Django给出错误“选择有效选择”。 Django 1.11.5版

Question

我的models.py如下：

from django.db import models
from extensions.models import SipExtension


    xmpp_users = SipExtension.objects.values_list('real_name',flat=True)
    xmpp_users_choices = [('', 'None')] + [(real_name,real_name) for real_name in xmpp_users]

    class xmpp_buddy_groups(models.Model):
        group_name = models.CharField(max_length=30)
        name = models.CharField(choices=xmpp_users_choices,max_length=100)

        def __str__(self):
            return '%s %s' % (self.group_name,self.name)

我的forms.py如下：

from django import forms
from .models import xmpp_buddy_groups
from extensions.models import SipExtension

class xmpp_buddy_groups_form(forms.ModelForm):
    xmpp_users = SipExtension.objects.values_list('real_name',flat=True)
    xmpp_users_choices = [('', 'None')] + [(real_name,real_name) for real_name in xmpp_users]
    name = forms.ChoiceField(xmpp_users_choices,required=True, widget=forms.SelectMultiple())
   # name = forms.ModelChoiceField(widget=forms.CheckboxSelectMultiple,queryset=SipExtension.objects.values_list('real_name',flat=True),required=True)
    class Meta:
      model = xmpp_buddy_groups
      fields = ['group_name']

我的views.py如下：

from django.shortcuts import render
from django.http import HttpResponseRedirect
from django.contrib.auth.decorators import login_required
from .forms import xmpp_buddy_groups_form

@login_required
def index(request):
    # if this is a POST request we need to process the form data
    if request.method == 'POST':
        # create a form instance and populate it with data from the request:
        form = xmpp_buddy_groups_form(request.POST)
        # check whether it's valid:
        if form.is_valid():
            # process the data in form.cleaned_data as required
            # ...
            # redirect to a new URL:
            #return HttpResponseRedirect('/index.html')
            form.save()

    # if a GET (or any other method) we'll create a blank form
    else:
        form = xmpp_buddy_groups_form()
        print(form.errors)

    return render(request, 'xmpp/index.html', {'form': form})

我的模板index.html在下面

{% extends 'base.html' %}
{% block content %}
<form action="" method="post">
    {% csrf_token %}
    {{ form.as_p }}
    <input type="submit" value="Create Buddy Groups">
</form>
{% endblock %}

django给了我无效的选择错误。 图像已附加。

谢谢帮助我。 看来，模型的选择和通过表格显示在模板中的选择是不匹配的，但由于两者是完全相同的选择，我无法弄清原因。

Answer 1

models.py

from django.db import models
from extensions.models import SipExtension

    class xmpp_buddy_groups(models.Model):
        group_name = models.CharField(max_length=30)
        name = models.ForiegnKey(SipExtension)

        def __str__(self):
            return '%s %s' % (self.group_name,self.name)

表格

from django import forms
from .models import xmpp_buddy_groups
from extensions.models import SipExtension

class xmpp_buddy_groups_form(forms.ModelForm):
    class Meta:
      model = xmpp_buddy_groups
      fields = ['group_name']

    def __init__(self, *args, **kwargs):
    super(xmpp_buddy_groups_form, self).__init__(*args, **kwargs)
    if self.instance:
        self.fields['name'].initial = SipExtension.objects.get(pk=self.instance.SipExtension).real_name