[Python] Errors with Flask-WTF, validators

The code is as follows:

wtf.py:

from flask import Flask, render_template, redirect, url_for, request, flash
from forms import MyForm
from flask_wtf import CSRFProtect

app = Flask(__name__)
app.config['SECRET_KEY'] = 'KERNEL?:65535)/TCP.SEC'
csrf = CSRFProtect(app)
@app.route('/home', methods=['GET','POST'])
def home():
form = MyForm()#Se crea una instancia de la clase de formulario.
if form.validate_on_submit():
return 'User: {form.user.data}<br>Password: {form.password.data}<br>'
print(request.method)
print(form.validate_on_submit())
return render_template('wtf.html', form=form)

@app.route('/profile', methods=['GET', 'POST'])
def profile():
if request.method == 'POST':
username = request.form.get('name')
password = request.form.get('password')
return f'Username: {username}<br>Password: {password}'
else:
return 'Nothing to show here, bro.'
if __name__ == '__main__':
app.run(debug=True)


wft.html:

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>WTForm</title>
<style>
body{
background-color: #2B2D42;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
margin: 0;
height: 100vh;
}
*{
color: #92DCE5;
}
.main{
font-size: 1.5em;
font-weight: 1500;
}
form p input{
color: black;
}
form p label{
color: #FF66D8;
}
form p input:focus{
outline: none;
}
</style>
</head>
<body>
<p class="main">Flask WTF</p>
<form action="{{ url_for('profile') }}" method="post">
{{ form.hidden_tag() }}
<p>{{ form.name.label }} {{ form.name() }}</p>
<p>{{ form.password.label }} {{ form.password() }}</p>
<p>{{ form.password_confirmation.label }} {{ form.password_confirmation }}</p>
<p>{{ form.submit() }}</p>
</form>
</body>
</html>


form.py:

from flask_wtf import FlaskForm
from wtforms import StringField, SubmitField, PasswordField
from wtforms.validators import DataRequired, length, EqualTo

class MyForm(FlaskForm):
name = StringField('Name', validators=[DataRequired()])
password = PasswordField('Password', validators=[DataRequired(),length(min=8, max=16)])
password_confirmation = PasswordField('Confirm', validators=[DataRequired(), EqualTo('password', message='Must be equal to first password')])
submit = SubmitField('Send username')



The main problem is that the EqualTo() validator (in form.py) doesn't work as it's supposed to since it doesn't throw any warning if the password is incorrect (which by the way, I already tried) and the page is simply submitted, but another problem is that the form should send the request as a POST, however, in the /home view I can't capture that method (I think that's the problem).

Additional information:

Flask 3.1.0
Flask-WTF 1.2.2
Werkzeug 3.1.3
WTForms 3.2.1

Continue reading...