我认为出现错误的原因是,您试图将字符串和整数连接起来,这在python中是不可能的,不像javascript。因此,尝试使用str关键字将整数转换为字符串,然后连接。

在models.py文件中添加以下函数。然后运行makemigrations和migrate。在Django1.7上测试

def set_email_as_unique():
    """
    Sets the email field as unique=True in auth.User Model
    """
    email_field = dict([(field.name, field) for field in MyUser._meta.fields])["email"]
    setattr(email_field, '_unique', True)

#this is called here so that attribute can be set at the application load time
set_email_as_unique()