self，sender，parent_msg = None）： 
 recipient = self.cleaned_data ['recipient'] 
 body = self.cleaned_data ['body'] 
 message_list = [] 
 for r in recipient： 
 msg =消息（
 sender = sender，
 recipient = r，
 subject = subject，
 body = body，
）
 if parent_msg不是无：
 msg.parent_msg = parent_msg 
 parent_msg.replied_at = datetime.datetime.now（）
 parent_msg.save（）
 msg.save（）
 message_list.append（msg）
如果通知：
如果parent_msg不是None：
 notification.send（[sender]，messages_replied，{'message'：msg，}）
 notification.send（[r]，message_reply_received，{'message'：msg，}）
 else：
 notification.send（[sender]，messages_sent，{'message' ：msg，}）
 notification.send（[r]，messages_received，{'message'：msg，}）
返回message_list 
  

models.py

  class Message 

从用户到用户的私人消息

 body = models.TextField（_（Mensagem））
 sender = models.ForeignKey（AUTH_USER_MODEL，related_name ='sent_messages'）
 recipient = models.ForeignKey（AUTH_USER_MODEL，related_name ='received_messages'，null = False，blank = True）
 parent_msg = models.ForeignKey （'self'，related_name ='next_messages'，null = True，blank = True）
 sent_at = models.DateTimeField（null = True，blank = True）
  pre> 
why I'm getting this error? 

I don't know how to get rid of this error.
How can i clean the form field to enable the username to be validated?

Thanks in advance.
class InboxCompany(generic.UpdateView):

    model = CandidateToJob
    template_name = 'dashboard/inbox-company.html'
    form_class = ComposeMessage

    def get(self, *args, **kwargs):
        recipient = self.get_object(queryset=CandidateToJob.objects.select_related('candidate'))
        if recipient is not None:
            user = User.objects.get(username=recipient.candidate.user.username)
            self.initial = {'recipient': user}
        return super(InboxCompany, self).get(*args, **kwargs)
forms.py
 class ComposeMessage(ModelForm):
    recipient = forms.CharField(
        required=True,
        widget=forms.TextInput(attrs={'class': 'form-control'})
    )
    body = forms.CharField(
        required=True,
        widget=forms.TextInput(attrs={'class': 'form-control'})
    )

    class Meta:
        model = Message
 解决方案 
I got it working finally.
Here is my answer:
The views.py
class InboxCompany(generic.UpdateView):

model = CandidateToJob
template_name = 'dashboard/inbox-company.html'
form_class = ComposeMessage

def get_success_url(self):
    return reverse('inboxcompany', kwargs={'pk': self.object.pk})

def get_context_data(self, **kwargs):
    context = super(InboxCompany, self).get_context_data(**kwargs)
    context['message_list'] = Message.objects.inbox_for(self.request.user)
    context['sent_list'] = Message.objects.outbox_for(self.request.user)
    return context

def get_initial(self, *args, **kwargs):
    recipient = self.get_object(queryset=CandidateToJob.objects.select_related('candidate.user.id'))
    self.initial = {'recipient': recipient}
    return self.initial

def get_form_kwargs(self, *args, **kwargs):
    kwargs = {'initial': self.get_initial()}
    return kwargs

def post(self, request, *args, **kwargs):

    form = self.form_class(request.POST)

    if form.is_valid():

        #get data from the form
        data = form.cleaned_data
        body = data['body']

        #auto fill fields
        sender = request.user
        sent_at = timezone.now()
        recipient = self.get_object(queryset=CandidateToJob.objects.select_related('candidate.user.id'))
        user = User.objects.all().get(id=recipient.candidate.user.id)

        a = Message.objects.create(sender=sender, recipient=user, sent_at=sent_at, body=body)
        a.save()


    return HttpResponse('Success')
The forms.py
class ComposeMessage(forms.Form):
recipient = forms.CharField(
    required=True,
    widget=forms.HiddenInput(attrs={'class': 'form-control'})
)
body = forms.CharField(
    required=True,
    label="Mensagem",
    widget=forms.TextInput(attrs={'class': 'form-control'})
)

def __init__(self, *args, **kwargs):
    recipient_filter = kwargs.pop('recipient_filter', None)
    super(ComposeMessage, self).__init__(*args, **kwargs)
    if recipient_filter is not None:
        self.fields['recipient']._recipient_filter = recipient_filter


def save(self, sender, parent_msg=None):
    recipients = self.cleaned_data['recipient']
    body = self.cleaned_data['body']
    message_list = []
    for r in recipients:
        msg = Message(
            sender = sender,
            recipient = r,
            subject = subject,
            body = body,
        )
        if parent_msg is not None:
            msg.parent_msg = parent_msg
            parent_msg.replied_at = datetime.datetime.now()
            parent_msg.save()
        msg.save()
        message_list.append(msg)
        if notification:
            if parent_msg is not None:
                notification.send([sender], "messages_replied", {'message': msg,})
                notification.send([r], "messages_reply_received", {'message': msg,})
            else:
                notification.send([sender], "messages_sent", {'message': msg,})
                notification.send([r], "messages_received", {'message': msg,})
    return message_list
The models.py
class Message(models.Model):
"""
A private message from user to user
"""
body = models.TextField(_("Mensagem"))
sender = models.ForeignKey(AUTH_USER_MODEL, related_name='sent_messages')
recipient = models.ForeignKey(AUTH_USER_MODEL, related_name='received_messages', null=False, blank=True)
parent_msg = models.ForeignKey('self', related_name='next_messages', null=True, blank=True)
sent_at = models.DateTimeField(null=True, blank=True)
                        
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