python - 过滤表单内的查询集

Question

我有一个包含工作订单列表的应用程序，另一个包含零件列表的应用程序。

class Order(models.Model):
  parts = models.ManyToManyField(Part, blank=True) # Assosiated parts

class Part(models.Model):
  partnum = models.CharField(max_length=20) # Part number
  mwos = models.ManyToManyField('mtn.Order', blank=True) # Assosiated work orders

现在我想给我的 DetailView 添加一个按钮对于将打开零件列表的订单，我将能够将其添加到我的订单中。目前我已经创建了一个 UpdateView我的订单

class AddPartView(LoginRequiredMixin, UserPassesTestMixin, UpdateView):   
    model = Order
    form_class = AddPartForm
    ...   

和一个表格

class AddPartForm(forms.ModelForm):
    class Meta:
        model = Order
        fields = ['parts', ]
        labels = {'parts': "Parts", }

    def FilterList(request):
        qs = Part.objects.all()
        search_part_query = request.GET.get('search_part')

        if is_valid_queryparam(search_part_query):
            qs = qs.filter(Q(partnum__icontains=search_part_query) 
                | Q(descr__icontains=search_part_query)
                ).distinct()

        return qs         

    def __init__(self, *args, **kwargs):

        super(AddPartForm, self).__init__(*args, **kwargs)

        self.fields["parts"].widget = CheckboxSelectMultiple()
        self.fields["parts"].queryset = self.FilterList()

对于这个模板

{% block content %}

  <form method="GET" action=".">
    <div class="form-row justify-content-start">
      <div class="form-group col-md align-self-center">
        <div class="input-group">
          <input class="form-conrol py-2 border-right-0 border" type="search" placeholder="Find part" name="search_part">
            <span class="input-group-append">
              <div class="input-group-text bg-transparent">
                <i class="fa fa-search"></i>
              </div>
            </span>                      
        </div>
      </div>            
    </div>
    <button type="submit" class="btn btn-primary btn-sm btn-block">Search</button>    
  </form>

  <form action="{% url 'mtn:add_part' order.id %}" method='post'>
    {% csrf_token %}
    {{ form.as_p }}  
    <button type="submit">Save</button>
  </form>

{% endblock content %}

但是当我执行它时我得到 'AddPartForm' object has no attribute 'GET'错误。

我是编程新手，所以也许我以错误的方式接近这个。

Answer 1

表单通常不知道 request目的。您可以制作这样的表格，例如:

class AddPartForm(forms.ModelForm):
    class Meta:
        model = Order
        fields = ['parts', ]
        labels = {'parts': "Parts", }
        widgets = {
            'parts': CheckboxSelectMultiple
        }

    def filter_list(self, request):
        qs = Part.objects.all()
        search_part_query = request.GET.get('search_part')

        if is_valid_queryparam(search_part_query):
            qs = qs.filter(Q(partnum__icontains=search_part_query) 
                | Q(descr__icontains=search_part_query)
                ).distinct()

        return qs         

    def __init__(self, *args, request=None, **kwargs):
        super(AddPartForm, self).__init__(*args, **kwargs)
        self.fields["parts"].queryset = self.filter_list(request)

在 AddPartView ，您可以通过 request通过覆盖 .get_form_kwargs(..) method [Django-doc] 作为表单的参数

class AddPartView(LoginRequiredMixin, UserPassesTestMixin, UpdateView):   
    model = Order
    form_class = AddPartForm

    def get_form_kwargs(self):
        kwargs = super().get_form_kwargs()
        kwargs.update(request=self.request)
        return kwargs