Tornado Web 开发 框架搭建 (3)

Form验证

在使用wtforms 的时候，依然需要继承 wtform 针对tornado重写一下里面的一些方法

参考http://lepture.com/work/tornado-ext

 

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from wtforms.ext.i18n.form import Form as wtForm class Form(wtForm): """ Using this Form instead of wtforms.Form Example:: class SigninForm(Form): email = EmailField('email') password = PasswordField('password') class SigninHandler(RequestHandler): def get(self): form = SigninForm(self.request.arguments) """ LANGUAGES = [ 'zh' ] def __init__( self , formdata = None , obj = None , prefix = '', * * kwargs): super (Form, self ).__init__(formdata, obj, prefix, * * kwargs) def process( self , formdata = None , obj = None , * * kwargs): if formdata is not None and not hasattr (formdata, 'getlist' ): formdata = TornadoArgumentsWrapper(formdata) super (Form, self ).process(formdata, obj, * * kwargs) class TornadoArgumentsWrapper( dict ): def __getattr__( self , key): try : return self [key] except KeyError: #raise AttributeError return None def __setattr__( self , key, value): self [key] = value def __delattr__( self , key): try : del self [key] except KeyError: raise AttributeError def getlist( self , key): try : values = [] for v in self [key]: v = to_unicode(v) #if isinstance(v, unicode): v = re.sub(r "[\x00-\x08\x0e-\x1f]" , " " , v) values.append(v) return values except KeyError: #raise AttributeError return []

这里的基类用的是i18n的，目地是为了让wtforms的内制验证错误能本地化

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1	LANGUAGES = [ 'zh' ]

Form类里面也需要加上这句话，基本报错信息会变成中文的

初始化Form的时候，传入 tornado 的 request.arguments,

像这样

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class LoginForm(Form): name = TextField( 'user' , [Required( '用户名不能为空' ), ]) pwd = PasswordField( 'pwd' , [Required( '密码不能为空' ), ]) remember = BooleanField( 'rem' )

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1	form = LoginForm( self .request.arguments)

之后调用 form.validate() 验证结果就出来了。

取 数据 可以: name = form.name.data

error的话: form.name.error