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ErrorException: Undefined index: created_at
in /www/wwwroot/jimutu.cn/module/WenkuTopic/Api/Controller/WenkuTopicController.php:7Stack trace:
#0 /www/wwwroot/jimutu.cn/module/WenkuTopic/Api/Controller/WenkuTopicController.php(7): Illuminate\Foundation\Bootstrap\HandleExceptions->handleError(8, 'Undefined index...', '/www/wwwroot/ji...', 7, Array)
#1 /www/wwwroot/jimutu.cn/module/WenkuTopic/Web/Controller/WenkuTopicController.php(7): Module\WenkuTopic\Api\Controller\WenkuTopicController->get()
#2 [internal function]: Module\WenkuTopic\Web\Controller\WenkuTopicController->show('118')
#3 /www/wwwroot/jimutu.cn/vendor/laravel/framework/src/Illuminate/Routing/Controller.php(256): call_user_func_array(Array, Array)
#4 /www/wwwroot/jimutu.cn/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(164): Illuminate\Routing\Controller->callAction('show', Array)
#5 /www/wwwroot/jimutu.cn/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(112): Illuminate\Routing\ControllerDispatcher->call(Object(Module\WenkuTopic\Web\Controller\WenkuTopicController), Object(Illuminate\Routing\Route), 'show')
#6 [internal function]: Illuminate\Routing\ControllerDispatcher->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#7 /www/wwwroot/jimutu.cn/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(139): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#8 [internal function]: Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#9 /www/wwwroot/jimutu.cn/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(102): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#10 /www/wwwroot/jimutu.cn/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(114): Illuminate\Pipeline\Pipeline->then(Object(Closure))
请问是否是使用的旧的系统？可更新到最新试一下