1：mysql5.7需要sql_mode的值为：STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

2：修改config/databases.php中mysql的strict

'mysql' => [    'driver' => 'mysql',    'host' => env('DB_HOST', ''),    'port' => env('DB_PORT', ''),    'database' => env('DB_DATABASE', ''),    'username' => env('DB_USERNAME', ''),    'password' => env('DB_PASSWORD', ''),    'unix_socket' => env('DB_SOCKET', ''),    'charset' => 'utf8mb4',    'collation' => 'utf8mb4_unicode_ci',    'prefix' => env('DB_PREFIX','user_'),    'strict' => false,    'engine' => null,],