Question

我正从我的第二个模型LeaseExtra计算我的Extra模型中的属性。

但它对我没用。

为什么我收到此错误？：

LeaseExtra匹配查询不存在。

class Extra(CommonInfo):
    version = IntegerVersionField( )
    number = models.CharField(max_length=30,null=True, blank=True)
    max_occupants = models.PositiveSmallIntegerField()

    _lease = None


    def _get_total(self):


        from conditions.models import LeaseExtra

        le_dict = LeaseExtra.objects.get(extra_id=self.id, is_active = True )
        if le_dict:
            lease =  le_dict.lease
        else:  
            lease =  0

        self._lease = lease



class LeaseExtra(CommonInfo):
    version = IntegerVersionField( )
    extra = models.ForeignKey(Extra,on_delete=models.PROTECT)
    lease = models.ForeignKey(Lease,on_delete=models.PROTECT)
    is_included = models.BooleanField(default=True)

回溯：

文件＆＃34; C：\用户\ PAPA \ DEV \ rent_unit \ rent_unit_venv \ lib中\站点包\ django的\芯\处理程序\ base.py＆＃34; 在get_response中 132. response = wrapped_callback（request，* callback_args，** callback_kwargs）文件＆＃34; C：\ Users \ PAPA \ DEV \ rent_unit \ rent_unit_venv \ lib \ site-packages \ django \ contrib \ auth \ decorators.py＆＃34; 在_wrapped_view中 22. return view_func（request，* args，** kwargs）文件＆＃34; C：\ Users \ PAPA \ DEV \ rent_unit \ src \ unit \ views.py＆＃34;在extra_available_list中 163. extra_list = [obj for obj in extra_list if（（obj.lease）== 0）] 文件＆＃34; C：\ Users \ PAPA \ DEV \ rent_unit \ src \ unit \ models.py＆＃34;在租赁 166. self._get_total（）文件＆＃34; C：\ Users \ PAPA \ DEV \ rent_unit \ src \ unit \ models.py＆＃34;在_get_total中 151. le_dict = LeaseExtra.objects.get（extra_id = self.id，is_active = True）文件＆＃34; C：\ Users \ PAPA \ DEV \ rent_unit \ rent_unit_venv \ lib \ site-packages \ django \ db \ models \ manager.py＆＃34; 在manager_method中 127. return getattr（self.get_queryset（），name）（* args，** kwargs）文件＆＃34; C：\ Users \ PAPA \ DEV \ rent_unit \ rent_unit_venv \ lib \ site-packages \ django \ db \ models \ query.py＆＃34; 在得到 334. self.model._meta.object_name
Exception Type: DoesNotExist at /unit/list/extra/available/
Exception Value: LeaseExtra matching query does not exist.

更新：

视图

    @login_required
def extra_available_list(request):
    EXTEND = "rent_base.html"
    extra_list = ExtraFilter(request.GET, queryset=Extra.objects.all().order_by('-created'))
    extra_list = [obj for obj in extra_list if ((obj.lease)==0)]

    paginator = Paginator(unit_list, 10) # Show 25 contacts per page

    page = request.GET.get('page')
    try:
        extra_page = paginator.page(page)
    except PageNotAnInteger:
        # If page is not an integer, deliver first page.
        extra_page = paginator.page(1)
    except EmptyPage:
        # If page is out of range (e.g. 9999), deliver last page of results.
        extra_page = paginator.page(paginator.num_pages)

    #return render(request, 'customer/company_list.html', {'company': company})
    return render(request,'unit/extra_list.html', {'extra': extra_list,'page_extra':extra_page})

URL

url(r'^list/extra/available/$', views.extra_available_list, name="extra_available_list"),

Django匹配查询中的错误不存在

0 个答案: