自动生成表格中的用户特定数据

Question

我的代码非常简单明了。这些是我的表格

class LearningObjectiveForm( ModelForm ):
  class Meta:
    model = LearningObjective
    fields = ( 'learning_objective', 'topic', )

这是我的模板

的片段

<form method="POST" action=".">
{% csrf_token %}
<table>
{{ form }}
</table>
<input type="submit" value="Speichern"/>
</form>

此表单现在使每个用户都可以访问每个主题。由于此字段通常有用户限制，我不希望显示每个主题，而只显示特定用户的主题。在我的 models 中，这个特定案例的结构看起来像这样

class Trainee( models.Model ):
  user = models.OneToOneField( User )
  first_name = models.TextField()
  last_name = models.TextField()
  education_beginning = models.DateField()
  comment = models.TextField( null = True, blank = True )

class Topic( models.Model ):
  trainee = models.ForeignKey( Trainee )
  topic = models.TextField()

class LearningObjective( models.Model ):
  trainee = models.ForeignKey( Trainee )
  topic = models.ManyToManyField( Topic, blank = True, null = True)
  learning_objective = models.TextField()

还有我的观看次数

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

  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 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()
    return super( LearningObjectiveView, self ).form_valid( form )

主题应该针对学员。我是否必须在模板中编写自己的表单，或者是否有这样的方式让我仍然可以自动生成它？

Answer 1

您可以在表单初始化函数中修改 ModelChoiceField 的 queryset 属性，这将限制选择并正确验证。

表单类似于以下代码

class LearningObjectiveForm(ModelForm):
  class Meta:
    model = LearningObjective
    fields = ('learning_objective', 'topic',)

  def __init__(self, user, *args, **kwargs):
    super(LearningObjectiveForm,self ).__init__(*args,**kwargs)
    self.fields['topic'].queryset = Topic.objects.filter(trainee=user)

然后在表单中确保与用户一起调用表单 LearningObjectiveForm(user=request.user)

Answer 2

除了 awwester 的回答之外，我还把这个添加到我的 view

class LearningObjectiveView( LoginRequiredMixin, FormView ):
    form_class = LearningObjectiveForm
    template_name = 'learningobjective.html'
    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()
        return super( LearningObjectiveView, self ).form_valid( form )

get_form_kwargs 将 kwarg 用户和当前用户传递给表单。然后我的表单最终看起来像这样：

class LearningObjectiveForm( ModelForm ):
    def __init__( self, user, *args, **kwargs ):
        trainee = Trainee.objects.get( user = user )
        super( LearningObjectiveForm, self ).__init__( *args, **kwargs )
        self.fields['topic'].queryset = Topic.objects.filter( trainee = trainee.id )

    class Meta:
        model = LearningObjective
        fields = ( 'learning_objective', 'topic', )

现在工作正常，但如果有多余或不必要的地方请告诉我:)

自动生成表格中的用户特定数据

User specific data in automatic generated forms

django

django-templates

django-forms