php - Laravel framework MassAssignmentException During Seed Data - php

Question

I have got following issue during seed data in laravel framework.
php artisan db:seed --class=LevelsTableSeeder
[Illuminate\Database\Eloquent\MassAssignmentException]
level
My seed file(LevelsTableSeeder.php) as follows.
<?php
use App\Models\Levels;
use Illuminate\Database\Seeder;
class LevelsTableSeeder extends Seeder {
public function run()
{
$levels = [
['level'=>1, 'xp_second'=>0.101, 'xp_hour'=>365.220],
['level'=>2, 'xp_second'=>0.104, 'xp_hour'=>365.220]
];
foreach($levels as $level) {
Levels::create($level);
}
$this->command->info('Levels seeded :-)');
}
}
And my Levels model file as follows:
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
use Cache;
class Levels extends Model {
protected $table = 'levels';
public function maxLevel()
{
return Cache::get('levels_max_level', function() {
return parent::max('level');
});
}
}
Could you help me?
Regards.

Answer 1

The MassAssignmentException is thrown whenever you try to assign multiple fields in a Model and then create it in a database. In order to protect your database, the Eloquent library offers you the Mass Assignment Protection, which means only fields you allow to be mass assigned will be accepted.
Laravel 5.2 Documentation for Eloquent
Add to your Model the attribute protected $fillable with an array of fields you are interested in mass assigning:
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
use Cache;
class Levels extends Model {
protected $table = 'levels';
protected $fillable = ['level', 'xp_second', 'xp_hour'];
public function maxLevel()
{
return Cache::get('levels_max_level', function() {
return parent::max('level');
});
}
}
Another way to solve this issue is to unguard your model by calling Levels::unguard() from your Seeder Class. That way you will disable the Guard that protects your model from being mass assigned.
<?php
use App\Models\Levels;
use Illuminate\Database\Seeder;
class LevelsTableSeeder extends Seeder {
public function run()
{
Levels::unguard(); // to unguard your model
$levels = [
['level'=>1, 'xp_second'=>0.101, 'xp_hour'=>365.220],
['level'=>2, 'xp_second'=>0.104, 'xp_hour'=>365.220]
];
foreach($levels as $level) {
Levels::create($level);
}
$this->command->info('Levels seeded :-)');
Levels::guard(); // To guard back
}
}
This is an acceptable solution for seeding purposes, but not recommended on controller actions.

Answer 2

You should read the Laravel Docs, Laravel provides protection from Mass Assignment vulnerabilities and so you actually have to tell Laravel which fields are mass assignable inside your model, using the $fillable property:
class Levels extends Model {
protected $fillable = ['level', 'xp_second', 'xp_hour'];
}