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Mafys Grif
Mafys Grif

Reputation: 577

Laravel, valdiation alpha_dash prevent dashes

I have validation rule:

$rules = ['username' => 'required|string|alpha_dash']

I need prevent dash in validation, allow only underscores, letters and numbers. How I can do it? Now alpha_dash allow dashes..

Upvotes: 4

Views: 9694

Answers (4)

dongsir
dongsir

Reputation: 11

Try this rule instead of alpha_dash

[
    'username' => ['regex:/^[0-9a-zA-Z_\-]*$/']
]

Upvotes: 1

Tharaka Dilshan
Tharaka Dilshan

Reputation: 4499

Aside from the other answers, You can create custom validation rule

following artisan command will create a new rule in the app\Rules\ folder.

php artisan make:rule AlphaNumeric

AlphaNumeric

class AlphaNumeric implements Rule
{
    public function passes($attribute, $value)
    {
        return preg_match('/^[A-Za-z0-9_]+$/', $value);
    }

    public function message()
    {
       return 'your custom error message.';
    }
}

Controller

$rules = [
    'username' => ['required', 'string', new AlphaNumeric()]
]

This approach can be use to create more complex and flexible validations.

Upvotes: 2

A l w a y s S u n n y
A l w a y s S u n n y

Reputation: 38502

I would suggests to use regex validation to get more power to customize in future if you wish. SEE https://laravel.com/docs/5.8/validation#rule-regex

'regex:/^[A-Za-z0-9_]+$/'

or more specifically 

$rules = ['username' => 'required|string|regex:/^[A-Za-z0-9_]+$/']

Because as per documentation alpha_dash supports-

The field under validation may have alpha-numeric characters, as well as dashes and underscores.

Upvotes: 7

Mohammad Hosseini
Mohammad Hosseini

Reputation: 1807

You can use regex:pattern in your validation.

$rules = ['username' => 'required|string|regex:/^[A-Za-z0-9_.]+$/']

Upvotes: 3

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