Yii 1.0数据库操作 查询、增加、更新、删除（事务处理）

http://blog.sina.com.cn/s/blog_66ac09390102vkpd.html

1、根据条件查询一个集合

$objectResult=Post::model()->findAll($condition,$params);
$objectResult=Post::model()->findAll("username=:name",array(":name"=>$username));
$objectResult=RepairItem::model()->findAll("orderno=:orderno and orderpostid=:orderpostid",array(":orderno"=>$orderInfo["orderno"],":orderpostid"=>$orderInfo["orderpostid"]));

$infoArr = NewsList::model()->findAll("status = "1" ORDER BY postid DESC limit 10 ");
 

2、根据主键查询一个集合,可以使用多个主键 findAllByPk

$objectResult=Post::model()->findAllByPk($postIDs,$condition,$params);
$objectResult=Post::model()->findAllByPk($postid,"name like :name and age=:age",array(":name"=>$name,"age"=>$age));
$objectResult=Post::model()->findAllByPk(array(1,2));
 

3、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 findAllByAttributes

$objectResult=Post::model()->findAllByAttributes($attributes,$condition,$params);
$objectResult=Post::model()->findAllByAttributes(array("username"=>"jack"));
 

4、根据SQL语句查询一个数组 findAllBySql

$arrResult=Post::model()->findAllBySql($sql,$params);
$arrResult=Post::model()->findAllBySql("select * from tbl_post where username like :name",array(":name"=>"?%"));

5、根据主键查询出一个对象 eg：findByPk(1);

$arrResult=Post::model()->findByPk($postID,$condition,$params);
$arrResult=Post::model()->findByPk(1);

6、根据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】

$arrRow=Post::model()->find($condition,$params);
$arrRow=Post::model()->find("username=:name",array(":name"=>"jack"));

7、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】

$objectResult=Post::model()->findByAttributes($attributes,$condition,$params);
$objectResult=Post::model()->findByAttributes(array("username"=>"objectResult"));
 

8、根据SQL语句查询一组数据,【查询的也是第一条数据】

$objectResult=Post::model()->findBySql($sql,$params);
$objectResult=Post::model()->findBySql("select * from objectResult where username=:name",array(":name"=>"objectResult"));
 

9、通过CDbCriteria类find查询出一个对象

$criteria=new CDbCriteria;
$criteria->select="username"; // 限制显示哪些字段
$criteria->condition="username=:username";     //一个查询条件用aCondition.多条件用addCondition
$criteria->params=array(":username=>"jack"");
$criteria->order = "postsort DESC";
$criteria->limit = "3";
$post=Post::model()->find($criteria);
 

10、多条件查询的语句

$criteria = new CDbCriteria;     
$criteria->addCondition("postid=1"); //等同于 where postid = 1
$criteria->addInCondition("postid", array(1,2,3,4,5)); //等同于 where postid IN (1,2,3,4,5,);
$criteria->addNotInCondition("postid", array(1,2,3,4,5));//等同于 NOT IN (1,2,3,4,5,)
$criteria->addCondition("postid=1","OR");//等同于 OR而非AND
$criteria->addSearchCondition("username", "jack");//等同于 where name like "%jack%"
$criteria->addBetweenCondition("postid", 1, 4);// 等同于 between 1 and 4
$criteria->compare("postid", 1);    //根据你的参数自动处理成addCondition或者addInCondition.
$criteria->compare("postid", array(1,2,3));   //数组就会调用addInCondition
 
 
$criteria->select = "postid,parentid,name"; //限制显示哪些字段
$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

三、查询个数,判断查询是否有结果


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
$intCount=Post::model()->count($condition,$params);
$intCount=Post::model()->count("username=:name",array(":name"=>$username));
 
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
$intCount=Post::model()->countBySql($sql,$params);
$intCount=Post::model()->countBySql("select * from objectResult where username=:name",array(":name"=>"objectResult"));
 
