Question

我是Django的新手，从通常的函数类型视图开始，但我被要求仅在基于类的视图上执行此操作。所以有一个问题。我需要做一个观点，接下来的事情： - 显示选定的问题 - 显示该问题的所有答案 - 包含一个表单，允许为此问题添加新答案。

我的models.py:

from datetime import datetime
from django.db import models
from django.contrib.auth.models import User

class Question(models.Model):
    author = models.ForeignKey(User, related_name='questions')
    title = models.CharField(max_length=255)
    text = models.TextField()
    pub_date = models.DateTimeField(auto_now_add=True)
    number_views = models.IntegerField(default=0)
    number_answers = models.IntegerField(default=0)

    def __unicode__(self):
        return self.title

class Answer(models.Model):
    author = models.ForeignKey(User, related_name='answers')
    question = models.ForeignKey("Question", related_name="answers")
    text = models.TextField()
    pub_date = models.DateTimeField(auto_now_add=True)

    def __unicode__(self):
        return self.text

forms.py：

from django import forms
from apps.questions.models import Question, Answer

class QuestionForm(forms.ModelForm):
    class Meta:
        model = Question
        fields = ['title', 'text']

class AnswerForm(forms.ModelForm):
    class Meta:
        model = Answer
        fields = ['text']

来自views.py的代码，我从django docs中得到了一些类似的例子，但它不起作用......

class QuestionDetail(DetailView):
    template_name = 'questions/detail.html'
    model = Question

    def get_context_data(self, **kwargs):
        context = super(QuestionDetail, self).get_context_data(**kwargs)
        context['form'] = AnswerForm()
        return context

class AnswerView(FormView, SingleObjectMixin):
    template_name = 'questions/detail.html'
    form_class = AnswerForm
    model = Answer

    def post(self, request, *args, **kwargs):
        if not request.user.is_authenticated():
            return HttpResponseForbidden()
        self.object = self.get_object()
        return super(AnswerView, self).post(request, *args, **kwargs)

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

class QuestionDisplay(View):

    def get(self, request, *args, **kwargs):
        view = QuestionDetail.as_view()
        return view(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        view = AnswerView.as_view()
        return view(request, *args, **kwargs)

和urls.py

urlpatterns = patterns('',
    url(r'^$', views.IndexView.as_view(), name='index'),
    url(r'^(?P<pk>\d+)/$', views.QuestionDisplay.as_view(), name='detail'),
)

此代码显示所选问题和相关答案的详细信息。但是当我在表单中输入一些新答案并单击“提交”时，它只会返回错误“未找到页面”而没有任何回溯或其他内容，并且链接指向相同的URL，其中存储了问题详细信息和答案表单。

Poblem解决了：

class QuestionDetail(DetailView, ModelFormMixin, ProcessFormView):
    template_name = 'questions/detail.html'
    model = Question
    form_class = AnswerForm

    def get_success_url(self):
        return reverse('questions:detail', kwargs={'pk':self.get_object().id})

    def get_context_data(self, **kwargs):
        context = super(QuestionDetail, self).get_context_data(**kwargs)
        context['form'] = self.form_class
        return context

    def post(self, request, *args, **kwargs):
        self.object = Answer(author=request.user, question=self.get_object())
        return super(QuestionDetail, self).post(request, *args, **kwargs)

和

url(r'^(?P<pk>\d+)/$', views.QuestionDetail.as_view(), name='detail'),

在urls.py中

Answer 1

实际上，您的解决方案有两种替代方法可以避免覆盖post方法：

一种是使用DetailView并在上下文中添加表单。但是，在模板中，您需要为表单标记实际指定action属性，使用相同的表单指向单独的FormView。这个与您的解决方案类似，但有一个单独的FormView，必要时可以单独使用。

另一个是使用FormView，它还包含基于URL参数的Question对象。您可以使用该对象显示其内容，填充表单的字段等。

Django：无法结合基于类的细节和表单视图

1 个答案: