‘name‘ => ‘required|unique:posts|max:255‘, // posts 表名
源码 vendor\laravel\framework\src\Illuminate\Validation\Validator.php
eg
protected $sizeRules = [‘Size‘, ‘Between‘, ‘Min‘, ‘Max‘, ‘Gt‘, ‘Lt‘, ‘Gte‘, ‘Lte‘];
原文：https://www.cnblogs.com/cbugs/p/11246719.html