Django CBV (ListView) paginate_by 查询集不允许

Question

我正在尝试对我的任务进行分页，但我做不到

views.py:

class DashboardTaskAppView(LoginRequiredMixin, ListView):
    model = Task
    template_name = "task_app/task_dashboard.html"
    context_object_name = 'tasks'
    today = datetime.date.today()
    paginate_by = 5
    
    def queryset(self):
        ordering = ['-due_date']
        usr = self.request.user
        return Task.objects.filter(Q(responsable=usr))

没有 paginate_by = 5:

与 paginate_by = 5:

TypeError at /task/
object of type 'method' has no len()
Request Method: GET
Request URL:    http://localhost:8000/task/
Django Version: 3.1.2
Exception Type: TypeError
Exception Value:    
object of type 'method' has no len()
Exception Location: C:\Users\caior\Desktop\Python\simple_task\venv\lib\site-packages\django\core\paginator.py, line 95, in count
Python Executable:  C:\Users\caior\Desktop\Python\simple_task\venv\Scripts\python.exe
Python Version: 3.8.5
Python Path:    
['C:\*\*\*\Python\simple_task',
 'C:\*\*\*\Python\simple_task\venv\Scripts\python38.zip',
 'c:\*\*\*\local\programs\python\python38-32\DLLs',
 'c:\*\*\*\local\programs\python\python38-32\lib',
 'c:\*\*\*\local\programs\python\python38-32',
 'C:\*\*\*\Python\simple_task\venv',
 'C:\*\*\*\Python\simple_task\venv\lib\site-packages']
Server time:    Mon, 09 Nov 2020 09:48:07 +0100

控制台：

  File "C:\*\*\*\Python\simple_task\venv\lib\site-packages\django\core\paginator.py", line 95, in count
    return len(self.object_list)
TypeError: object of type 'method' has no len()
[09/Nov/2020 09:48:07] "GET /task/ HTTP/1.1" 500 112987

感谢任何帮助，非常感谢，亲切的问候

Answer 1

您正在覆盖 queryset attribute of the View with a method. Instead, you should override get_queryset 方法：

class DashboardTaskAppView(LoginRequiredMixin, ListView):
    # rest of the code

    def get_queryset(self):
        ordering = ['-due_date']
        usr = self.request.user
        return Task.objects.filter(Q(responsable=usr))

Django CBV (ListView) paginate_by 查询集不允许

Django CBV (ListView) paginate_by not allowed with queryset

django

django-pagination