当我尝试使用faker在laravel5.4中播种我的数据库时出现错误useIlluminate\Database\Seeder;useapp\PostModell;classpostcarseederextendsSeeder{/***Runthedatabaseseeds.**@returnvoid*/publicfunctionrun(){//Let'struncateourexistingrecordstostartfromscratch.PostModell::truncate();$faker=\Faker\Factory::create();//Andnow,let'sc