27 March 2014
You don’t need laravel built in validation rules and wish if you could create your own validation rules. Well, fortunately laravel is very flexible as it allows you to build your own validation rules and with a bunch of ways.
The first way to build you own validation rules is to extend validator class with new rules in routes.php file. But first we need to create our form.
<!--app/views/form.blade.php-->
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>
Laravel
</title>
</head>
<body>
<!-- text input field -->
<ul class="errors">
@foreach($errors->get('username') as $error)
<li></li>
@endforeach
</ul>
<br/>
<!-- email input -->
<ul class="errors">
@foreach($errors->get('email') as $error)
<li></li>
@endforeach
</ul>
<br/>
<!-- submit buttons -->
<!-- reset buttons -->
</body>
</html>
Then let’s extend validator class with new rule.
//create foo validation rule
Validator::extend('foo', function($field,$value,$parameters){
//return true if field value is foo
return $value == 'foo';
});
Route::get('form', function(){
//render app/views/form.blade.php
return View::make('form');
});
Route::post('form-submit', function(){
//get all inputs
$inputs = Input::all();
//create array of validation rules
$rules = array('username'=>'required|foo|min:4|max:35','email'=>'required|email');
//set custom error messages
$messages = array(
'foo'=>'Field value must be foo'
);
//validate inputs
$validator = Validator::make($inputs,$rules,$messages);
if($validator->passes()){
//inputs valid
echo 'Well';
}else{
//return to form view with errors
return Redirect::to('form')->withErrors($validator);
}
});
As you can see I used Validator::extend() method to create custom validation rule. The first parameter is the field name, The second parameter is the field value and third is an array of any parameters that have been passed to the rule. If a boolean false returned, Validation fail and error message appear.Then i created two routes, One for form view and another for form validation.
You may also create stand alone class in app/validators/ and pass class name and method to extend() method instead of closure. You will need to create app/validators directory as it doesn’t exist by default, create customValidation.php file then create customValidation class. Each class method represent new validation rule and should passed later to Validator::extend('rule_name','class@method') in routes.php file.
// app/validators/customValidation.php
class customValidation
{
public function foo($field, $value, $parameters){
//return true if field value is foo
return $value == 'foo';
}
}
//app/routes.php
//create foo validation rule
Validator::extend('foo', 'customValidation@foo');
Well, Remember that you will need to update composer.json classmap to include new directory (validators).
"autoload": {
"classmap": [
"app/commands",
"app/controllers",
"app/models",
"app/database/migrations",
"app/database/seeds",
"app/tests/TestCase.php",
"app/validators"
]
},
Then run the following command in your terminals to update autoloading (vendor/composer/autoload_classmap.php). I hope you already have a global install of composer.
$composer dump-autoload
Generating autoload files
Let’s open vendor/composer/autoload_classmap.php to check changes made.
return array(
BaseController' => $baseDir . '/app/controllers/BaseController.php',
/*....*/
'UsersTableSeeder' => $baseDir . '/app/database/seeds/DatabaseSeeder.php',
'customValidation' => $baseDir . '/app/validators/customValidation.php',
);
Now you can use foo rule and add new rules to customValidation class but don’t forget to extend validator class with these rules.