如何修复“PDOException和PDO：：__construct”迁移的Laravel错误

Question

我正在尝试执行php artisan migrate命令以在phpmyadmin中创建一个表

但它的显示误差

“找不到司机”

我做了php artisan serve，它成功了

 'mysql' => [
                'driver' => 'mysql',
                'host' => env('DB_HOST', '127.0.0.1'),
                'port' => env('DB_PORT', '3306'),
                'database' => env('DB_DATABASE', 'testdb'),
                'username' => env('DB_USERNAME', 'root'),
                'password' => env('DB_PASSWORD', 'xxxx'),
                'unix_socket' => env('DB_SOCKET', ''),
                'charset' => 'utf8mb4',
                'collation' => 'utf8mb4_unicode_ci',
                'prefix' => '',
                'prefix_indexes' => true,
                'strict' => true,
                'engine' => null,
                'options' => extension_loaded('pdo_mysql') ? array_filter([
                PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
            ]) : [],
        ],

​

 DB_CONNECTION=mysql
 DB_HOST=127.0.0.1
 DB_PORT=3306
 DB_DATABASE=testdb
 DB_USERNAME=root
 DB_PASSWORD=xxxx

--这是命令行中显示的错误：

 Illuminate\Database\QueryException  : could not find driver 
   (SQL: select * from information_schema.tables where table_schema = 
    testdb and table_name = migrations)

  at C:\AppServ\www\laravel2\vendor\laravel\framework\src\Illuminate\Database\Connection.php:664
    660|         // If an exception occurs when attempting to run a query, we'll format the error
    661|         // message to include the bindings with SQL, which will make this exception a
    662|         // lot more helpful to the developer instead of just the database's errors.
    663|         catch (Exception $e) {
  > 664|             throw new QueryException(
    665|                 $query, $this->prepareBindings($bindings), $e
    666|             );
    667|         }
    668|

  Exception trace:

  1   PDOException::("could not find driver")
      C:\AppServ\www\laravel2\vendor\laravel\framework\src\Illuminate\Database\Connectors\Connector.php:70

  2   PDO::__construct("mysql:host=127.0.0.1;port=3306;dbname=testdb", "root", "xxxx", [])
      C:\AppServ\www\laravel2\vendor\laravel\framework\src\Illuminate\Database\Connectors\Connector.php:70

它将显示“成功创建的表”，并在phpmyadmin中创建

Answer 1

确保mysql在您的计算机上运行，如果您使用的国产mysql端口可能是33060。

要明确mysql是否正在运行，请在mac或linux上打开终端或windows上的命令行，如果遇到错误，则编写mysql -u root，这意味着mysql没有运行。

Answer 2

您缺少php-mysql驱动程序，如果缺少它，可以通过执行php -i | grep mysql来检查它，考虑到您的系统类型，您必须安装它，例如，如果您在ubuntu上运行php7.2系统，您应该这样做：sudo apt-get install php7.2-mysql。

Answer 3

根据此更改config/database.php文件：

'mysql' => [
            'driver' => 'mysql',
            'host' => env('DB_HOST', '127.0.0.1'),
            'port' => env('DB_PORT', '3306'),
            'database' => env('DB_DATABASE', 'forge'),
            'username' => env('DB_USERNAME', 'forge'),
            'password' => env('DB_PASSWORD', ''),
            'unix_socket' => env('DB_SOCKET', ''),
            'charset' => 'utf8mb4',
            'collation' => 'utf8mb4_unicode_ci',
            'prefix' => '',
            'prefix_indexes' => true,
            'strict' => true,
            'engine' => null,
            'options' => extension_loaded('pdo_mysql') ? array_filter([
                PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
            ]) : [],
        ],

检查这里：链接

打开.env文件并编辑它。只需设置正确的数据库凭据即可

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=            // Your Database Name
DB_USERNAME=           // Your Database Username
DB_PASSWORD=          // Your Database Password, If no password is set then just clear it

在.env编辑之后，必须清除缓存：php artisan config:cache