python - Django 分页 - 如何重定向回 ListView 和页码

Question

在 ListView 中，我使用 Paginator 和 paginate_by = 5 渲染一个表格。在每一行中，我都有一个打开 UpdateView 的按钮。成功更新后，我回到了 ListView，但始终位于第一页。如何更改 success_url 以便返回我打开 UpdateView 的页码？Django 有没有合适的方法来解决这个问题？

#views.py

class Orders_list(ListView):
    model = Order
    context_object_name = "orders"
    queryset = Order.objects.all()
    paginate_by = 5
    template_name = "orders/orders_list.html"

#http://127.0.0.1:8000/orders/?page=4


class Orders_update(UpdateView):
    model = Order
    form_class = Order_UpdateForm
    template_name = "orders/orders_update.html"
    #success_url = '../../../orders/'
    success_url = reverse_lazy('orders')


#urls.py

urlpatterns = [
    url(r'^orders/$', Orders_list.as_view()),
    url(r'^orders/detail/(?P<pk>\d+)/$', Orders_detail.as_view()),
]


#forms.py

class Order_UpdateForm(forms.ModelForm):
    class Meta:
        model = Order
        fields = ['order_text', 'customer', 'cyclist']

    def __init__(self, *args, **kwargs):
        super(Order_UpdateForm, self).__init__(*args, **kwargs)
        self.fields['cyclist'].queryset = Cyclist.objects.filter(active=True)


#models.py

class Order(models.Model):
    customer = models.ForeignKey('Customer')
    cyclist = models.ForeignKey('Cyclist')
    order_text = models.CharField(max_length=200)
    pick_up = models.CharField(max_length=200)
    destination = models.CharField(max_length=200)
    created_date = models.DateTimeField(default=timezone.now)
    changed_date = models.DateTimeField(blank=True, null=True)

    def created(self):
        self.changed_date = timezone.now()
        self.save()

    def __str__(self):
        return self.order_text


class Customer(models.Model):
    company_name = models.CharField(max_length=200)
    created_date = models.DateTimeField(default=timezone.now)
    changed_date = models.DateTimeField(blank=True, null=True)

    def created(self):
        self.changed_date = timezone.now()
        self.save()

    def __str__(self): return self.company_name


class Cyclist(models.Model):
    lastname = models.CharField(max_length=20)
    firstname = models.CharField(max_length=20)
    created_date = models.DateTimeField(default=timezone.now)
    changed_date = models.DateTimeField(blank=True, null=True)
    active = models.BooleanField(default=True)

    def created(self):
        self.changed_date = timezone.now()
        self.save()

    def __str__(self):
        return self.lastname

更新

我找到了解决这个问题的方法(可能是)。但我还是想念一些东西。

到目前为止我做了什么:

在 ListView 模板中，我扩展了 Url...

window.open("{{ request.path }}update/" + id + "/?page=" + {{ page_obj.number }});

...然后在 View 中我覆盖了 get_context_data 方法...

#views.py

class Orders_update(UpdateView):
    model = Order
    form_class = Order_UpdateForm
    template_name = "orders/orders_update.html"
    page = "1" # Assigned

    def get_context_data(self, **kwargs):
        context = super(Orders_update, self).get_context_data(**kwargs)
        page = self.request.GET.get('page') # Modified
        return context

    success_url = '../../../orders/?page=' + str(page) # Should be used here to redirect to a specific page on a ListView

...但是现在...如何访问 success_url 中 views.py 中的变量 page ？我认为这是非常基本的东西(希望如此)，而且我想我不明白作用域在 Python 中是如何工作的。

Answer 1

这最终对我有用。基本上，我只是覆盖了 get_success_url 来访问请求中的 page 参数。

class Orders_update(UpdateView):
    model = Order
    form_class = Order_UpdateForm
    template_name = "orders/orders_update.html"

    def get_success_url(self):
        global page
        page = self.request.GET.get('page')
        return reverse_lazy('orders')