Django Python 电子邮件验证在多个用户之间没有共享电子邮件

Question

I am needing to know what code I need to put into my models.py (validations) so that when a user goes to register for a new account, that if they input a value into the email field that is already in the Data Base, that they get an error.

class UserManager(models.Manager): def user_registration_validator(self, post_data): errors = {} EMAIL_REGEX = re.compile(r'^[a-zA-Z0-9.+ -]+@[a-zA-Z0-9. -]+.[a-zA-Z]+$')

    if len(post_data['first_name']) < 3:
        errors['first_name'] = "First name must be 3 characters"

    if post_data['first_name'].isalpha() == False:
        errors['first_name'] = "letters only"

    if len(post_data['last_name']) < 3:
        errors['last_name'] = "Last name must be 3 characters"

    if post_data['last_name'].isalpha() == False:
        errors['last_name'] = "letters only"

    if len(post_data['email']) < 8:
        errors['email'] = "Email must contain 8 characters"
    
    #if post_data['email'].Books.objects.filter(title=post_data) == True:
       # errors['email'] ="this email already exist in database"

    if post_data['email'].find("@") == -1:
        errors['email'] = "email must contain @ and .com"

    if post_data['email'].find(".com") == -1:
        errors['email'] = "email must contain @ and .com"
    
    # test whether a field matches the pattern
    if not EMAIL_REGEX.match(post_data['email']):
        errors['email'] = "Invalid email address!"

    if post_data['password'] != post_data['confirm_password']:
        errors['pass_match'] = "password must match confirm password"

    if len(post_data['password']) < 8:
        errors['pass_length'] = "password must be longer than 8 characters"

    return errors

Answer 1

在您的模型中添加一个如下所示的字段：

user_email = models.EmailField(unique=True)