yiiADU

<span style="font-size:14px;">一、//1.该方法是根据一个条件查询一个集合$admin=Admin::model()->findAll($condition,$params);$admin=Admin::model()->findAll("username=:name",array(":name"=>$username)); //2. findAllByPk(该方法是根据主键查询一个集合,可以使用多个主键)$admin=Admin::model()->findAllByPk($postIDs,$condition,$params);$admin=Admin::model()->findAllByPk($id,"name like :name and age=:age",array(':name'=>$name,'age'=>$age));$admin=Admin::model()->findAllByPk(array(1,2)); //3.findAllByAttributes (该方法是根据条件查询一个集合,可以是多个条件,把条件放到数组里面)$admin=Admin::model()->findAllByAttributes($attributes,$condition,$params);$admin=Admin::model()->findAllByAttributes(array('username'=>'admin')); //4.findAllBySql (该方法是根据SQL语句查询一个数组)$admin=Admin::model()->findAllBySql($sql,$params);$admin=Admin::model()->findAllBySql("select * from admin where username like :name",array(':name'=>'?%'));二、查询对象的方法//根据主键查询出一个对象,如：findByPk(1);$admin=Admin::model()->findByPk($postID,$condition,$params);$admin=Admin::model()->findByPk(1); //根据一个条件查询出一组数据,可能是多个,但是他只返回第一行数据$row=Admin::model()->find($condition,$params);$row=Admin::model()->find('username=:name',array(':name'=>'admin')); //该方法是根据条件查询一组数据,可以是多个条件,把条件放到数组里面,查询的也是第一条数据$admin=Admin::model()->findByAttributes($attributes,$condition,$params);$admin=Admin::model()->findByAttributes(array('username'=>'admin')); //该方法是根据SQL语句查询一组数据,他查询的也是第一条数据$admin=Admin::model()->findBySql($sql,$params);$admin=Admin::model()->findBySql("select * from admin where username=:name",array(':name'=>'admin')); //拼一个获得SQL的方法,在根据find查询出一个对象 $criteria=new CDbCriteria; $criteria->select='username'; // only select the 'title' column $criteria->condition='username=:username';$criteria->params=array(":username=>'admin'");$criteria->order = "id DESC";$criteria->limit = "3";$post=Post::model()->find($criteria); // $params isnot needed 三、查询个数,判断查询是否有结果//该方法是根据一个条件查询一个集合有多少条记录,返回一个int型数字$n=Post::model()->count($condition,$params);$n=Post::model()->count("username=:name",array(":name"=>$username)); //该方法是根据SQL语句查询一个集合有多少条记录,返回一个int型数字$n=Post::model()->countBySql($sql,$params);$n=Post::model()->countBySql("select * from admin where username=:name",array(':name'=>'admin')); //该方法是根据一个条件查询查询得到的数组有没有数据,如果有数据返回一个true,否则没有找到$exists=Post::model()->exists($condition,$params);$exists=Post::model()->exists("name=:name",array(":name"=>$username));四、添加的方法$admin = new Admin;       $admin->username = $username;$admin->password = $password;if($admin->save() > 0){ echo "添加成功"; }else{ echo "添加失败"; }五、修改的方法Post::model()->updateAll($attributes,$condition,$params);$count =Admin::model()->updateAll(array('username'=>'11111','password'=>'11111'),'password=:pass',array(':pass'=>'1111a1'));if($count > 0){ echo "修改成功"; }else{ echo "修改失败"; } //$pk主键,可以是一个也可以是一个集合,$attributes是要修改的字段的集合,$condition条件,$params传入的值Post::model()->updateByPk($pk,$attributes,$condition,$params);$count =Admin::model()->updateByPk(1,array('username'=>'admin','password'=>'admin'));$count =Admin::model()->updateByPk(array(1,2),array('username'=>'admin','password'=>'admin'),'username=:name',array(':name'=>'admin'));if($count>0){ echo "修改成功"; }else{ echo "修改失败"; } Post::model()->updateCounters($counters,$condition,$params);$count=Admin::model()->updateCounters(array('status'=>1),'username=:name',array(':name'=>'admin'));if($count > 0){ echo "修改成功"; }else{ echo "修改失败"; }//array('status'=>1)代表数据库中的admin表根据条件username='admin',查询出的所有结果status字段都自加1六、删除的方法//deleteAllPost::model()->deleteAll($condition,$params);   $count = Admin::model()->deleteAll('username=:name and password=:pass',array(':name'=>'admin',':pass'=>'admin'));$count = Admin::model()->deleteAll('id in("1,2,3")');//删除id为这些的数据if($count>0){echo "删除成功"; }else{ echo "删除失败"; } //deleteByPkPost::model()->deleteByPk($pk,$condition,$params);$count = Admin::model()->deleteByPk(1);$count =Admin::model()->deleteByPk(array(1,2),'username=:name',array(':name'=>'admin'));if($count>0){ echo "删除成功"; }else{ echo "删除失败"; }七、更多方法//createCommand(执行原生的SQL语句)$sql = "SELECT u.account,i.* FROM sys_user as u left join user_info as i on u.id=i.user_id";$rows=Yii::app()->db->createCommand($sql)->query();foreach ($rows as $k => $v){    echo $v['add_time'];} //事务的基本结构(多表更新插入操作请使用事务处理)$dbTrans = Yii::app()->db->beginTransaction();try{    $post = new Post;    $post->'title' = 'Hello dodobook!!!';    if(!$post->save()) throw new Exception("Error Processing Request", 1);    $dbTrans->commit();//  $this->_end(0,'添加成功!!!');}catch(Exception $e){    $dbTrans->rollback();//  $this->_end($e->getCode(),$e->getMessage());}</span>