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Homephp教程php手册yii 数据库添加,修改,删除相关操作总结

yii 数据库添加,修改,删除相关操作总结

本文总结了yii中关于数据信息的添加数据,修改数据,删除数据的相关操作,刚刚学习没几天,仅记录了一些,以后慢慢再充实,有需要的朋友可以看看。

添加数据的方法

(1)save 方法(对象形式操作)

$user=new User;
$user->username='phpernote';
$user->password='123456';
if($user->save()>0){
    echo '添加成功';
}else{
    echo '添加失败';
}

(2)insert 方法(数组形式操作)

Yii::app()->dbName->createCommand()->insert('tbl_user',
    array(
        'username'=>'phpernote',
        'password'=>'123456'
 )
);

(3)insert 方法(对象形式操作)

$user=new User();
$user->username='phpernote';
$user->password='123456';
if($user->insert()){
    echo '添加成功';
}else{
    echo '添加失败';
}

修改数据的方法

(1)Post::model()->updateAll($attributes,$condition,$params);
 
$count=User::model()->updateAll(array('username'=>'phpernote','password'=>'123456'),'id=:id',array(':id'=>$id));
if($count>0){
    echo '修改成功';
}else{
    echo '修改失败';
}
 
(2)Post::model()->updateByPk($pk,$attributes,$condition,$params);
 
$count=User::model()->updateByPk(1,array('username'=>'admin','password'=>'123456'));

或者

$count=User::model()->updateByPk(array(1,2),array('username'=>'admin','password'=>'123456'),'username=:name',array(':name'=>'admin'));
if($count>0){
    echo '修改成功';
}else{
    echo '修改失败';
}
$pk代表主键,可以是一个也可以是一个集合,$attributes代表是要修改的字段的集合,$condition代表条件,$params传入的值
 
(3)Post::model()->updateCounters($counters,$condition,$params);
 
$count =User::model()->updateCounters(array('status'=>1),'username=:name',array(':name'=>'admin'));
if($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字段都自动加 1

User::model()->updateCounters(array('count'=>1), 'id='.User::model()->id);//自动叠加 1

User::model()->updateCounters(array('count'=>-1), 'id='.User::model()->id);//自动递减 1

(4)Yii::app()->dbName->createCommand()->update($attributes,$condition,$params);

Yii::app()->dbName->createCommand()->update('tbl_user',
    array(
        'username'=>'phpernote'
 ),
 'id=:id',
 array(
        ':id'=>3
 )
);

删除数据的方法
 
(1)Post::model()->deleteAll($condition,$params);

例如:
 
$count=User::model()->deleteAll('username=:name AND password=:pass',array(':name'=>'phpernote',':pass'=>'123456'));

或者:

$count=User::model()->deleteAll('id in("1,2,3")'); //删除id为这些的数据
if($count>0){
    echo '删除成功';
}else{
    echo '删除失败';
}
 
(2)Post::model()->deleteByPk($pk,$condition,$params);

例如:

$count=User::model()->deleteByPk(1);

或者:

$count=User::model()->deleteByPk(array(1,2),'username=:name',array(':name'=>'admin'));
if($count>0){
    echo '删除成功';
}else{
    echo '删除失败';
}

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