PHP开启事务回滚（TP，全面）

1.没有建立Model的情况下：

a.自动处理回滚：

Db::transaction(function(){
Db::table('ns_admin')->delete(1);
});

b.手动操作事务:

// 启动事务
Db::startTrans();
try{
Db::table('ns_admin')->delete(1);
// 提交事务
Db::commit();
} catch (Exception $e) {
// 回滚事务
Db::rollback();
}

 实列：

public function cardPlan(){
//0未执行，1已执行
$rew = Db::table('ns_state')->where('id',1)->value('state');
if($rew == 0){
//购买月卡，年卡
$card = Db::table('ns_member')->where(['card_frequency'=>['>',0]])->select();
//开启事务
Db::startTrans();
try{
for($i=0;$i<count($card);$i++){
//卡次数减一
Db::table('ns_member')->where('uid',$card[$i]['uid'])->setDec('card_frequency');
//修改积分余额
$account = Db::table('ns_member_account')->where('uid',$card[$i]['uid'])->find();
$date = [];
$date['balance'] = $account['goods_point'] + $account['balance'];
$date['goods_point'] = 0;
Db::table('ns_member_account')->where('uid',$card[$i]['uid'])->setField($date);
//添加记录
if($account['goods_point'] > 0 ){
//积分记录
$data = [];
$data['uid'] = $account['uid'];
$data['account_type'] = 4;//4是冻结积分
$data['sign'] = 0;
$data['number'] = '-'.$account['goods_point'];
$data['from_type'] = 40;
$data['text'] = '转出'.$account['goods_point'].'冻结积分到余额';
$data['create_time'] = time();
Db::table('ns_member_account_records')->insert($data);
//余额记录
$date = [];
$date['uid'] = $account['uid'];
$date['account_type'] = 2;//2是余额
$date['sign'] = 1;
$date['number'] = $account['goods_point'];
$date['from_type'] = 40;
$date['text'] = '转入'.$account['goods_point'].'冻结积分到余额';
$date['create_time'] = time();
Db::table('ns_member_account_records')->insert($date);
}
}
//未购买
$card = Db::table('ns_member')->where(['card_frequency'=>0])->select();
for($i=0;$i<count($card);$i++){
//修改积分
$account = Db::table('ns_member_account')->where('uid',$card[$i]['uid'])->find();
$date = [];
$date['goods_point'] = 0;
Db::table('ns_member_account')->where('uid',$card[$i]['uid'])->setField($date);
//添加记录
if($account['goods_point'] > 0 ){
$data = [];
$data['uid'] = $account['uid'];
$data['account_type'] = 4;//4是冻结积分
$data['sign'] = 0;
$data['number'] = '-'.$account['goods_point'];
$data['from_type'] = 40;
$data['text'] = '未购买月卡或年卡，消除'.$account['goods_point'].'冻结积分';
$data['create_time'] = time();
Db::table('ns_member_account_records')->insert($data);
}
}
$state = [];
$state['state'] = 1;
$state['time'] = time();
Db::table('ns_state')->where('id',1)->setField($state);
// 提交事务
Db::commit();
} catch (Exception $e) {
// 回滚事务
Db::rollback();
}
}
}

注意：1：在没有model的情况下，在能用Db类的情况里，可以用Db加双冒号开启 ，关闭事务。

           2：一个方法只能开启一个完整事务，开启多个会出错。

2.建有Model的情况下：

public function unionPartnerReward()
{
$ns_member = new NsMemberModel();
$ns_member_account =new NsMemberAccountModel();
$ns_member_account_records = new NsMemberAccountRecordsModel();
//获取当前时间 开始时间 和结束时间
// 防止重复发放。
$dateStr = date('Y-m-d', time());
$timestamp0 = strtotime($dateStr);
$timestamp24 = strtotime($dateStr) + 86400 - 1;
$reward_where['create_time'] = array('between',[$timestamp0,$timestamp24]);
$reward_where['from_type'] = 33;
$reward_where['account_type'] = 2;
$reward_msg =
$ns_member_account_records->where($reward_where)->limit('0,1')->select();
if($reward_msg){
return;
}
//股东信息
$condition['agent_level'] = 4;
$unionPartnerList = $ns_member->getQuery($condition, "uid", "");
//加权分红配置
$config = new ConfigModel();
$other_set = $config->getInfo(['key'=>'OTHER_SET'],'value');
$other_set = json_decode($other_set['value'],true);
$money = $other_set[1]['value_num'];
//累计消费盒数
$all_num = $ns_member_account->sum('goods_num');
$count = count($unionPartnerList);
$all_money =
$all_num * $money; //今日累计加权值
if($count>0){
//平均每位股东分红金额
$avg_money = sprintf("%.2f",$all_money/$count);
}
$time = time();
$partner_reward = array();
$ns_member_account->startTrans();//开启事务
try{
if(isset($avg_money) && $avg_money>0){
foreach ($unionPartnerList as $k => $v) {
$partner_reward[$k]['uid'] = $v['uid'];
$partner_reward[$k]['shop_id'] = 0;
$partner_reward[$k]['account_type'] = 2;
$partner_reward[$k]['sign'] = 1;
$partner_reward[$k]['number'] = $avg_money;
$partner_reward[$k]['from_type'] = 33; //加权分红奖励
$partner_reward[$k]['data_id'] = 0;
$partner_reward[$k]['text'] = '加权分红奖励';
$partner_reward[$k]['create_time'] = $time;
$ns_member_account->where(['uid'=>$v['uid']])->setInc('balance',$avg_money);
}
$ns_member_account_records->saveAll($partner_reward);
}
$ns_member_account->commit();
}catch (Exception $e){
$ns_member_account->rollback();
}
}

注意：在建有model的时候，可以 new model（名），直接指向来开启，关闭事务回滚！

//事务回滚：
$model=M('myself_audio');
//事务开启
$model->startTrans();
$list=$model->where('id',$id)->delete();
if(!$list){
//事务回滚
$model->rollback();
}
$id = M('thumb')->field("id")->where('d'.$id)->select();
foreach ($id as $val=>$vl){
$ids[]=$vl['id'];
}
$idd=implode(",",$ids);
$where['id']=array("in",$idd);
$lists = M('thumb')->where($where)->delete();
if(!$lists){
//事务回滚
$model->rollback();
}
//事务提交
$model->commit();

3.有model，不用try，也可以用if，else：

//  在User模型中启动事务
$User->startTrans();
 // 进行相关的业务逻辑操作
$Info = M("Info"); // 实例化Info对象
$Info->save($User); // 保存用户信息
 if (操作成功){
    // 提交事务
    $User->commit(); 
 }else{
   // 事务回滚
   $User->rollback(); 
 }

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