dataobjects.md

Validating DataObjects

Lets say you would like to validate a DataObject called Customer within the App\Models namespace.

Just implement the SilverStripe\Validation\Interfaces\ValidationRules interface and define the rules method.

<?php

namespace App\Models;

use SilverStripe\ORM\DataObject;
use SilverStripe\Validation\Interfaces\ValidationRules;

/**
 * Class Customer
 * @package App\Models
 */
class Customer extends DataObject implements ValidationRules
{
    /**
     * @var array
     */
    private static $db = [
        'Name' => 'Varchar(255)',
        'Age'  => 'Int(2)'
    ];

    /**
     * @return array
     */
    public function rules(): array
    {
        return [
            'Name' => 'required|min_length:2|max_length:255',
            'Age'  => 'required|min:18'
        ];
    }

}

Now whenever we try to insert a Customer into the database, the above validation rules will apply.

// This will result in a validation error 
// because a "Customer" needs to have a Age of at least 18.
Customer::create([
    'Name' => 'John',
    'Age' => 16
])->write();