find and update in laravel eloquent code example

Example 1: laravel fillable

/**
     * The attributes that are mass assignable.
     */
    protected $fillable = [
      					   'title',
                           'slug',
                           'body',
                           'image',
                           'published',
                           'comments_open'
                          ];

Example 2: laravel update first

Model::where(['x' => 1, 'y' => 2])->first()->update([...]);