python - 如何在保存之前更改 Django 表单字段值？

Question

if request.method == 'POST':
    userf = UsersModelForm(request.POST)
    username = userf.data['username']
    password = userf.data['password']
    passwordrepeat = userf.data['passwordrepeat']
    email = userf.data['email']

我试过了:

    tempSalt = bcrypt.gensalt()
    password = bcrypt.hashpw(password,tempSalt)
    passwordrepeat = bcrypt.hashpw(passwordrepeat,tempSalt)

    userf.data['password'] = password
    userf.data['passwordrepeat'] = passwordrepeat

但我得到了错误。如何在保存之前更改 userf.data['password'] 和 userf.data['passwordrepeat'] 的值？

错误:

AttributeError at /register

This QueryDict instance is immutable

Request Method:     POST
Request URL:    http://127.0.0.1:8000/register
Django Version:     1.3.1
Exception Type:     AttributeError
Exception Value:    

This QueryDict instance is immutable

Exception Location:     /usr/local/lib/python2.6/dist-packages/django/http/__init__.py in _assert_mutable, line 359
Python Executable:  /usr/bin/python
Python Version:     2.6.6
Python Path:    

['/home/user1/djangoblog',
 '/usr/lib/python2.6',
 '/usr/lib/python2.6/plat-linux2',
 '/usr/lib/python2.6/lib-tk',
 '/usr/lib/python2.6/lib-old',
 '/usr/lib/python2.6/lib-dynload',
 '/usr/local/lib/python2.6/dist-packages',
 '/usr/lib/python2.6/dist-packages',
 '/usr/lib/python2.6/dist-packages/gst-0.10',
 '/usr/lib/pymodules/python2.6',
 '/usr/lib/pymodules/python2.6/gtk-2.0']

Answer 1

如果你需要在保存之前对数据做一些事情，只需创建一个函数，如:

def clean_nameofdata(self):
    data = self.cleaned_data['nameofdata']
    # do some stuff
    return data

您只需要创建一个名称为 **clean_***nameofdata* 的函数，其中 nameofdata 是字段的名称，因此如果要修改密码字段，您需要:

def clean_password(self):

如果需要修改密码重复

def clean_passwordrepeat(self):

所以在里面，只需加密您的密码并返回加密后的密码。

我的意思是:

def clean_password(self):
    data = self.cleaned_data['password']
    # encrypt stuff
    return data

因此，当您验证表单时，密码将被加密。