Question

在使用Django PurchaseOrder的通用视图将数据保存到数据库的两个表PurchaseOrderLineItems和CreateView时遇到问题。我收到此错误：ValueError: not enough values to unpack (expected 2, got 1)，但我不知道错误在代码中的何处。我从html表（每行具有复选框）中获取数据，该表由另一个称为Masterlist的表生成，并将保存在PurchaseOrderLineItems中。

这是我通过搜索如何保存数据来尝试的方法。我在CreateView类中创建了一个发布函数。

class PurchaseOrderCreateView(LoginRequiredMixin, CreateView):
    model = PurchaseOrder
    fields = ['project_site', 'supplier']

    def form_valid(self, form):
        form.instance.prepare_by = self.request.user
        return super().form_valid(form)

    def get_context_data(self, **kwargs):
        kwargs['object_list'] = Masterlist.objects.all()
        return super(PurchaseOrderCreateView, self).get_context_data(**kwargs)

    def post(self, request, *args, **kwargs):
        po = PurchaseOrder.objects.all()
        if request.method == 'POST':
            get_list = request.POST.getlist('checks[]')

            for item in get_list:
                get_id = Masterlist.objects.filter(item[0])

                save_to_pol = PurchaseOrderLineItems(item_no=get_id.item_no, description=get_id.description, dimension=get_id.dimension, unit=get_id.unit, quantity=get_id.quantity, cost=get_id.cost, total=get_id.cost * get_id.quantity, po_fk=pk)
                save_to_pol.save()

        return super().post(request)

错误回溯：

Environment:


Request Method: POST
Request URL: http://localhost:8000/lastmile/purchaseorder/new/

Django Version: 2.1.4
Python Version: 3.7.1
Installed Applications:
['users.apps.UsersConfig',
 'lastmile.apps.LastmileConfig',
 'crispy_forms',
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback:

File "/Users/workstationthreesoftwaredeveloper/JXMTSI/Projects/Office/Application/Web-Application/Django/environ/lib/python3.7/site-packages/django/core/handlers/exception.py" in inner
  34.             response = get_response(request)

File "/Users/workstationthreesoftwaredeveloper/JXMTSI/Projects/Office/Application/Web-Application/Django/environ/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response
  126.                 response = self.process_exception_by_middleware(e, request)

File "/Users/workstationthreesoftwaredeveloper/JXMTSI/Projects/Office/Application/Web-Application/Django/environ/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response
  124.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/Users/workstationthreesoftwaredeveloper/JXMTSI/Projects/Office/Application/Web-Application/Django/environ/lib/python3.7/site-packages/django/views/generic/base.py" in view
  68.             return self.dispatch(request, *args, **kwargs)

File "/Users/workstationthreesoftwaredeveloper/JXMTSI/Projects/Office/Application/Web-Application/Django/environ/lib/python3.7/site-packages/django/contrib/auth/mixins.py" in dispatch
  52.         return super().dispatch(request, *args, **kwargs)

File "/Users/workstationthreesoftwaredeveloper/JXMTSI/Projects/Office/Application/Web-Application/Django/environ/lib/python3.7/site-packages/django/views/generic/base.py" in dispatch
  88.         return handler(request, *args, **kwargs)

File "/Users/workstationthreesoftwaredeveloper/JXMTSI/Projects/Office/Application/Web-Application/Django/Application/ERP/lastmile/views.py" in post
  57.                 get_id = Masterlist.objects.filter(item[0])

File "/Users/workstationthreesoftwaredeveloper/JXMTSI/Projects/Office/Application/Web-Application/Django/environ/lib/python3.7/site-packages/django/db/models/manager.py" in manager_method
  82.                 return getattr(self.get_queryset(), name)(*args, **kwargs)

File "/Users/workstationthreesoftwaredeveloper/JXMTSI/Projects/Office/Application/Web-Application/Django/environ/lib/python3.7/site-packages/django/db/models/query.py" in filter
  844.         return self._filter_or_exclude(False, *args, **kwargs)

File "/Users/workstationthreesoftwaredeveloper/JXMTSI/Projects/Office/Application/Web-Application/Django/environ/lib/python3.7/site-packages/django/db/models/query.py" in _filter_or_exclude
  862.             clone.query.add_q(Q(*args, **kwargs))

File "/Users/workstationthreesoftwaredeveloper/JXMTSI/Projects/Office/Application/Web-Application/Django/environ/lib/python3.7/site-packages/django/db/models/sql/query.py" in add_q
  1263.         clause, _ = self._add_q(q_object, self.used_aliases)

File "/Users/workstationthreesoftwaredeveloper/JXMTSI/Projects/Office/Application/Web-Application/Django/environ/lib/python3.7/site-packages/django/db/models/sql/query.py" in _add_q
  1287.                     split_subq=split_subq,

File "/Users/workstationthreesoftwaredeveloper/JXMTSI/Projects/Office/Application/Web-Application/Django/environ/lib/python3.7/site-packages/django/db/models/sql/query.py" in build_filter
  1161.         arg, value = filter_expr

Exception Type: ValueError at /lastmile/purchaseorder/new/
Exception Value: not enough values to unpack (expected 2, got 1)

我想要的是，当用户填写PurchaseOrder的字段，然后检查html表（由Masterlist生成）中的项目并单击按钮时，它将保存选中的PurchaseOrderLineItems

中的项目

ValueError：在Django中没有足够的值可解包（预期2，得到1）

0 个答案: