Yii 1.0数据库操作 查询、增加、更新、删除

摘要：根据条件查询一个集合根据主键查询一个集合可以使用多个主键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根据语句查询一个数组根据主键查询出一个对象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根据

1、根据条件查询一个集合

$objectResult=Post::model()->findAll($condition,$params);
$oClasses = classes::model()->findAll(array(
            "select"=>"classId,className,grade,type,status",
            "condition"=>"classId=21 and grade=1",
            "order"=>"createtime desc",
        ));
$objectResult=Post::model()->findAll("username=:name",array(":name"=>$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();
   
}