cakephp是2个领域的独特？

Question

我有一个注册表,用户可以在其中填写两个电子邮件地址(email1和email2).市场营销的要求是它们必须是唯一的(如果我们有10个用户,那么就会有10*2 = 20个唯一的电子邮件地址).

该系统已经基于cakephp构建,所以我想知道的是,有什么类似于isUnique功能(在一个字段中是唯一的)可以直接执行此操作吗？或者我注定要自己编码？提前致谢.

编辑:建立在理查德的例子,这对我有用:

function checkUnique($data, $fields) {
    if (!is_array($fields)) {
        $fields = array($fields);
    }
    foreach($data as $key) {
        $checks = $key;
    }
    if (empty($checks)) {
      return true;  //allow null
    }
    foreach($fields as $key) {
        $tmp[$key] = $checks;
    }
    if (isset($this->data[$this->name][$this->primaryKey])) {
        $tmp[$this->primaryKey] = "<>".$this->data[$this->name][$this->primaryKey];
    }
    return $this->isUnique($tmp);
}

Answer 1

我在CakePHP Google Group上发布了一个解决方案:

http://groups.google.com/group/cake-php/browse_frm/thread/b3a1e4ae3eeb6091/e168f54bac27c163?lnk=gst&q=checkUnique#e168f54bac27c163

将以下内容添加到AppModel:

        /** 
         * checks is the field value is unqiue in the table 
         * note: we are overriding the default cakephp isUnique test as the 
original appears to be broken 
         * 
         * @param string $data Unused ($this->data is used instead) 
         * @param mnixed $fields field name (or array of field names) to 
validate 
         * @return boolean true if combination of fields is unique 
         */ 
        function checkUnique($data, $fields) { 
                if (!is_array($fields)) { 
                        $fields = array($fields); 
                } 
                foreach($fields as $key) { 
                        $tmp[$key] = $this->data[$this->name][$key]; 
                } 
                if (isset($this->data[$this->name][$this->primaryKey])) { 
                        $tmp[$this->primaryKey] = "<>".$this->data[$this->name][$this- 
>primaryKey]; 

                } 
                return $this->isUnique($tmp, false); 
        } 
} 

并在您的模型验证中使用:

        var $validate = array( 
                "name"=>array( 
                        "unique"=>array( 
                                "rule"=>array("checkUnique", array("name", "institution_id")), 
                                "message"=>"A contact with that name already exists for that 
institution" 
                        ) 
                ) 
       ); 

Answer 2

checkUnique可以只写为包装isUnique.

class AppModel extends Model {
    public function checkUnique($ignoredData, $fields, $or = true) {
        return $this->isUnique($fields, $or);
    }
}

并在您的模型验证中使用:

public $validate = array(
    'name' => array(
        'unique' => array(
            'rule' => array('checkUnique', array('name', 'institution_id'), false), 
            'message' => 'A contact with that name already exists for that 
institution'
        )
    )
);