"对于带有基数10的int()的无效文字:"但是无法理解为什么它正在访问整数

Question

我无法理解为什么在我的应用程序中我收到此错误.由于所有主键都是文本字段是整数.这是我的代码:
forms.py

 class EventAttendForm(forms.Form):
     talk = forms.ModelChoiceField(queryset=Talk.objects.all())
     membersAttended = forms.ModelMultipleChoiceField(queryset=Member.objects.all())

models.py

 class Talk(models.Model):
     title = models.CharField(max_length=200, primary_key=True)  
 class Member(models.Model):
     name = models.CharField(max_length=200)
     membership_number = models.CharField(max_length=200, primary_key=True)
     talks = models.ManyToManyField(Talk, through='Event_Attendance')
 class Event_Attendance(models.Model):
     talk = models.ForeignKey('Talk')
     membersAttended = models.ForeignKey('Member')

views.py

 def addAttendance(request):
     #eventAttendanceForm
     if request.method == 'POST':
          eventAttendForm = EventAttendForm(request.POST)
      for member in request.POST['membersAttended']:
            ea = Event_Attendance(request.POST['talk'], member)
            ea.save()
    return HttpResponseRedirect('../../../talks/')      
else:
    eventAttendForm = EventAttendForm()
    return render_to_response('attendance/addAttendance.html',{'eventAttendForm': eventAttendForm})

我不明白为什么我会收到这个错误.确切的错误是:

 Exception Type:    ValueError
 Exception Value:   invalid literal for int() with base 10: 'redirectTest'

RedirectTest是我用我的表单为add talk创建的一个Talk,用于检查重定向是否正常工作.它所说的代码行引起的问题是ea.save()
提前感谢,
Dean

Answer 1

考虑一下这条线

ea = Event_Attendance(request.POST['talk'], member)

您正在创建模型的实例Event_Attendance.构造函数期望第一个参数是一个实例Talk.相反,你正在为它提供一个字符串,这是谈话的标题.

快速修复是Talk使用匹配的标题查找实例并将其作为参数传递给构造函数.像这样的东西:

talk = Talk.objects.get(title = request.POST['talk'])
ea = Event_Attendance(talk = talk, membersAttended = member)
ea.save()

这可行,但不是最好的方法.首先,DoesNotExist如果Talk找不到给定标题,则第一行总是可以引发a .其次,您POST直接访问变量而不是使用它Form来验证它们.

因此,更好的答案是:

eventAttendForm = EventAttendForm(request.POST.copy())
if eventAttendForm.is_valid():
    talk = eventAttendForm.cleaned_data['talk']
    membersAttended = eventAttendForm.cleaned_data['membersAttended']

    for member in membersAttended:
        ea = Event_Attendance(talk = talk, membersAttended = member)
        ea.save()