这个错误的原因来自于没有安装一个依赖库: 官方文档说明如下: Modifying Columns Prerequisites Before modifying a column, be sure to add the doctrine/dbal dependency to your composer.json file. The Doctrine DBAL library is used to determine the current state of the column and creat…
跟具官方文档说:Laravel utilizes Composer to manage its dependencies. So, before using Laravel, you will need to make sure you have Composer installed on your machine. 参考文档:https://laravel.com/docs/5.0 按照文档说明执行,安装速度真是超级慢.我一度认为是安装出现了错误.下面是我安装的截图. 一共出现了三次信息提示.…