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(1/1) ErrorException

Trying to get property 'grade_id' of non-object

in ArticleController.php (line 64)
at HandleExceptions->handleError(8, 'Trying to get property \'grade_id\' of non-object', '/home/admin/domains/roshangar.sch.ir/public_html/local/app/Http/Controllers/ArticleController.php', 64, array('id' => '%D9%BE%DB%8C%D8%B4-%D8%AB%D8%A8%D8%AA-%D9%86%D8%A7%D9%85-%D9%85%DB%8C%D8%A7%D9%86-%D9%BE%D8%A7%DB%8C%D9%87', 'theme' => object(stdClass), 'slug' => '%D9%BE%DB%8C%D8%B4-%D8%AB%D8%A8%D8%AA-%D9%86%D8%A7%D9%85-%D9%85%DB%8C%D8%A7%D9%86-%D9%BE%D8%A7%DB%8C%D9%87', 'article' => null))in ArticleController.php (line 64)
at ArticleController->show('%D9%BE%DB%8C%D8%B4-%D8%AB%D8%A8%D8%AA-%D9%86%D8%A7%D9%85-%D9%85%DB%8C%D8%A7%D9%86-%D9%BE%D8%A7%DB%8C%D9%87')
at call_user_func_array(array(object(ArticleController), 'show'), array('id' => '%D9%BE%DB%8C%D8%B4-%D8%AB%D8%A8%D8%AA-%D9%86%D8%A7%D9%85-%D9%85%DB%8C%D8%A7%D9%86-%D9%BE%D8%A7%DB%8C%D9%87'))in Controller.php (line 55)
at Controller->callAction('show', array('id' => '%D9%BE%DB%8C%D8%B4-%D8%AB%D8%A8%D8%AA-%D9%86%D8%A7%D9%85-%D9%85%DB%8C%D8%A7%D9%86-%D9%BE%D8%A7%DB%8C%D9%87'))in ControllerDispatcher.php (line 44)
at ControllerDispatcher->dispatch(object(Route), object(ArticleController), 'show')in Route.php (line 203)
at Route->runController()in Route.php (line 160)
at Route->run()in Router.php (line 572)
at Router->Illuminate\Routing\{closure}(object(Request))in Pipeline.php (line 30)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in ShowUnderPage.php (line 23)
at ShowUnderPage->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in BlockIfExpired.php (line 24)
at BlockIfExpired->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in BlockIfNoAuth.php (line 22)
at BlockIfNoAuth->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in SubstituteBindings.php (line 41)
at SubstituteBindings->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in VerifyCsrfToken.php (line 65)
at VerifyCsrfToken->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in ShareErrorsFromSession.php (line 49)
at ShareErrorsFromSession->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in StartSession.php (line 64)
at StartSession->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in AddQueuedCookiesToResponse.php (line 37)
at AddQueuedCookiesToResponse->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in EncryptCookies.php (line 59)
at EncryptCookies->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in Pipeline.php (line 102)
at Pipeline->then(object(Closure))in Router.php (line 574)
at Router->runRouteWithinStack(object(Route), object(Request))in Router.php (line 533)
at Router->dispatchToRoute(object(Request))in Router.php (line 511)
at Router->dispatch(object(Request))in Kernel.php (line 176)
at Kernel->Illuminate\Foundation\Http\{closure}(object(Request))in Pipeline.php (line 30)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in TransformsRequest.php (line 30)
at TransformsRequest->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in TransformsRequest.php (line 30)
at TransformsRequest->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in ValidatePostSize.php (line 27)
at ValidatePostSize->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in CheckForMaintenanceMode.php (line 46)
at CheckForMaintenanceMode->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in Pipeline.php (line 102)
at Pipeline->then(object(Closure))in Kernel.php (line 151)
at Kernel->sendRequestThroughRouter(object(Request))in Kernel.php (line 116)
at Kernel->handle(object(Request))in index.php (line 53)