Python 使用post表单更新Django ListView

上下文

我想使用POST表单更新我的

CardListView

的查询集。我已经看过了其他描述如何使用GET的帖子，尽管我想使用POST实现它。我的当前代码根据用户在表单中输入的内容成功更新视图。但是，我在分页和URL方面遇到了问题

问题

class CardSearchForm(forms.ModelForm):

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

        for field in self.Meta.not_required:
            self.fields[field].required = False

    class Meta:
        model = Card
        fields = ['card_id', 'owner_first_name', 'owner_last_name']
        not_required = ['card_id', 'owner_first_name', 'owner_last_name']

如果我已经导航到列表视图中的另一个页面，比如第2页，我的URL将变成：

http://localhost:8000/cards/?page=2

。然后，如果我在此页面上提交帖子表单，我的URL不会更新为

http://localhost:8000/cards

（即它保持为

http://localhost:8000/cards/?page=2

）因此，如果搜索表单的结果是第2页没有结果，则会出现“未找到页面”（404）错误

---

我意识到这是因为我在

post（）

方法中返回的方式。我使用的是

render（）

而不是

redirect（）

，但是我似乎无法让表单使用

redirect（）

我已经尝试在我的

post（）

方法中对paginator page对象进行硬编码，尽管这不会更改URL“？page=2”，因此没有帮助

---

以下是相关代码：

CardListView

class CardListView(LoginRequiredMixin, ListView):
    model = Card
    template_name = 'cards/card_list.html'
    ordering = ['card_id']
    paginate_by = 2

    def post(self, request, *args, **kwargs):
        """ Executed upon submission of a POST form. """

        # Set the object list to the filtered query set
        self.object_list = self.get_queryset()

        # Get the context of the class
        self.context = self.get_context_data()

        # Render updated view with the class's context and filtered queryset
        return render(request, self.template_name, self.context)

    def get_context_data(self, **kwargs):
        context = super(CardListView, self).get_context_data(**kwargs)
        
        # Add search form to the context of the view so that it can be accessed within the template
        if 'card_search_form' not in context:
                context['card_search_form'] = CardSearchForm()

        return context

    def get_queryset(self):

        # Get the user input data from the search form
        search_form = CardSearchForm(self.request.POST)

        # Check if request is a POST request, and if the search form is valid
        if self.request.method == "POST" and search_form.is_valid():
            search_card_id = search_form.cleaned_data['card_id']
            search_owner_first_name = search_form.cleaned_data['owner_first_name']
            search_owner_last_name = search_form.cleaned_data['owner_last_name']
            return self.send_filtered_results(
                search_card_id,
                search_owner_first_name, 
                search_owner_last_name
            )
        
        # Either the request was a GET request (e.g. from when first navigating to the page) or invalid form
        else:
            
            # Return all database entries (ordered)
            return self.model.objects.order_by('card_id')

    def send_filtered_results(self, search_card_id, search_owner_first_name, search_owner_last_name):
        
        # Filter the objects based upon the search form
        return self.model.objects.filter(
            card_id__icontains=search_card_id,
            owner_first_name__icontains=search_owner_first_name,
            owner_last_name__icontains=search_owner_last_name
        ).order_by('card_id')

卡片搜索表单

class CardSearchForm(forms.ModelForm):

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

        for field in self.Meta.not_required:
            self.fields[field].required = False

    class Meta:
        model = Card
        fields = ['card_id', 'owner_first_name', 'owner_last_name']
        not_required = ['card_id', 'owner_first_name', 'owner_last_name']