July 2019
Beginner to intermediate
302 pages
9h 38m
English
Content preview from Flask Framework Cookbook - Second Edition
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Validating fields on the server side
We have forms and fields, but we need to validate them in order to make sure that only the correct data goes through to the database, and that errors are handled beforehand, rather than corrupting the database. These validations can also prevent the application against cross-site scripting (XSS) and CSRF attacks. WTForms provides a whole lot of field types that themselves have validations written for them by default. Apart from these, there are a bunch of validators that can be used on the basis of choice and need. In this recipe, we will use a few of them to understand the concept.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.