根据一个条件查询查询得到的数组有没有数据,有数据返回一个true,否则没有找到
$boolExists=Post::model()->exists($condition,$params);
$boolExist=Post::model()->exists("name=:name",array(":name"=>$username));

四、添加的方法

$objectPost = new Post;       
$objectPost->username = $username;
$objectPost->password = $password;
或许
$objectPost->attributes = $arrNewData;

if($objectPost->save()){
    $intPostId= $objectPost->primaryKey; //生成主键id
    echo "添加成功";
}else{
    echo "添加失败";
}

五、修改的方法


Post::model()->updateAll($attributes,$condition,$params);
$count =Post::model()->updateAll(array("username"=>"11111","password"=>"11111"),"password=:pass",array(":pass"=>"1111a1"));
if($count > 0){
    echo "修改成功";
}else{
    echo "修改失败";
}
 
$rt = PostList::model()->updateAll(array("status"=>"1"),"staff_postid=:staff AND host_postid=:host",array(":staff"=>$staff_postid,":host"=>$host_postid));

Post::model()->updateByPk($pk,$attributes,$condition,$params);
$count=Post::model()->updateByPk(1,array("username"=>"jack","password"=>"jack"));

$count=Post::model()->updateByPk(array(1,2),array("username"=>"jack1","password"=>"jack1"),"username=:name",array(":name"=>"jack"));

if($count > 0){
    echo "修改成功";
}else{
    echo "修改失败";
}
 
Post::model()->updateCounters($counters,$condition,$params);

$count=Post::model()->updateCounters(array("status"=>1),"username=:name",array(":name"=>"jack"));

if($count > 0){
    echo "修改成功";
}else{
    echo "修改失败";
}
//array("status"=>1)代表数据库中的post表根据条件username="jack",查询出的所有结果status字段都自加1

六、删除的方法

//deleteAll
Post::model()->deleteAll($condition,$params);
$count = Post::model()->deleteAll("username=:name and password=:pass",array(":name"=>"jack",":pass"=>"jack"));
$count = Post::model()->deleteAll("postid in("1,2,3")");//删除postid为这些的数据
if($count>0){
    echo "删除成功";
}else{
    echo "删除失败";
}
 
//deleteByPk
Post::model()->deleteByPk($pk,$condition,$params);
$count = Post::model()->deleteByPk(1);
$count =Post::model()->deleteByPk(array(1,2),"username=:name",array(":name"=>"jack"));
if($count>0){
    echo "删除成功";
}else{
    echo "删除失败";
}}

七、执行原生的SQL语句

$sql = "select t.*, t1.userphone, t1.truename, t1.usermail from {{member_contact}} t left join {{member}} t1 on t.userid = t1.userid where t.contactid in (1,2,3)";
$arrRows=Yii::app()->db->createCommand($sql)->query();
foreach ($arrRows as $k => $v){
 
}

八、事务处理 【多表更新插入操作请使用事务处理】

$transaction = Yii::app()->db->beginTransaction();
try{
                $arrOrderProfile = array(
                    "orderid"     => $orderId,
                    "userip"      => $userip,
                    "contactid" => $contactId,
                    "updatetime"=> $now
                );
                $modelOrderProfile = new RepairOrderProfile();
                $modelOrderProfile->attributes = $arrOrderProfile;
                if(!$modelOrderProfile->save()){
                    throw new CException("维修订单生成失败,通知事务回滚");
                }
                $recordCounter = Counter::model()->updateByPk(1,array("max_id"=>$orderId));
                if($recordCounter <= 0 )
                    throw new CException("订单计数器更新失败,通知事务回滚");
                $transaction->commit(); //提交事务会真正的执行数据库操作
}catch(Exception $e){
    file_put_contents("action.log", $e->getCode().":".$e->getMessage()."--".date("Y-m-d H:i:s",time()),FILE_APPEND);
    $transaction->rollback();
   
}