usage question: loading jobs from database about cron HOT 3 CLOSED

Schema::create('jobs', function (Blueprint $table) {
    $table->increments('id');
    $table->string('name');
    $table->string('expression');
    $table->string('function');
    $table->boolean('enabled');
});

public function boot() {
    \Event::listen('cron.collectJobs', function() {

        $jobs = App\Job::all();

        foreach ($jobs as $job) {
            \Cron::add($job->name, $job->expression, function() {
                eval($job->function)
            }, $job->enabled);
        }
    });
}

Schema::create('jobs', function (Blueprint $table) {
    $table->increments('id');
    $table->string('name');
    $table->string('expression');
    $table->boolean('enabled');
});

public function boot() {
    \Event::listen('cron.collectJobs', function() {

        $example1 = App\Job::where('name', 'example1')->firstOrFail();

        \Cron::add('example1', $example1->expression, function() {
                // Do some crazy things successfully
                return null;
            }, $job->enabled);
    });
}