如何允许用户在 django 中删除他们的模型对象？

Question

我一直在努力想出一个解决方案，让 django 中的登录用户删除他们自己创建的模型对象。我正在测试服务对象（他们使用 ServiceForm（ModelForm）创建的服务订单。我使用 django-safedelete 来保留 django admin 中已删除的对象，但会为用户消失。我有这种行为，但实际上无法删除对象，在delete_service url中尝试了很多带有'id'的排列，在视图中pk=id，很多不同的东西，但仍然得到相同类型的错误。（如下所述，在服务页面上，有一个在面板中显示模型对象数据的上下文，在面板的右下角有一个删除按钮/模式弹出窗口，它使用 DeleteServiceForm 函数的上下文来删除对象。我听说每个模板不能使用多个上下文，但如果不知道如何解决这个问题？）我在 ubuntu16.04 vm 上使用 python3.5、django1.11、postgresql db、apache2。

'''
#ERROR
Exception Type: NoReverseMatch at /dashboard/service/
Exception Value: Reverse for 'delete_service' with keyword arguments '{'pk': ''}' not found. 1 pattern(s) tried: ['dashboard/deleteservice/(?P<pk>\\d+)/$']

'''

# dashboard/urls.py
url(r'^dashboard/deleteservice/(?P<pk>\d+)/$', views.delete_service, name='delete_service'),
url(r'^dashboard/service/$', views.service, name='service'),

# dashboard models.py
    # django-safedelete model
from safedelete.config import *
from safedelete.models import SafeDeleteModel
from safedelete.managers import SafeDeleteManager

class MyModelManager(SafeDeleteManager):
    _safedelete_visibility = DELETED_INVISIBLE

# service model
class Service(SafeDeleteModel):
    _safedelete_policy = SOFT_DELETE_CASCADE

    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    created_at = models.DateTimeField(auto_now_add=True)

    service_type = models.ManyToManyField('ServiceType')
    description = models.TextField(blank=True)

    def __str__(self):
        return "Service Order for: {user}".format(user=self.user)

    objects = MyModelManager()

class ServiceType(models.Model):
    label = models.CharField(max_length=200, unique=True)

    def __str__(self):
        return self.label


# dashboard admin.py
class ServiceSDA(SafeDeleteAdmin):
    list_display = (highlight_deleted, '__str__', 'created_at') + SafeDeleteAdmin.list_display
    list_filter = ('user',) + SafeDeleteAdmin.list_filter
    def has_delete_permission(self, request, obj=Service):
        return True
admin.site.register(Service, ServiceSDA)


# dashboard forms.py
class NewServiceForm(forms.ModelForm):
    accept_tos = forms.BooleanField(required=True)

    class Meta:
        model = Service
        fields = '__all__'
        exclude = ('user', 'created_at',)
        widgets = {
        'description': Textarea(attrs={'cols': 65, 'rows': 3, 'class':'stucco'}),
        }

class DeleteServiceForm(forms.ModelForm):
    class Meta:
        model = Service
        fields = []


# dashboard views.py
@login_required
def service(request):
    service_list = Service.objects.all().filter(user=request.user).order_by('-created_at')
    context = {'service_list': service_list}
    return render(request, 'dashboard/service.html', context)

@login_required
def delete_service(request, pk):
    # some code to check if this object belongs to the logged in user
    if request.user.has_perm('dashboard.delete_Service'):
        service_to_delete = get_object_or_404(Service, pk=pk)

        if request.method == 'POST':
            form = DeleteServiceForm(request.POST, instance=service_to_delete)

            if form.is_valid():  # checks CSRF
                service_to_delete.delete()
                messages.warning(request, 'Success, your service order has been removed.')
                return redirect('service')

        else:
            form = DeleteServiceForm(instance=service_to_delete)

        return render(request, 'service', {'form': form, 'service_obj': service_to_delete})

    else:
        return http.Forbidden()


# dashboard / serviceblock.html  -  utilizes 2 contexts (1st is from service function, to show Service data in panel,
# 2nd is used in the modal popup, confirming deletion and using the DeleteServiceForm context 'service_obj': service_to_delete
'''
                                                        {% block services %}                                                            

                            {% for service in service_list %}

                    <div class="col-md-4">
                        <div class="panel panel-default text-left">      

                                <div class="panel-header matrix">
                                    <br>
        <h4 class="panel-title text-center" style="color: lime;"> &nbsp; SLD Service Order </h4> <br>
                                </div>

                                <div class="panel-body">
        <p>

            Created On: <span class="pull-right text-success"> {{ service.created_at }} </span> <hr>
            Service Type: <span class="pull-right text-success"> {% for type in service.service_type.all %} {{ type }} {% endfor %} </span> <hr>
            Description: <span class="pull-right text-success"> {{ service.description }} </span> 

        </p>                    
                                </div>

                                <div class="panel-footer matrix"> 
            <a href="#delservmodal" class="pull-right fa fa-times fa-2x" data-toggle="modal" aria-expanded="false" style="color: red;" title="Delete Service Order"></a> <br>
                                </div>

                        </div>
                    </div>


                            {% empty %}

                                            <div class="col-md-4 col-md-offset-3">
                             <br><br> <h4 class="text-center">No service orders opened yet.</h4>
                                            </div>
                        {% endfor %} 



<!-- Start Modal -->
<div id="delservmodal" class="modal fade">
  <div class="modal-dialog modal-sm" style="margin-top: 40vh;">
    <div class="modal-content">
        <div class="modal-body text-center">
  <h5 class="text-danger"> Please confirm to delete service order </h5> <hr>
                      <form method="post" action="{% url 'delete_service' pk=service_obj.pk %}">
                      {% csrf_token %}
<button type="submit" class="btn btn-sm" data-dismiss="modal"> Delete </button> Delete  
                        </form>
        </div>
    </div><!-- /.modal-content -->
  </div><!-- /.modal-dialog -->
</div><!-- /.modal -->
<!-- End Modal -->                      

                                                        {% endblock %} 

'''

Answer 1

经过一番挣扎，放弃为通用 DeleteView 编写不起作用的自定义视图。我找到的最佳答案在这里Python Django delete current object