Schema::create('department', function (Blueprint $table) {
        $table->increments('id');
        $table->string('name')->comment('اسم الأدارة');
        $table->integer('dep_parent')->unsigned()->comment('الأدارة الرئيسية');
        $table->timestamps();
    });
    DB::statement("ALTER TABLE department COMMENT 'جدول الادارات'");
    DB::statement("ALTER TABLE department ADD FOREIGN KEY (dep_parent) REFERENCES department(id)");