Flask Framework Cookbook - Second Edition

Webforms with WTForms

Form handling is an integral part of any web application. There can be innumerable cases that make the presence of forms in any web app very important. Some cases may include situations where users need to log in or submit some data or cases where applications might require inputs from users. As much as the forms are important, their validation holds equal importance, if not more. Presenting this information to users in an interactive fashion adds a lot of value to the application.

There are various ways in which we can design and implement forms in a web application. With the advent of Web 2.0, form validation and communicating the correct messages to the user have become very important. Client-side validations can ...