Django - forms.py 验证问题答案

【问题标题】：Django - forms.py validation issuesDjango - forms.py 验证问题
【发布时间】：2016-05-09 03:18:52
【问题描述】：

我的表单验证有问题，我创建了验证电子邮件是否存在的方法，因此，如果它确实存在，则数据无法保存在数据库中，但在我个人的情况下，它无论如何都会保存它

这是我的代码：

models.py：

from django.db import models
from promSpace.models import Space

class StudentRegistration(models.Model):
    email = models.EmailField(max_length=50)
    first_name = models.CharField(max_length=20)
    last_name = models.CharField(max_length=20)
    password = models.CharField(max_length=20, default="", null=False)
    prom_code = models.CharField(max_length=8, default="", null=False)
    gender = (
    ("M","Male"),
    ("F","Female"),
    )
    gender = models.CharField(max_length=1, choices=gender, default="M", null=False)
    prom_name = models.CharField(max_length=20, default="N/A")

forms.py：

from django import forms            
from django.contrib.auth.models import User   
#from models import StudentRegistration
from django.forms import ModelForm
from promSpace.models import Space
from StudentUsers.models import StudentRegistration
from django.contrib.auth.forms import UserCreationForm  



class MyRegistrationForm(forms.ModelForm):
    password = forms.CharField(widget=forms.PasswordInput)
    password2 = forms.CharField(widget=forms.PasswordInput)
    prom_code = forms.CharField(max_length = 8)
    email = forms.EmailField(max_length=50)

    def email_al_exist(self):
        email = self.cleaned_data['email']
        if StudentRegistration.objects.filter(email = email).exists():
            raise ValidationError("Email already exists")
        return email


    def clean_password2(self):
        password = self.cleaned_data.get('password')
        password2 = self.cleaned_data.get('password2')
        if password and password2:
            if password != password2:
                raise forms.ValidationError(("The two password fields didn't match."))
        return password2


    def prom_code_exist(self):
        prom_code_value = self.cleaned_data['prom_code']
        prom_code_ver = Space.objects.get(prom_code = prom_code_value)
        if Space.objects.filter(prom_code = prom_code_value).exists():
            return prom_code_value
        else:
            raise forms.ValidationError(("Error, Code doesn't exist."))


    class Meta:
        model = StudentRegistration
        fields = ('email', 'first_name', 'last_name','gender','prom_code','password')

观察：我在这里创建的用户被保存在他们自己的表中（StudentRegistration），他们与auth_user（默认）没有关系

【问题讨论】：

标签： django python-2.7 validation django-forms

【解决方案1】：

您的 email_al_exist 方法永远不会被调用。无论如何，肯定不在您在此处发布的代码中。您或许应该将其重命名为 clean_email。

def clean_email(self):
    email = self.cleaned_data['email']
    if StudentRegistration.objects.filter(email = email).exists():
        raise ValidationError("Email already exists")
    return email

【讨论】：