How to bypass mass assignment protection in laravel?

laravel-mass-assignment.php

<?php

class Article extends \Illuminate\Database\Eloquent\Model
{
    /**
     *  All available model properties ( DB fields )
     *
     * @var array $schema
     */
    protected $schema = [
        0 => 'id',
        1 => "title",
        2 => "body",
        3 => "state"
    ];
    /**
     * The attributes that are mass assignable.
     *
     * @var array $fillable
     */
    protected $fillable = [
        0 => "title",
        1 => "body"
    ];

}

// ------- Case 1 ---------
// When user creates article
$article = Article::create(Input::all());

// ------- Case 2 ---------
// Internal application case ( for example import case )
// I want to bypass $fillable and be able to set ID manually
Article::unguard();
$article = Article::create(['id' => 1, 'title' => 'title', 'body' => 'body']);
Article::reguard();

// ------- Case 2 ---------
// Allow user be able fill title and body attributes
// And internally set state attribute as active
$article = Article::create(Input::all());

// ------- Case 3 ---------
// Allow user be able fill title and body attributes
// This user is administrator and allow him fill state attribute as well?
if (user() == 'admin') {
    $article->fillable[] = "state"; // is it a right way to allow him fill state attribute?
}
$article = Article::create(Input::all());

Helped a lot! Thanks! Worked on Laravel 7.