Question

我正在建立一个论坛，我有一个令人厌烦的小问题。我需要生成一个包含表单的页面来填充一个 model，但该页面还应显示其他相关模型的条目。我希望表单在模型响应中填充新响应（请参阅下面的代码）。该模型将模型StartMsg作为外键。我希望页面视图（response_form）显示用户正在响应的StartMsg.msg。问题是我使用django的内置表单来生成表单，并使用render_to_response来调用页面。 render_to_response语句（标记为（A））将包含Responseses模型中的表单组件的字典发送到html模板。

如何将有关模型StartMsg的信息包含在render_to_response语句中（标记为与（A），下面）？有没有更好的方法来实现我的目标？

以下是模型：

class StartMsg (models.Model):
    msg_title = models.TextField(max_length=500)
    msg = models.TextField(max_length=2000)
    pub_date = models.DateTimeField('date published')
    author = models.ForeignKey(User)
    def __unicode__(self):
        return self.msg

class Responses (models.Model):
    startmsg = models.ForeignKey(StartMsg) #one startmsg can have many responses
    response = models.TextField()
    responder = models.ForeignKey(User)
    pub_date = models.DateTimeField('date published')
    def __unicode__(self):
        return self.response

下面是表单处理函数，后跟表单模型。

def response_form (request, msg_id):
    msg = get_object_or_404(StartMsg, pk=msg_id)
    form = MsgRespForm(request.POST or None)

    if form.is_valid():
        new_rspns = form.save(commit =False)
        #retrieve StartMsg entry to assign to the response entry foreign key
        message = StartMsg.objects.get(pk=msg_id)
        new_rspns.startmsg = message
        response = form.cleaned_data['response']
        new_rspns.response = response
        new_rspns.responder= request.user.username()
        new_rspns.pub_date = datetime.now()
        new_rspns.save()
        return HttpResponseRedirect(reverse('forum.views.forum', )) #if form is processed, view goes here

    return render_to_response( #if form not processed, view goes here
        'forumresponseform.html',
        {'form': form},  (A)
        context_instance = RequestContext(request)
    )

class MsgRespForm(forms.ModelForm):
    # Add Labels to form fields:
    response = forms.CharField(label='Your Response',
        widget=forms.Textarea(attrs={'cols': 60, 'rows': 10}))
    class Meta: #Define what fields in the form
        model = Responses
        fields = ('response',)

Answer 1

我找到了似乎有效的解决方案。您可以创建一个函数，用于从可变数量的模型查询中构建字典，然后将该字典传递到第（A）行的表单模板。

def build_dict(request, ** kwargs):
    d = dict(user=request.user, ** kwargs)
    return d

msg = get_object_or_404(StartMsg, pk=msg_id)
form = MsgRespForm(request.POST or None)
dict = build_dict(request, msg=msg, form=form)

return render_to_response( #if form not processed, view goes here
    'forumresponseform.html',
    {'form': dict},  (A)
    context_instance = RequestContext(request)
)

Django：在一个页面视图中显示来自一个模型的表单，其中包含来自第二个模型的内容

1 个答案: