删除对象，从 ListView 到 DeleteView答案

【问题标题】：deleting objects, going from ListView to DeleteView删除对象，从 ListView 到 DeleteView
【发布时间】：2018-08-14 19:56:44
【问题描述】：

我有一个 ListView，我想从中使用 DeleteView 删除一些对象。到目前为止我所拥有的：

views.py

class BlockListView(ListView):
    model= Classroom

    def get_context_data(self, **kwargs):
        context = super(BlockListView, self).get_context_data(**kwargs)
        classroom_blocks = Classroom.objects.all()
        context = {'classroom_blocks': classroom_blocks}
        return context

list_classroom_view = BlockListView.as_view()

class BlockDeleteView(DeleteView):
    model = Classroom
    success_url = reverse_lazy('classroom:blocklist')

delete_classroom_view = BlockDeleteView.as_view()

urls.py

urlpatterns = [
    path(r'^$', views.index, name='index'),
    path('submitted', views.submitted, name='submitted'),
    path('classup/', create_classroom_view, name='classroom'),
    path('block/', views.block, name='block'),
    path('blocklist/', list_classroom_view, name='blocklist'),
    path(r'^(?P<pk>\d+)/blockDelete/$', delete_classroom_view, name='blockDelete'),
]

列表视图模板：

{% for block in classroom_blocks %}
    <li>{{ block.get_course_block_display }}<a href ="{% url 'classroom:blockDelete' block.id %}" class="button" style="color:#999999">DELETE</a></li>
{% empty %}
    <li>No classes set up yet.</li>
{% endfor %}

确认删除模板：

{% block body %}
<h1>Confirm Delete</h1>
<form action="." method="post">{% csrf_token %}
    <p>Are you sure you want to delete "{{ object.course_block }}"?</p>
    <input type="submit" value="Confirm" />
</form>
{% endblock %}

单击列表视图中的删除按钮后，生成的 url 为http://127.0.0.1:8000/classroom/%5E(%3FP89%5Cd+)/blockDelete/$，这指向确认删除页面。确认删除后，我收到Request URL: http://127.0.0.1:8000/classroom/%5E(%3FP89%5Cd+)/blockDelete/ 的 404 错误

【问题讨论】：

标签： django django-views

【解决方案1】：

您使用的是path()，因此您不应该使用正则表达式。将第一个和最后一个 URL 模式更改为：

path('', views.index, name='index'),
...
path('<int:pk>/blockDelete/', delete_classroom_view, name='blockDelete'),

现在，当您从列表视图中单击删除按钮时，您应该会被带到像 /classroom/1/blockDelete/ 这样的网址，并且您在提交表单时不应该收到 404。

【讨论】：