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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。所以有问题。我需要创建一个视图，它会执行以下操作： - 显示一个选定的问题 - 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。

我的模型.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

表格.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中拿了一些类似的例子，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，它只会返回一个错误“找不到页面”，没有任何回溯或其他内容，并带有指向相同 URL 的链接，其中存储了问题详细信息和答案表单。

问题解决：

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

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1 回答 1

0

实际上，您的解决方案有两种替代方法可以避免覆盖该post方法：

一种是使用 aDetailView并在上下文中添加一个表单。但是，在模板中，您需要实际指定action表单标签的属性，指向一个单独FormView的使用相同的表单。这个类似于您的解决方案，但有一个单独的FormView，然后可以在必要时单独使用。

另一种是使用基于 URL 参数的FormView也将包含该对象的对象。Question您可以使用该对象来显示其内容、填充表单的字段等等。

于 2013-09-27T20:03:37.293 回答