Yii中validator之safe用法
Yii中validator之safe用法
在开始使用yii的时候，一直对校验规则中的safe不是很理解，今天测试了一下，算是搞清楚了safe的内涵。一直以为safe就是框架会对输入的内容进行过滤，比如sql注入之类的filter，其实并不是的，safe or unsafe的不同主要是在于$model->attributes=$_POST['User']; 这种赋值的方式在yii中叫批量复制(Massive Assignment),当model中全部的属性都是safe的时候，表单提交的$_POST['User']的值可以全部赋给$model->attributes，然后再save进入数据库。但是一旦有一个属性没有设置为safe，比如username,当修改了用户名后提交，你会发现用户名的值是没有更新到的，因为username是unsafe的，所以Massive Assignment中无法把新的username的值赋给model。
下面是大师的解释：
safe attributes指的是由用户输入的、需要验证的属性。如果一个属性出现在一个验证规则里，并且该验证规则的适用scenario和model当前的scenario一致，那么该属性就是safe的，可以接受批量赋值。在yii 1.1里，safeAttributes()函数已经取消了。所有的属性都通过验证规则来声明是否safe。
具体可以参看：http://www.yiiframework.com/wiki/161/understanding-safe-validation-rules/
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