CakePHP: 一些验证笔记

CakePHP 2.x CookBook 中文版 第七章 模型 之 数据校验 [url]http://www.cnblogs.com/matchless/archive/2013/02/20/2918541.html[/url]
一些规则关键字：
'rule' => 'alphaNumeric',
'rule' => 'email',
'rule' => 'date',
'rule' => array('between', 5, 15),
'rule' => array('minLength', '8'),
'rule' => array('maxLength', '8'),


'required' => true,
'allowEmpty' => true
一个例子：

class User extends AppModel {
    public $validate = array(
        'login' => array(
            'alphaNumeric' => array(
                'rule'     => 'alphaNumeric',
                'required' => true,
                'message'  => 'Alphabets and numbers only'
            ),
            'between' => array(
                'rule'    => array('between', 5, 15),
                'message' => 'Between 5 to 15 characters'
            )
        ),
        'password' => array(
            'rule'    => array('minLength', '8'),
            'message' => 'Minimum 8 characters long'
        ),
        'email' => 'email',
        'born' => array(
            'rule'       => 'date',
            'message'    => 'Enter a valid date',
            'allowEmpty' => true
        )
    );
}

1.简单的验证：

class User extends AppModel {
    public $validate = array(
        'login' => 'alphaNumeric',
        'email' => 'email',
        'born'  => 'date'
    );
}

2.一个字段的多个验证规则

    public $validate = array(
        'enp_name' => array(
            "minLength"=>array(
                "rule"=>array("minLength",1),
                "message"=>"至少输入一个文字"
            ),
            "maxLength"=>array(
                "rule"=>array("maxLength",3),
                "message"=>"名称的个数不能大于3个"
            )
        )
    );

3.单个规则：每个列一个规则

public $validate = array(
    'fieldName1' => array(
        'rule'       => 'ruleName', // or: array('ruleName', 'param1', 'param2' ...)
        'required'   => true,
        'allowEmpty' => false,
        'on'         => 'create', // or: 'update'
        'message'    => 'Your Error Message'
    )
);

4.多个规则

public $validate = array(
    'fieldName' => array(
        'ruleName' => array(
            'rule' => 'ruleName',
            // 类似 on，required 等扩展键放在这里...
        ),
        'ruleName2' => array(
            'rule' => 'ruleName2',
            // 类似 on，required 等扩展键放在这里...
        )
    )
);

5.自定义校验规则
A:自定义校验正则表达式

public $validate = array(
     'login' => array(
         'rule'    => '/^[a-z0-9]{3,}$/i',
         'message' => 'Only letters and integers, min 3 characters'
     )
 );

B:添加自己的校验方法

class User extends AppModel {

    public $validate = array(
        'promotion_code' => array(
            'rule'    => array('limitDuplicates', 25),
            'message' => 'This code has been used too many times.'
        )
    );

    public function limitDuplicates($check, $limit) {
        // $check 的值： array('promotion_code' => 'some-value')
        // $limit 的值： 25
        $existing_promo_count = $this->find('count', array(
            'conditions' => $check,
            'recursive' => -1
        ));
        return $existing_promo_count < $limit;
    }
}

6.动态改变校验规则
A:添加新的校验规则

$this->validator()->add('password', 'required', array(
     'rule' => 'notEmpty',
     'required' => 'create'
 ));

B:链式多次调用 add 来创建多条所需的规则

// 在模型类中
$this->validator()
    ->add('password', 'required', array(
        'rule' => 'notEmpty',
        'required' => 'create'
    ))
    ->add('password', 'size', array(
        'rule' => array('between', 8, 20),
        'message' => 'Password should be at least 8 chars long'
    ));

C:一次性为单个列添加多条规则

$this->validator()->add('password', array(
    'required' => array(
        'rule' => 'notEmpty',
        'required' => 'create'
    ),
    'size' => array(
        'rule' => array('between', 8, 20),
        'message' => 'Password should be at least 8 chars long'
    )
));