Question

在Django 1.6和crispy表单中，我试图在用户提交后添加从API调用返回的forum_id_number。但是，我得到了一个

Exception Value:    
'int' object has no attribute 'required'

提交表格后

。我已经确认self.fields['forum_id_number'] = response["User"]["Id"]导致此问题。

class AccountForm(forms.ModelForm):
    class Meta:
        model = Employee

    def __init__(self, *args, **kwargs):
        super(AccountForm, self).__init__(*args, **kwargs)
        self.helper = FormHelper()
        self.helper.form_class = 'form-horizontal'
        self.helper.label_class = 'col-lg-2 control-label'
        self.helper.field_class = 'col-lg-4'

        self.helper.layout = Layout(
            Fieldset('Account Modify',
                'irc_name',
                'forum_username',
                Hidden('user_assigned', '{{ user.pk }}'),
                Hidden('forum_id_number', '0'),
                ),

            FormActions(
                Submit('submit', 'Submit', css_class='btn-primary')
                )
         )

    def clean_forum_username(self):
        data = self.cleaned_data['forum_username']
        SLUG = "users/" + data + ".json"
        status_code, response = do_request(SLUG)
        if status_code != 200:
            raise forms.ValidationError("Your username was not"
                                        " found! Please check the"
                                        " the spelling. Also, your"
                                        " forum username is your"
                                        " forum sign in name.")
        elif status_code == 200:
            self.fields['forum_id_number'] = response["User"]["Id"]
        return data

class Employee(models.Model):
    user_assigned = models.ForeignKey(settings.AUTH_USER_MODEL,
            related_name='r_assigned')
    irc_name = models.CharField(max_length="25",
            unique=True)
    forum_id_number = models.BigIntegerField(unique=True)
    forum_username = models.CharField(max_length="50",
            unique=True)

    def __unicode__(self):
        return self.irc_name

Answer 1

self.fields['forum_id_number']是forms.Field子类的实例。它描述了属性self.forum_id_number。行self.fields['forum_id_number'] = response["User"]["Id"]将覆盖此字段描述并将其设置为(Big?)Integer对象的实例。这个实例当然没有属性required。

为forum_id_number设置值的“正确”方法是使用self.forum_id_number = response["User"]["Id"]或self.cleaned_data['forum_id_number'] = response["User"]["Id"]。

正确是引号，因为在这种情况下，它确实不是正确的方法。无法知道是否已在任何forum_id_number方法中清除了字段clean_FIELD，因此您不知道是应该设置self.forum_id_number还是self.cleaned_data['forum_id_number']。现在在forum_id_number的情况下，没有安全问题，但任何使用Firebug或类似内容的人都可以更改user_assigned的值。通常最好从表单中排除隐藏字段，并在表单的save方法中设置实例本身的值。当然，您无法在ValidationError方法中提出save（嗯，您可以，但它会生成500 Internal Server Error），因此您必须获取用户ID在clean_forum_username方法中：

class AccountForm(forms.ModelForm):
    ....
    def clean_forum_username(self):
        data = self.cleaned_data['forum_username']
        SLUG = "users/" + data + ".json"
        status_code, response = do_request(SLUG)
        if status_code != 200:
            raise forms.ValidationError("Your username was not"
                                        " found! Please check the"
                                        " the spelling. Also, your"
                                        " forum username is your"
                                        " forum sign in name.")
        elif status_code == 200:
            self.response = response
        return data

    def save(self, *args, **kwargs):
        # self.response should be valid, otherwise a `ValidationError` would've been raised
        self.instance.forum_id_number = self.response['User']['Id']
        return super(AccountForm, self).save(*args, **kwargs)

Django Form＆＃39; int＆＃39;对象没有属性＆＃39; required＆＃39;对于在函数中添加的字段

1 个答案: