What are Flask-WTF forms and how do I use them?

What are Flask-WTF forms and how do I use them?

Flask-WTF is an extension for Flask that simplifies form handling. It integrates WTForms with Flask, allowing you to create and validate forms easily.

Can you show me a simple example of a Flask-WTF form?

Sure! Here's a basic example:

from flask import Flask, render_template, redirect, url_for
from flask_wtf import FlaskForm
from wtforms import StringField, SubmitField
from wtforms.validators import DataRequired

app = Flask(__name__)
app.config['SECRET_KEY'] = 'your_secret_key'

class MyForm(FlaskForm):
    name = StringField('Name', validators=[DataRequired()])
    submit = SubmitField('Submit')

@app.route('/', methods=['GET', 'POST'])
def home():
    form = MyForm()
    if form.validate_on_submit():
        return redirect(url_for('success'))
    return render_template('form.html', form=form)

@app.route('/success')
def success():
    return 'Form submitted successfully!'

if __name__ == '__main__':
    app.run(debug=True)

What do I need to install to use Flask-WTF?

You need to install Flask-WTF and WTForms. You can do this using pip:

pip install Flask-WTF

Are there any built-in validators I can use?

Yes, Flask-WTF provides several built-in validators like DataRequired, Email, Length, and more. You can use them to validate user input easily.