wtforms-based User Registration Form Validation

This code uses the wtforms library and its components such as Form, StringField, PasswordField, BooleanField, and validators like InputRequired, Length, Email, Regexp, and EqualTo.

Technology Stack : 代码所使用到的包和技术栈[英文]

Code Type : The type of code

Code Difficulty : Intermediate

                
                    
from wtforms import Form, StringField, PasswordField, BooleanField
from wtforms.validators import InputRequired, Length, Email, Regexp, EqualTo

def validate_username(username):
    if len(username) < 3 or len(username) > 15:
        raise ValueError("Username must be between 3 and 15 characters.")

def validate_password(password):
    if len(password) < 6:
        raise ValueError("Password must be at least 6 characters long.")

def create_user_registration_form():
    class RegistrationForm(Form):
        username = StringField('Username', validators=[InputRequired(), Length(min=3, max=15), validate_username])
        email = StringField('Email', validators=[InputRequired(), Email(message="Invalid email address")])
        password = PasswordField('Password', validators=[InputRequired(), Length(min=6, message="Password must be at least 6 characters long")])
        confirm_password = PasswordField('Confirm Password', validators=[InputRequired(), EqualTo('password', message="Passwords must match")])

    return RegistrationForm()