Question

我正在使用常规/来宾用户处理我的Checkout视图，但却很难解决完整性错误。想法是让访客用户仅通过电子邮件注册结账，我需要将用户电子邮件设置为唯一。

models.py

from django.conf import settings
from django.db import models

class UserCheckout(models.Model):
    user = models.OneToOneField(settings.AUTH_USER_MODEL, null=True, blank=True)
    email = models.EmailField(unique=True)

    def __unicode__(self):
        return self.email

forms.py

from django import forms
from django.contrib.auth import get_user_model

User=get_user_model()
class GuestCheckoutForm(forms.Form):
    email = forms.EmailField()
    email2 = forms.EmailField(label='Verify Email')
    def clean_email2(self):
        email = self.cleaned_data.get("email")
        email2 = self.cleaned_data.get("email2")
        if email == email2:
            user_exists = User.objects.filter(email=email).count()
            if user_exists != 0:
                raise forms.ValidationError("User already exists. Please login instead")
            return email2
        else:
            raise forms.ValidationError("Please confirm emails addresses are the same.")

在我的购物车视图中，这是我呈现表单的方式。

def post(self, request, *args, **kwargs):
        self.object = self.get_object()
        form = self.get_form()
        if form.is_valid():
            email = form.cleaned_data.get("email")
            user_checkout = UserCheckout.objects.create(email=email)
            return self.form_valid(form)
        else:
            return self.form_invalid(form)

我已经使用admin注册了该模型，并且在admin中它显示了重复的错误完全正常，但是从前端我收到错误：

IntegrityError at /checkout/
column email is not unique
Request Method: POST
Request URL:    http://localhost:8000/checkout/
Django Version: 1.8.13
Exception Type: IntegrityError
Exception Value:    
column email is not unique
Exception Location: C:\Users\Ali\ecomm\lib\site-packages\django\db\backends\sqlite3\base.py in execute, line 318
Python Executable:  C:\Users\Ali\ecomm\Scripts\python.EXE
Python Version: 2.7.9

Answer 1

每次结帐时都会创建新的UserCheckout。在所有这些条目中，只允许每封电子邮件只存在一次。

我不认为你想要这个。因为如果客人订购了两次，则不允许，因为他的电子邮件已经在数据库中。这就是你得到这个错误的原因。

Answer 2

clean_<fieldname>的{{1}}方法用于执行相对于单个字段的验证。如果您需要访问多个字段的验证，请使用Form方法。有关详细说明，请查看表单验证documentation。

这会给：

clean

编辑：我相信我发现了为什么你有一个class GuestCheckoutForm(forms.Form): email = forms.EmailField() email2 = forms.EmailField(label='Verify Email') def clean_email(self): email = self.cleaned_data["email"] if User.objects.filter(email=email).exists(): raise forms.ValidationError("Please confirm emails addresses are the same.") return email def clean(self): cleaned_data = super(GuestCheckoutForm, self).clean() email = cleaned_data.get('email') email2 = cleaned_data.get('email2') if email and email2 and email != email2: self.add_error('email2', forms.ValidationError('Please confirm emails addresses are the same.'))：您确认数据库中没有给定电子邮件的IntegrityError，您还应该验证数据库中没有包含给定电子邮件的其他User。将UserCheckout替换为if User.objects.filter(email=email).exists():

Django IntegrityError电子邮件不是唯一的

2 个答案: