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Flask Academy · Lesson

Define a FlaskForm Class

Declare fields and validators in Python.

Why Flask-WTF

Handling raw form data by hand gets messy fast. Flask-WTF lets you declare a form once as a Python class and reuse it everywhere. 🎯

Install the Extension

Flask-WTF wraps the WTForms library and adds CSRF protection. Install it with pip before you write a single field.

pip install Flask-WTF

All lessons in this course

  1. Define a FlaskForm Class
  2. Render and Submit a Form
  3. validate_on_submit and CSRF Tokens
  4. Custom Validators and Field Errors
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