在编辑预订 django 时使编辑功能无冲突

Question

我制作了具有过滤功能的巴士预订系统，以防止在同一日期重复预订同一辆巴士..

这是 forms.py 上的代码：

class BookingEditForm(forms.ModelForm):
    class Meta:
        model = Booking
        fields = '__all__'

        widgets = {
            'idbooking': forms.HiddenInput(attrs={'class': 'form-control', 'id': 'id_booking', 'style':'text-transform: uppercase'}),
            'BusId': forms.Select(attrs={'class': 'form-control', 'id': 'bus_id'}),
            'start' : forms.DateInput(format=('%Y-%m-%d'), attrs={'type': 'date', 'class': 'form-control', 'required':'true'}),
            'end_date' : forms.DateInput(format=('%Y-%m-%d'), attrs={'type': 'date', 'class': 'form-control', 'required':'true'}),
            }
    
    def clean(self):
        start = self.cleaned_data['start']
        end_date = self.cleaned_data['end_date']
        BusId = self.cleaned_data['BusId']

        res_all = Booking.objects.all().filter(BusId=BusId)
        for item in res_all:
            if start <= item.start and item.start <= end_date or start <= item.end_date and item.end_date <= end_date:
                raise forms.ValidationError("Bus already reserved on same date!")

views.py :

@login_required(login_url='login')
def edit_book(request, pk):
    booking = Booking.objects.get(idbooking=pk)
    booking_forms = BookingEditForm(instance=booking)
    customer_forms = CustomerForm(initial={
            'phone': request.GET.get('phone'),
            'name': request.GET.get('name')
        })
    if request.method == 'POST':
        booking_forms = BookingEditForm(request.POST)
        if booking_forms.is_valid():

            idbooking = booking_forms.cleaned_data['idbooking']
            BusId = booking_forms.cleaned_data['BusId']
            start = booking_forms.cleaned_data['start']
            end_date = booking_forms.cleaned_data['end_date']

            Booking.objects.filter(idbooking=booking).update(
                idbooking=idbooking,
                BusId=BusId,
                start=start,
                end_date=end_date,
            ),
            return redirect('booking-list')

        else:
            print(booking_forms.errors)
        
    context = {
        'cform': customer_forms,
        'form': booking_forms,
    }

    return render(request, 'booking/create_book.html', context)

现在，我需要帮助运行编辑过滤功能，因为它适用于创建预订但是当我尝试在编辑时实施时，它不起作用

我觉得 idbooking

上有事可做

Answer 1

尝试使用 instance 属性进行更新操作。如下更改清洁方法。它应该工作

def clean(self):
    start = self.cleaned_data['start']
    end_date = self.cleaned_data['end_date']
    BusId = self.cleaned_data['BusId']
    if hasattr(self,'instance'): # if this raises error try if self.instance: instead
        res_all = Booking.objects.exclude(BusId=self.instance.BusId).filter(BusId=BusId)
    else:
        res_all = Booking.objects.all().filter(BusId=BusId)
    for item in res_all:
        if start <= item.start and item.start <= end_date or start <= item.end_date and item.end_date <= end_date:
            raise forms.ValidationError("Bus already reserved on same date!")

在编辑预订 django 时使编辑功能无冲突

Make edit funcion without conflict on edit booking django

python

django

django-queryset