无法赋值“”7“”："Appointment.your_service“必须是"Service”实例

Question

我正在做一个项目“美容院管理系统”，我得到了这个错误(不能赋值"'7'"："Appointment.your_service“必须是一个”服务“实例。)这里的任何人都可以帮助我，谢谢。

当我填写预订预约表格时，我得到了这个错误。

models.py

class Service(models.Model):
    name = models.CharField(max_length=50)
    price = models.IntegerField(default=0)
    image = models.ImageField(upload_to='uploads/productImg')

class Appointment(models.Model):
    your_name = models.CharField(max_length=100)
    your_phone = models.CharField(max_length=10)
    your_email = models.EmailField(max_length=200)
    your_service = models.ForeignKey('Service', on_delete=models.CASCADE, default=1)
    your_date = models.DateField() 

views.py

def appointments(request):
    if request.method == 'GET':
        return render(request, 'core/bookappointment.html')
    else:   
        your_name = request.POST.get('your-name')
        your_phone = request.POST.get('your-phone')
        your_email = request.POST.get('your-email')
        your_service = request.POST.get('your-service')
        your_date = request.POST.get('your-date')
    
        details = Appointment(
            your_name = your_name, 
            your_phone = your_phone, 
            your_email = your_email, 
            your_service = your_service, 
            your_date = your_date)
        details.save()
        return render(request, 'core/appointments.html')

Answer 1

def appointments(request,pk):
    record = get_object_or_404(Service,pk=pk)
    if request.method == 'POST':
        
        form = appointmentsForm(request.POST,request.FILES)
        if form.is_valid():
            appointment= form.save(commit=False)
            appointment.your_service = record
            appointment.save()
            return render(request, 'core/bookappointment.html')
    else:   
        
        return render(request, 'core/appointments.html')