Freek.dev

Laravel / PHP / AI

validation

All my posts about validation.

php laravel best practices form requests form

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Multiple forms with same input names on one page

– stefanbauer.me

Stefan Bauer explains how to handle error message when you have multiple forms on one page

Here's another tip! Even if it's documented here I just wanted to show it. Here's the deal: Imagine you have multiple forms one page. For example one contact form and another newsletter signup form. Both of them might have an email field. So who do you know which email field doesn't validate and throws an error?

Read more [stefanbauer.me]

Make a clear distinction between different layers of validation

In an older, but still very interesting article, Mattias Verraes has some interesting thoughts on form, command and model validation.

Many of the frameworks I’ve worked with, promise to separate responsibilities with MVC. In practice, they end up coupling everything to everything. The forms are coupled to the models, and there’s a grand unified validation layer. This may be convenient at first, but it breaks down for larger systems, and creates headaches when having to support multiple clients. My approach is to clearly separate the validation for the form itself, from the Command validation and the model validation.

http://verraes.net/2015/02/form-command-model-validation/

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Native HTML5 form validation in 6 lines of code

Dave Rupert, lead developer at Paravel, shows how you can leverage native form validation and still style your errors using only a couple of lines of JavaScript.

If you’ve ever experimented with HTML5 Form Validation, you’ve probably been disappointed. The out-of-box experience isn’t quite what you want. Adding the required attribute to inputs works wonderfully. However the styling portion with input:invalid sorta sucks because empty inputs are trigger the :invalid state, even before the user has interacted with the page. I finally sat down and spent a couple days trying to make HTML5 Form Validation work the way I want it.

https://daverupert.com/2017/11/happier-html5-forms/

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Conditionally adding rules to a validator in Laravel

Mohamed Said explains the not so well known sometimes validation rule in Laravel.

Laravel's validation library is very powerful and easy to use, using a few keystrokes you can build a strong defence around your application, preventing invalid user input from corrupting the application flow and potentially introducing bugs.

...

In this post I'd like to highlight a trick related to conditionally adding validation rules.

http://themsaid.com/laravel-advanced-validation-conditionally-adding-rules-20170110/

To learn more read the relevant section in the Laravel docs.

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Some request filtering macros

In a gist on GitHub Adam Wathan shares some macros that can be used to clean up a request.

Allows you to trim things, lowercase things, whatever you want. Pass a callable or array of callables that each expect a single argument: 
Request::macro('filter', function ($key, $filters) {
    return collect($filters)->reduce(function ($filtered, $filter) {
        return $filter($filtered);
    }, $this->input($key));
});

https://gist.github.com/adamwathan/610a9818382900daac6d6ecdf75a109b

If you want to hear Adam talk some more about troubles with requests (generated by webforms) and possible solutions, listen to this episode of the Full Stack Radio Podcast.

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Normalize your values on input

Sebastian De Deyne on his blog:

Dynamic languages allow us to pass anything as a parameter without requiring a specific type. In turn, this means we often need to handle some extra validation for the data that comes in to our objects.

This is a lightweight post on handling your incoming values effectively by normalizing them as soon as possible. It's a simple guideline worth keeping in mind which will help you keep your code easier to reason about.

https://sebastiandedeyne.com/posts/2016/normalize-your-values-on-input

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Validate (almost) anything in Laravel original

by Freek Van der Herten – 1 minute read

Laravel ships with some good validation capabilities. Form request validation is a nice way to make sure http requests pass valid data. To validate stuff that enters the application in some other way validators can be created manually. Unfortunately this is kinda verbose: $validator =…

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