CBV传递带有验证的CBV表格

Question

我是django的新手。

我正在使用基于类的视图构建CRUD应用程序，如下所示：

views.py

class CreateInterventionView(CreateView):
    form_class = NewIntervention
    success_url = reverse_lazy('list')
    template_name = 'intervention_create.html'

    def form_valid(self, form):
       form.instance.speaker = self.request.user
       return super().form_valid(form)

class UpdateInterventionView(LoginRequiredMixin, UserPassesTestMixin, UpdateView):
    model = Intervention
    form_class = NewIntervention
    success_url = reverse_lazy('list')
    template_name = 'intervention_update.html'

    def form_valid(self, form):
        form.instance.speaker = self.request.user
        return super().form_valid(form)

    def test_func(self):
        post = self.get_object()
        if self.request.user == post.speaker:
           return True
        return False

class DeleteInterventionView(DeleteView):
    model = Intervention
    template_name = 'intervention_delete.html'
    context_object = 'intervention'
    success_url = reverse_lazy('list')

forms.py

class NewIntervention(forms.ModelForm):

class Meta:
    model = Intervention
    fields = ('subject', 'begin_date', 'end_date', 'description', 'campus')
    widgets = {
        'description': forms.Textarea(attrs={'class': 'materialize-textarea'}),
        'begin_date': forms.DateInput(attrs={'class': 'datepicker'}),
        'end_date': forms.DateInput(attrs={'class': 'datepicker'}),
        }

def clean(self):
    cleaned_data = super().clean()
    begin_date = cleaned_data.get("begin_date")
    end_date = cleaned_data.get("end_date")
    if end_date < begin_date:
        raise forms.ValidationError("End date should be greater than start date.")

我的HTML模式

    <!-- Modal Trigger -->
  <a class="waves-effect waves-light btn modal-trigger" href="#modal1">Modal</a>
  <!-- Modal Structure -->
  <div id="modal1" class="modal">
    <div class="modal-content">
      <form method="post">
        {% csrf_token %}
        {{ form.as_p }}
        <button class="btn modal-close waves-effect waves-light" type="submit" name="action">Submit
          <i class="material-icons right">send</i>
        </button>
      </form>   
     </div>
  </div>

我也有一个CBV ListView，我希望用户能够在与ListView相同的页面上创建/更新/删除干预（我有用于执行crud操作的按钮，当用户单击它时，它会以以下形式打开materializecss模态）

我尝试过：

class ListInterventionView(ListView):
    model = Intervention
    template_name = 'intervention_list.html'
    ordering = ''
    paginate_by = 5

    def get_queryset(self):
        return Intervention.objects.filter(speaker=self.request.user)

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

该模式正在运行，并且我在其中具有表单，但是当我创建新干预时，它不起作用，并且我不知道如何在列表视图中进行验证。

欢迎任何建议。非常感谢。

最诚挚的问候。

Answer 1

这里的问题是，您不是在cleaned_data方法中返回 clean：

class NewIntervention(forms.ModelForm):
    # ...
    def clean(self):
        cleaned_data = super().clean()
        begin_date = cleaned_data.get("begin_date")
        end_date = cleaned_data.get("end_date")
        if end_date < begin_date:
            raise forms.ValidationError("End date should be greater than start date.")
        return cleaned_data

编辑

您还需要将action的form属性连接到适当的url；因此，假设您使用以下网址来创建新的Intervention实例：

...
path('intervention/new/', CreateInterventionView.as_view(), name='new-intervention'),
...

然后您需要将表单的action更改为：

    <!-- Modal Trigger -->
  <a class="waves-effect waves-light btn modal-trigger" href="#modal1">Modal</a>
  <!-- Modal Structure -->
  <div id="modal1" class="modal">
    <div class="modal-content">
      <form method="post" action="{% url 'new-intervention' %}">
        {% csrf_token %}
        {{ form.as_p }}
        <button class="btn modal-close waves-effect waves-light" type="submit" name="action">Submit
          <i class="material-icons right">send</i>
        </button>
      </form>   
     </div>
  </div>