python - 继承具有验证功能的基本 flask 形式

Question

我有一个 flask 形式，这是代码的一部分:

class BaseForm(FlaskForm):
    username = TextField('Username')
    email = TextField('Email', [validators.Required('Please enter your email address.'), validators.Length(min=6, message=('Too short for an email address?')), validators.Email(message=('Enter a valid email address.'))
    ])
    password = PasswordField('Password')
    register = SubmitField('Register')

class RegisterForm(BaseForm):
    BaseForm.username
    BaseForm.email
    BaseForm.password
    BaseForm.register

当我使用上面的代码时，不会呈现错误消息，但是，当我使用下面的代码时，就会呈现错误:

class BaseForm(FlaskForm):
    username = TextField('Username')
    email = TextField('Email', [validators.Required('Please enter your email address.'), validators.Length(min=6, message=('Too short for an email address?')), validators.Email(message=('Enter a valid email address.'))
    ])
    password = PasswordField('Password')
    register = SubmitField('Register')

class RegisterForm(BaseForm):
    BaseForm.username
    email = TextField('Email', [validators.Required('Please enter your email address.'), validators.Length(min=6, message=('Too short for an email address?')), validators.Email(message=('Enter a valid email address.'))
    ])
    BaseForm.password
    BaseForm.register

所以在我看来，这里的问题是验证没有与字段一起继承或者也许我不明白。我正在努力减少正在编写的代码。 请告诉我如何使用我的第一个代码，或者如果这是不可能的任务，请帮助我实现我正在尝试的表单继承

Answer 1

您的 RegisterForm 没有来自 BaseForm 的新字段。无论如何，不​​要在子类中重新定义字段。也许您应该首先阅读一些编程语言，例如 Python，特别注意继承。

只需这样做:

class BaseForm(FlaskForm):
    username = TextField('Username')
    email = TextField('Email', [validators.Required('Please enter your email address.'), validators.Length(min=6, message=('Too short for an email address?')), validators.Email(message=('Enter a valid email address.'))])
    password = PasswordField('Password')

class RegisterForm(BaseForm):
    register = SubmitField('Register')