Flask-wtforms中的Trim空格

Question

我有一些字符串字段，我想避免使用任何空格。在Flask-wtforms中如何做到这一点？

class RegistrationForm(FlaskForm):
    first_name = StringField('First name',validators=[DataRequired(),Length(min=2,max=64)])
    last_name = StringField('Last name',validators=[DataRequired(),Length(min=2,max=64)])

Answer 1

尝试Regexp：

validators.Regexp('^\w+$', message="Username must contain only letters numbers or underscore"),

http://wtforms.simplecodes.com/docs/0.6.1/validators.html#wtforms.validators.Regexp