Laravel错误 - 类stdClass的的对象无法转换为字符串

Question

这是我运行的代码：

//FIXME 
    $data = $request->all(); 
    $randomPassage = DB::table('passages')->inRandomOrder()->first(); 
    session()->put('passage', $randomPassage); 
    echo($randomPassage); 

这是错误的堆栈跟踪：

in routes.php line 31 
at HandleExceptions->handleError('4096', 'Object of class stdClass could not be converted to string', 'C:\xampp\htdocs\spring2017-cp-443965-441701\dev-develop\app\Http\routes.php', '31', array('request' => object(Request), 'data' => array('_token' => 'POr6dhVLdDza0O0jHLbWy9daKr3nkyA94EIm4wHM'), 'randomPassage' => object(stdClass))) in routes.php line 31 
at RouteServiceProvider->{closure}(object(Request)) 
at call_user_func_array(object(Closure), array(object(Request))) in compiled.php line 8519 
at Route->runCallable(object(Request)) in compiled.php line 8509 
at Route->run(object(Request)) in compiled.php line 8225 
at Router->Illuminate\Routing\{closure}(object(Request)) 
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 52 
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in compiled.php line 3225 
at VerifyCsrfToken->handle(object(Request), object(Closure)) 
at call_user_func_array(array(object(VerifyCsrfToken), 'handle'), array(object(Request), object(Closure))) in compiled.php line 9963 
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) 
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 32 
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in compiled.php line 13474 
at ShareErrorsFromSession->handle(object(Request), object(Closure)) 
at call_user_func_array(array(object(ShareErrorsFromSession), 'handle'), array(object(Request), object(Closure))) in compiled.php line 9963 
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) 
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 32 
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in compiled.php line 11964 
at StartSession->handle(object(Request), object(Closure)) 
at call_user_func_array(array(object(StartSession), 'handle'), array(object(Request), object(Closure))) in compiled.php line 9963 
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) 
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 32 
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in compiled.php line 13213 
at AddQueuedCookiesToResponse->handle(object(Request), object(Closure)) 
at call_user_func_array(array(object(AddQueuedCookiesToResponse), 'handle'), array(object(Request), object(Closure))) in compiled.php line 9963 
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) 
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 32 
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in compiled.php line 13150 
at EncryptCookies->handle(object(Request), object(Closure)) 
at call_user_func_array(array(object(EncryptCookies), 'handle'), array(object(Request), object(Closure))) in compiled.php line 9963 
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) 
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 32 
at Pipeline->Illuminate\Routing\{closure}(object(Request)) 
at call_user_func(object(Closure), object(Request)) in compiled.php line 9948 
at Pipeline->then(object(Closure)) in compiled.php line 8226 
at Router->runRouteWithinStack(object(Route), object(Request)) in compiled.php line 8217 
at Router->dispatchToRoute(object(Request)) in compiled.php line 8207 
at Router->dispatch(object(Request)) in compiled.php line 2419 
at Kernel->Illuminate\Foundation\Http\{closure}(object(Request)) 
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 52 
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in compiled.php line 3286 
at CheckForMaintenanceMode->handle(object(Request), object(Closure)) 
at call_user_func_array(array(object(CheckForMaintenanceMode), 'handle'), array(object(Request), object(Closure))) in compiled.php line 9963 
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) 
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 32 
at Pipeline->Illuminate\Routing\{closure}(object(Request)) 
at call_user_func(object(Closure), object(Request)) in compiled.php line 9948 
at Pipeline->then(object(Closure)) in compiled.php line 2366 
at Kernel->sendRequestThroughRouter(object(Request)) in compiled.php line 2350 
at Kernel->handle(object(Request)) in index.php line 54 
at require_once('C:\xampp\htdocs\spring2017-cp-443965-441701\dev-develop\public\index.php') in server.php line 21 

我只是想从数据库打印值。我知道我正在尝试打印一个对象，但我想把它当作一个字符串。问题是，如何将数据作为字符串获取，以便我可以回显它。感谢所有的帮助！

杰克

更新：当我的var_dump，我得到：

object(stdClass)#176 (2) { ["passageName"]=> string(10) "Developers" ["content"]=> string(26) "Jack, Gen" } 

Answer 1

呼应只是对象的部分之一：

echo $randomPassage->content;