'Member' 对象没有属性 'all'

Question

我的模型定义为：

class MembershipHistory(models.Model):
    mem_name = models.ForeignKey(Member, on_delete=models.CASCADE, related_name='mem_number')
    project_number = models.IntegerField()
    project_name = models.CharField(max_length=200)
    evaluator_remark = models.TextField(null=True, blank=True)

这是我制作的另一个模型 ForeignKey

class Member(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    name = models.CharField(max_length=200)
    membership_number = models.CharField(max_length=10)

我将我的表格定义为

class MembershipHistoryForm(forms.Form):
    def __init__(self,*args, **kwargs):
        self.user = kwargs.pop('user')
        super(MembershipHistoryForm, self).__init__(*args, **kwargs)
        self.fields['mem_name'].queryset = Member.objects.get(user=self.user)
   #mem_name = forms.ModelChoiceField(empty_label="NAME")

    class Meta:
        model = MembershipHistory
        fields = '__all__'
        widgets = {
            'project_number':forms.TextInput(attrs={'placeholder':'Project Number'}),
            'project_name':forms.TextInput(attrs={'placeholder':'Project Name'}),
            'evaluator_remark':forms.Textarea(attrs={'placeholder':'Evaluator Remark'}),
        }

现在，每当我实例化表单时，我都不会收到以下错误

Django Version: 1.10.4
Exception Type: AttributeError
Exception Value: 'Member' object has no attribute 'all'

关于错误在哪里的任何想法？

Answer 1

如果您检查适当的 django 文档部分，您可以看到

get()

get(**kwargs)

Returns the object matching the given lookup parameters

这意味着它在适当的情况下返回一个对象而不是 queryset，但form需要 queryset 所以而不是使用get方法 use filter。

self.fields['mem_name'].queryset = Member.objects.filter(user=self.user)