candy110 2014-08-19 14:17:26 6521次浏览 1条评论 5 2 0
$criteria = new CDbCriteria;  
//函数方式  
$criteria->addCondition("id=1"); //查询条件,即where id = 1    
$criteria->addInCondition('id', array(1,2,3,4,5)); //代表where id IN (1,23,,4,5,);    
$criteria->addNotInCondition('id', array(1,2,3,4,5));//与上面正好相法,是NOT IN    
$criteria->addCondition('id=1','OR');//这是OR条件,多个条件的时候,该条件是OR而非AND    
$criteria->addSearchCondition('name', '分类');//搜索条件,其实代表了。。where name like '%分%'    
$criteria->addBetweenCondition('id', 1, 4);//between 1 and 4
    
$criteria->compare('id', 1);  //这个方法比较特殊,他会根据你的参数自动处理成addCondition或者addInCondition, //即如果第二个参数是数组就会调用addInCondition    
   
$criteria->addCondition("id = :id");    
$criteria->params[':id']=1;    
 
//属性方式    
$criteria->select = 'id,parentid,name'; //代表了要查询的字段,默认select='*';    
$criteria->join = 'xxx'; //连接表    
$criteria->with = 'xxx'; //调用relations     
$criteria->limit = 10;    //取1条数据,如果小于0,则不作处理    
$criteria->offset = 1;   //两条合并起来,则表示 limit 10 offset 1,或者代表了。limit 1,10    
$criteria->order = 'xxx DESC,XXX ASC' ;//排序条件    
$criteria->group = 'group 条件';    
$criteria->having = 'having 条件 ';    
$criteria->distinct = FALSE; //是否唯一查询    

实例:

$criteria = new CDbCriteria();  
$criteria->select = 'table_name,model_id,sum(amount) total';  
$criteria->group = 'table_name,model_id';  
$criteria->addCondition("$nIdcId=4");//也可以$criteria->condition = "$nIdcId=4";  
$aResult = accessory_info::model()->findAll($criteria);  
  
$c = new CDbCriteria();  
$c->select = 't.id, t.created_at, t.outsource_id, t.user_id, t.operate, t.content';  
$c->join = 'LEFT JOIN outsource ON outsource.id=t.outsource_id';  
$c->condition = 'outsource.idc_id IN(' . implode(',', $idc_ids)  . ')';  
  
if($last_log_id) {  
    $c->condition .= " AND t.id > $last_log_id";  
}  
  
$c->limit = 20;  
$c->order = 't.id DESC';     
$logs = OutsourceProcessLog::model()->findAll($c);  

批注:
1,与DAO方式结果区别是:DAO方式 数组中的每一个元素仍是数组。而通过CDbCriteria方式,数组中的元素是对象。
2,即使该功能很强大,仍有一些需求不能满足,此时仍需sql语句。比如select avg(num) amount from ****
3,打印运行后的结果,可更深入yii这么做是如何实现的

//可见  
$c = new CDbCriteria();  
$c->join = "JOIN idc_user on t.id=idc_user.user_id";  
$c->condition = "idc_user.idc_id=$idc_id";  
  
//运行后  
object(CDbCriteria)#98 (12) { ["select"]=> string(1) "*" ["distinct"]=> bool(false) ["condition"]=> string(17) "idc_user.idc_id=6" ["params"]=> array(0) { } ["limit"]=> int(-1) ["offset"]=> int(-1) ["order"]=> string(0) "" ["group"]=> string(0) "" ["join"]=> string(38) "JOIN idc_user on t.id=idc_user.user_id" ["having"]=> string(0) "" ["with"]=> NULL ["alias"]=> NULL }   
  
//User::model()->with('Idcs')->findAll($c)  

二、mergeWith的情况

//在ActiveRecord中,增加条件限制  
$this->getDbCriteria()->mergeWith(array(  
    'condition'=>"idc_id IN ($ids)",  
)); 

转载地址:http://zccst.iteye.com/blog/1325003

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