问题：
Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes
解决：
laravel项目查找这个文件 AppServiceProvider.php
目录：
app/Providers/AppServiceProvider.php
修改方法：
use IlluminateSupportFacadesSchema; //Import Schema
function boot()
{
Schema::defaultStringLength(191); //Solved by increasing StringLength
}
