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HomeBackend DevelopmentPHP Tutorialyii2中自定义验证守则rules

yii2中自定义验证规则rules

作者:白狼 出处:www.manks.top/article/yii2_custom_rules 

本文版权归作者,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。

yii2的一个强大之处之一就是他的Form组件,既方便又安全。有些小伙伴感觉用yii一段时间了,好嘛,除了比tp"难懂"好像啥都没有。

领导安排搞一个注册的功能,这家伙刷刷刷的又是百度啥啥啥好的表单样式,又是百度啥啥啥validate验证,真替这家伙捏把汗。

当然啦,废话说在前头,咱们的重点喃,是要利用ActiveForm,然后怎么去实现自定义验证规则。

先来说说场景:

条件:①、有两个字段分别是A和B ②、A有两个值分别是1和2

需求是:当用户选择的A的值等于1的时候,B的值必须填写,当A的值等于2的时候,B的值不写也没关系。其中A必选。

我们来看看用Yii2自带的rules怎么去实现

首先在其关联model上加上下面这句规则

   /**     * @inheritdoc     */    public function rules()    {        return [            [['B'], 'requiredByASpecial'],        ];    }

然后在该model里面去实现requiredByASpecial方法即可

   /**     *  自定义验证B     */    public function requiredByASpecial($attribute, $params)    {        if ($this->A== 1)         {            if ($this->B=== '')                $this->addError($attribute, "B的值不可以为空.");        }    }

上面的意思就是说当A等于1且B的值为空时,返回错误信息"B的值不可以为空"。

以上只是举了一个简单的例子,可以根据具体需求应用。

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