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Flask: Develop Web Applications in Python

Solution: Rendering a Sign-Up Form

Explore building a secure sign-up form in Flask by implementing Flask-WTF forms with field validation such as password confirmation and email checks. Understand how to integrate form schemas, render the form in templates, and apply CSRF protection for safe user input handling.

We'll cover the following...

We can analyze the complete architectural implementation by inspecting our updated files. We isolate our structural blueprint definition cleanly within our asset module file.

Python 3.14.0
from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, SubmitField
from wtforms.validators import InputRequired, Email, EqualTo
class LoginForm(FlaskForm):
    email = StringField('Email', validators=[InputRequired(), Email()])
    password = PasswordField('Password', validators=[InputRequired()])
    submit = SubmitField('Login')
    
class SignUpForm(FlaskForm):
    full_name = StringField('Full Name', validators=[InputRequired()])
    email = StringField('Email', validators=[InputRequired(), Email()])
    password = PasswordField('Password', validators=[InputRequired()])
    confirm_password = PasswordField('Confirm Password', validators=[InputRequired(), EqualTo('password')])
    submit = SubmitField('Sign Up')

  • Line 3: We imported the EqualTo validator to verify the password.

  • Lines 10–11: We establish our custom SignUpForm class ...