laravel执行php artisan migrate报错

报错一

$ php artisan migrate

   Illuminate\Database\QueryException  : could not find driver (SQL: select * fr
om information_schema.tables where table_schema = dev_oms and table_name = migra
tions)

  at D:\WWW\dev_oms\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 th
is exception a
    662|         // lot more helpful to the developer instead of just the databa
se'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")
      D:\WWW\dev_oms\vendor\laravel\framework\src\Illuminate\Database\Connectors
\Connector.php:68

  2   PDO::__construct("mysql:host=127.0.0.1;port=3306;dbname=dev_oms", "root",
"root", [])
      D:\WWW\dev_oms\vendor\laravel\framework\src\Illuminate\Database\Connectors
\Connector.php:68

  Please use the argument -v to see more details.

原因是php.ini 扩展"php_pdo_mysql.dll"没开启

报错二

$ php artisan migrate
Migration table created successfully.

   Illuminate\Database\QueryException  : SQLSTATE[42000]: Syntax error or access
 violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: a
lter table `users` add unique `users_email_unique`(`email`))

  at D:\WWW\dev_oms\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 th
is exception a
    662|         // lot more helpful to the developer instead of just the databa
se's errors.
    663|         catch (Exception $e) {
  > 664|             throw new QueryException(
    665|                 $query, $this->prepareBindings($bindings), $e
    666|             );
    667|         }
    668|

  Exception trace:

  1   PDOException::("SQLSTATE[42000]: Syntax error or access violation: 1071 Sp
ecified key was too long; max key length is 767 bytes")
      D:\WWW\dev_oms\vendor\laravel\framework\src\Illuminate\Database\Connection
.php:458

  2   PDOStatement::execute()
      D:\WWW\dev_oms\vendor\laravel\framework\src\Illuminate\Database\Connection
.php:458

  Please use the argument -v to see more details.

数据库编码改为utf8mb4

报错三

$ php artisan migrate
Migration table created successfully.

   Illuminate\Database\QueryException  : SQLSTATE[42000]: Syntax error or access
 violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: a
lter table `users` add unique `users_email_unique`(`email`))

  at D:\WWW\dev_oms\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 th
is exception a
    662|         // lot more helpful to the developer instead of just the databa
se's errors.
    663|         catch (Exception $e) {
  > 664|             throw new QueryException(
    665|                 $query, $this->prepareBindings($bindings), $e
    666|             );
    667|         }
    668|

  Exception trace:

  1   PDOException::("SQLSTATE[42000]: Syntax error or access violation: 1071 Sp
ecified key was too long; max key length is 767 bytes")
      D:\WWW\dev_oms\vendor\laravel\framework\src\Illuminate\Database\Connection
.php:458

  2   PDOStatement::execute()
      D:\WWW\dev_oms\vendor\laravel\framework\src\Illuminate\Database\Connection
.php:458

  Please use the argument -v to see more details.

加上两行代码即可