Question

我已经定义了以下自定义验证器：

class DataRequiredCustom(object):
    def __init__(self, login_signup='signup', message='Data should be provided'):
        self.login_signup = login_signup
        self.message = message

    def __call__(self, form, field):
        if self.login_signup == 'signup':
            return DataRequiredCustom(message=self.message)

data_required_custom = DataRequiredCustom

现在我的表单类：

class LoginRegistrationForm(Form):
    email = StringField('Email', validators=[DataRequired(), Length(1, 64), Email()])
    displayname = StringField('displayname', validators=[data_required_custom(self.login_signup), Length(1, 64)])
    password = PasswordField('Password', validators=[DataRequired()])
    password2 = PasswordField('Confirm password', EqualTo('password'), validators=[data_required_custom(self.login_signup)])

    submit_register = SubmitField('Register')
    submit_login = SubmitField('Log In')

    def __init__(self, login_signup='signup'):
        super(LoginRegistrationForm, self).__init__()
        self.login_signup = login_signup

如果参数displayname等于password2，则不得验证字段login_signup和'signup'。不幸的是，将参数self.login_signup传递给自定义验证类data_required_custom会产生错误：

NameError：未定义名称“self”。

如何将参数传递给验证表单？

更新
我的模板上有两个以下表格：

<div class="simple-register">
    <form action="{{ url_for('auth.signup') }}" method="POST"/>
    {{ form.email(type="email") }} <br/>
    {{ form.displayname(type="text") }} <br/>
    {{ form.password(type="password") }} <br/>
    {{ form.password2(type="password") }} <br/>
    {{ form.submit_register(type="submit", value="SignUp") }}
    </form>
</div>

和

<form action="{{ url_for('auth.login') }}" method="POST">
    {{ form.email() }} <br/>
    {{ form.password() }} <br/>
    {{ form.submit_login(type="submit", value="Login"}}
</form>

Answer 1

您正在类初始化块中传递self，但尚未存在self。尝试将代码移动到init方法。

class LoginRegistrationForm(Form):
    def __init__(self, login_signup='signup'):
        super(LoginRegistrationForm, self).__init__()
        self.login_signup = login_signup
        self.email = StringField('Email', validators=[DataRequired(), Length(1, 64), Email()])
        self.displayname = StringField('displayname', validators=[data_required_custom(self.login_signup), Length(1, 64)])
        self.password = PasswordField('Password', validators=[DataRequired()])

        self.password2 = PasswordField('Confirm password', EqualTo('password'), validators=[data_required_custom(self.login_signup)])

        self.submit_register = SubmitField('Register')
        self.submit_login = SubmitField('Log In')

如何使用复杂的验证器根据外部参数使用WTForms包定义表单？

1 个答案: