Question

我遵循了FormView，它适用于我当时想要做的事情：

class LearningObjectiveView( LoginRequiredMixin, FormView ):
  form_class = LearningObjectiveForm
  template_name = 'learningobjective'
  success_url = reverse_lazy( 'learning_objective' )

  def get_context_data( self, **kwargs ):
    trainee = Trainee.objects.get( user = self.request.user )
    context = super( LearningObjectiveView, self ).get_context_data( **kwargs )
    context['learningobjective'] = LearningObjective.objects.filter( trainee = trainee.id )
    context['topic'] = Topic.objects.filter( trainee = trainee.id )
    return context

  def get_form_kwargs( self ):
    kwargs = super( LearningObjectiveView , self ).get_form_kwargs()
    kwargs['user'] = self.request.user
    return kwargs 

  def form_valid( self, form ):
    self.object = form.save( commit = False )
    if self.request.user.is_authenticated():
      self.object.trainee = Trainee.objects.get( user = self.request.user )
    self.object.save()
    form.save_m2m()
    return super( LearningObjectiveView, self ).form_valid( form )

由于我现在想要包含分页，我只是在每个CBV上看到了示例，但是FormView，我想使用带有FormMixin的ListView。

使用FormMixin的ListView

class LearningObjectiveView( LoginRequiredMixin, FormMixin, ListView ):
  form_class = LearningObjectiveForm
  template_name = 'learningobjective'
  model = LearningObjective
  success_url = reverse_lazy( 'learning_objective' )

  def get_context_data( self, **kwargs ):
    trainee = Trainee.objects.get( user = self.request.user )
    context = super( LearningObjectiveView, self ).get_context_data( **kwargs )
    context['learningobjective'] = LearningObjective.objects.filter( trainee = trainee.id )
    context['topic'] = Topic.objects.filter( trainee = trainee.id )
    return context

  def get_form_kwargs( self ):
    kwargs = super( LearningObjectiveView , self ).get_form_kwargs()
    kwargs['user'] = self.request.user
    return kwargs 

  def form_valid( self, form ):
    self.object = form.save( commit = False )
    if self.request.user.is_authenticated():
      self.object.trainee = Trainee.objects.get( user = self.request.user )
    self.object.save()
    form.save_m2m()
    return super( LearningObjectiveView, self ).form_valid( form )

显然，这只会呈现上下文数据，但不会呈现我想要使用的表单。你知道如何解决这个问题。

Answer 1

FormMixin不会按照您的想法执行操作。它所做的就是提供获取和实例化表单的方法;它不会将其添加到上下文中，也不会在提交时验证并保存它。

您可能想要使用ProcessFormView - 正如文档所述，尽管名称这实际上是一个混合。但是，您还应该记住mixins documentation警告不要试图混合使用不同通用组的mixins或视图。

Django FormMixin不呈现Form

1 个答案: