Laravel 新手，大概使用 Laravel 不到 3 个月，也只是写了两个项目。使用过程之中，我发现 Laravel 的报错提示真的很奇葩。

＃报错 1

ERROR Report ：
Whoops, looks like something went wrong.
1/1UnexpectedValueException
in Response.php line 399:The Response content must > be a string or object implementing __toString(), > "boolean" given. in Response.php line 399

Route.php
Route::post('lamp/test', 'Lamp\LampController@img');

Controller
Controller 里面就有 img 方法且是私有的，也有 test 方法。错误的地方是，在 routes.php 文件中，指定路由 “lamp/test” 对应的方法是 img。最终导致上面的错误。

＃报错 2

ERROR Report:
2/2ReflectionException
in Route.php line 280:Class App\Http\Controllers\User\CustomerController does > not exist in Route.php line 280 at ReflectionMethod
->__construct('App\Http\Controllers\User\CustomerController', 'edit') >in Route.php line 280 ....

Conclution: controller 中的代码语法又问题，如下：

 $customer->salesmanName = $salesman->name ? $salesman->name ? $salesman->tel;

＃报错 3

BadMethodCallException
in RedirectResponse.php line 211:Method [back] does not exist on Redirect.

Route.php

Route::get('back', 'BackController@index');

报错原因：

App\Http\Controllers 目录下，并没有 BackController。因为我创建 BackController 时，将文件错误地命名为 backController.php 了。

＃报错 4

QueryException
in Connection.php line 769:SQLSTATE[HY000]: General error: 1364 Field 'type'
doesn't have a default value (SQL: insert into t_type (updated_at, created_at)
values (2016-11-08 08:19:04, 2016-11-08 08:19:04))

\App\Type.php

namespace App;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Notifications\Notifiable;use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Database\Eloquent\SoftDeletes;
class Type extends Authenticatable {    
    //    use Notifiable, SoftDeletes;    
    protected $fillable = ['name']; // *报错引发的原因就是这里*
    protected $table = 't_type';    
    protected $dates = ['deleted_at'];
}

报错原因：如上代码注释。

#报错 4

QueryException
in Connection.php line 729:SQLSTATE[42S22]: Column not found: 1054 Unknown column 'productId' in 'where clause' (SQL: delete from lamp_cart_detail where (cartId = 99 and productId = 37))

#报错 5

[Tue Mar 14 11:37:27 2017] [error] [client 119.136.115.138] PHP Fatal error:  Uncaught exception 
'Unexpected Value Exception' with message '. 
The stream or file  could not be opened: failed to open stream: 
Permission denied' in 
107\nStack trace:\n
 
Monolog\\Handler\\StreamHandler->write(Array)\n
#1  Monolog\\Handler\\AbstractProcessingHandler->handle(Array)\n
#2  
Monolog\\Logger->addRecord(400, Object(UnexpectedValueException), Array)\n
#3 
 Monolog\\Logger->error(Object(UnexpectedValueException), Array)\n
#4 
 Illuminate\\Log\\Writer->writeLog('error', Object(Unexpected  on line 107
[Tue Mar 14 11:37:27 2017] [error] [client 119.136.115.138] PHP Fatal error: 
 Uncaught exception 'Unexpected Value Exception' with message 'The stream or file  could not be opened: failed to open stream: Permission denied' in 

Stack trace:\n#0                                                                                                                              tractProcessingHandler.php(37): Monolog\\Handler\\StreamHandler->write(Array)\n
#1  Monolog\\Handler\\AbstractProcessingHandler->handle(Array)\n
#2  Monolog\\Logger->addRecord(400, Object(Symfony\\Component\\Debug\\Exception\\FatalErrorException), Array)\n
#3  Monolog\\Logger->error(Object(Symfony\\Component\\Debug\\Exception\\FatalErrorException), Array)\n
#4   in  on line 107