AttributeError：“模块”对象没有属性

AttributeError：“模块”对象在模型中没有属性“OneDay”代码：

class OneDay(models.Model):
    Author = models.ForeignKey('Profile')
    WhatYouWant = models.ForeignKey('Question')
    Date = models.DateField()
    WhatYouDo = models.TextField()
    Fillings = models.TextField()
    Events = models.TextField()
    Results = models.TextField()
    def __unicode__(self):
        return self.WhatYouWant

class OneDayForm(ModelForm):
   class Meta:
       model = OneDay
       fields = ['WhatYouDo', 'Fillings', 'Events', 'Results']

鉴于：

from polls.models import Poll, Profile, OneDayForm
def oneday(request):
    template_name = 'polls/oneday.html'
    onday = OneDayForm()
    return render_to_response(template_name, {"OneDay": onday}, RequestContext(request))

在网址中：

url(r'^one_day', views.OneDay, name='the_day'),   

我正在学习如何使用表格。我看，我看，一切似乎都是正确的，但错误就是一切。她到底是什么意思？