Yii20 In the operation of inserting multiple records, the reason why the old attribute value affects the insertion operation

We sometimes encounter insert and update operations in our projects.

Because if you use $this->setOldAttributes(null);, it means clearing its original record. It will default to the original old attributes that do not exist. Then it thinks that the current record is new, so it An insertion operation will be performed, so we cannot clear its old properties.

2: For insertion:

I print $this during the insertion operation, and it returns me a result like this:

private $_attributes => //这次现在的这条属性
  array(7) {
    'app_id' =>
    string(6) "100000"
    'hour' =>
    string(2) "21"
    'stat_day' =>
    string(10) "2015-07-13"
    'total' =>
    int(1)
    'id' =>
    string(16) "1000002015071321"
    'create_time' =>
    int(1449326053)
    'update_time' =>
    int(1449326053)
  }
  private $_oldAttributes =>   //此时,它将旧的属性给与了此时的值
  array(7) {
    'app_id' =>
    string(6) "100000"
    'hour' =>
    string(2) "21"
    'stat_day' =>
    string(10) "2015-07-13"
    'total' =>
    int(1)
    'id' =>
    string(16) "1000002015071321"
    'create_time' =>
    int(1449326053)
    'update_time' =>
    int(1449326053)
  }
  private $_related =>
  array(0) {
  }
  private $_errors =>
  array(0) {
  }
  private $_validators =>
  class ArrayObject#48 (1) {
    private $storage =>
    array(0) {
    }
  }
  private $_scenario =>
  string(7) "default"
  private $_events =>
  array(0) {
  }
  private $_behaviors =>
  array(0) {
  }
}

When we" When "inserting" the first record, the program will record this record into the old attributes, which is the $_oldAttributes attribute above. Then when we "insert" the second record below, the program will see If there is a value in the $_oldAttributes attribute in the object (no matter what value it is), it defaults to the record already existing, so it will perform an "update" operation, but our current purpose is to let the program perform an "insert" operation. How can we do this? It "updates" that, so at this time we use $this->setOldAttributes(null) to clear $_oldAttributes every time we "insert", Then any time, when a new record is "inserted" later, the program checks that the $_oldAttributes attribute is null, so it naturally follows our operation to "insert" the new record!!

We used $this-> ; SetOLDATTRIBUTES (NULL); Come to clear the old attributes so that the following new records need to be inserted in .

Now the example of my project:

public function actionOfflineUserImport()
    {
        $mTempUser = new TempUser();
        //取出学霸表中的所有的用户信息
        $tempUsers = $mTempUser->find()->select('mobile, truename, weixin, corp, position')->asArray()->all();

        if (!$tempUsers) {
            echo  "无用户需要同步\n";
            exit(2);
        }

        // 遍历所有的用户信息，并将每一项插入到另一个数据库中表中
        foreach ($tempUsers as $key => $values) {
            //重点在这里： 我们需要每次都重新实例化对象，不然他就会出现上面的情况旧的属性存在，导致他们不认为是添加数据
              这里我采用的和上面的不一样，如果你有很多条数据，你传递到model中，需要遍历添加数据，这种情况你可以用上面的清空属性的方法来解决
            $mAccount = new Account();
            $mHmcUser = new HmcUser();  之前我没把这两个对象放到遍历里面，而是放到了方法头部，导致了我添加数据不成功 ？？这里一定要注意啊！！！

            if (!isset($values['mobile']) || !$values['mobile']) {
                echo "手机号码不存在\n";
                exit(3);
            }

            $mobile = $values['mobile'];
            $isMobile = $mAccount->isExistMobile($mobile);

            if (!$isMobile) {

                try {
                    $key = 'user:id:pool';
                    $cache = Yii::$app->cache->instance('base');

                    if (!($cache->lpop($key))) {
                        echo  "获取用户ID失败\n";
                        exit(4);
                    } else {
                        $values['user_id'] = $cache->lpop($key);
                    }
                } catch (\Exception $e) {
                    echo  "连接redis服务器失败,请稍后重试\n";
                    exit(5);
                }

                $data['user_id'] = $values['user_id'];
                $data['mobile'] = $values['mobile'];
                $accountData = $mAccount->addCrm($data, $status = Account::STATUS_UNINIT);
                $usersData = $mHmcUser->add($values);

                if (!$accountData) {
                    echo  $mobile . "同步account表 => 失败\n";
                } else {
                    echo  $mobile . "同步account表 => 成功\n";
                }

                if (!$usersData) {
                    echo  $mobile . "同步到 user表 => 失败\n";
                } else {
                    echo  $mobile . "同步到 user表 => 成功\n";
                }
            }
        }

        exit(0);

    }

Supplement:

Today I knew that one can enter in the command line: echo $ $ $ $ $ ? What is displayed is the status (code) of the last command execution

          0 means that the last command was executed successfully

The above introduces the reasons why old attribute values ​​affect the insertion operation when inserting multiple records in Yii20, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.