Question

我正在尝试使用inlineformset在我的网页上显示特定条件的现有条目。以下是我视图中的行

TimeFormSet = inlineformset_factory(TimeSheet, Time, form=TimeForm, extra=1)
person_timesheets = Time.objects.filter(timesheet_id=timesheet)
print person_timesheets.count()
time_formset = TimeFormSet(instance=person_timesheets)

我不明白为什么会造成这种情况

'QuerySet'对象没有属性'timesheet_id'

print person_timesheets.count（）向我的控制台返回一个数字没问题...我必须在这里使用实例错误。

以下是我的模特

class Time(models.Model):
    description = models.CharField(max_length=150)
    timesheet_id = models.ForeignKey(TimeSheet, null=True, related_name="time_set")
    def __unicode__ (self):
        return self.description

class TimeSheet(models.Model):
    start_date = models.DateField()
    status = models.CharField(max_length= 50, default="Open", choices=STATUS_CHOICES)

当我在我的视图中保存我的时间时，我将timesheet_id字段设置为相关TimeSheet的Django分配ID（不确定这是否是一种混乱的方式来执行此操作...）。

def week(request, timesheet_id):
    # navigated from previous timesheet view
    timesheet = TimeSheet.objects.get(pk=timesheet_id)

    TimeFormSet = inlineformset_factory(TimeSheet, Time, form=TimeForm, extra=1)
    person_timesheets = Time.objects.filter(timesheet_id=timesheet)
    print person_timesheets.count()
    time_formset = TimeFormSet(instance=person_timesheets)

    if request.method == 'POST':
        time_formset = TimeFormSet(request.POST)
        #check validity first
        if time_formset.is_valid():
            for form in time_formset:
                form.timesheet_id = timesheet
                form.save()

    context = {
        "timesheet": timesheet,
        "time_formset": time_formset,
    }    
    return render(request, 'tande/week.html', context)

编辑：追溯

Internal Server Error: /tande/1/timesheet/week/
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/django/core/handlers/base.py", line 149, in get_response
    response = self.process_exception_by_middleware(e, request)
  File "/Library/Python/2.7/site-packages/django/core/handlers/base.py", line 147, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Library/Python/2.7/site-packages/django/contrib/auth/decorators.py", line 23, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/Users/ruthyoung/Documents/code/prodman/tande/views.py", line 344, in week
    time_formset = TimeFormSet(instance=person_timesheets.timesheet_id)
AttributeError: 'QuerySet' object has no attribute 'timesheet_id'

帮助！？

Answer 1

将相关字段命名为id name date Key 1 charles 2004-05-07 1001 2 CON 2004-05-07 1001 3 Virginia 2006-09-08 1001 4 MART 2012-01-03 1001 5 McDonalds 2013-12-30 1001 OUTPUT id old_name name date Key 1 NULL charles 2004-05-07 1001 2 charles CON 2004-05-07 1001 3 CON Virginia 2006-09-08 1001 4 Virginia MART 2012-01-03 1001 5 MART McDonalds 2013-12-30 1001并不是一个好习惯。只需related_name_id。这是因为将来，当您希望获得相关字段的related_name时，以这种方式写id代替filter(related_name__id=4)更具可读性
您在filter(related_name_id__id=4) formset工厂内传递了Time QuerySet而不是TimeSheet个实例。更改为TimeFormSet。
如果您想显示与其相关的所有现有对象，那么只需time_formset = TimeFormSet(instance=timesheet)

Answer 2

请记住，当您使用Time.objects.filter(timesheet_id=timesheet)时，您将获得一个QuerySet（模型中的实例列表，在本例中为Time模型）

执行此操作时：instance=person_timesheets将实例化完整查询集（查询返回的所有实例）而不是特定实例，因此会抛出错误'QuerySet' object has no attribute 'timesheet_id'

尝试：

person_timesheets = Time.objects.get(id=timesheet_id)
time_formset = TimeFormSet(instance=person_timesheets)

'QuerySet'对象没有属性'timesheet_id'InLineFormSets

2 个答案: