Codeigniter，事务中的错误跟踪

Question

我正在CodeIgniter中运行一些方法来在数据库（同一个表）中插入一些行。我想看看在事务内哪个插入失败（通过返回一个标题数组）。我的代码是：

$failure = array(); //the array where we store what failed 
$this->db->trans_start(); 
foreach ($data as $ressourceCsv){ //data is an array of arrays to feed the database 
    $this->ajout_ressource($ressourceCsv); //method to insert (basically, just an insert with active record) 
    if (($this->db->_error_message())!=null) { 
      $failure[] = $ressourceCsv['title']; 
    } 
} 
$this->db->trans_complete(); 
return $failure; 

的事实是，如果我不让它交易（无$这个 - > DB->反式_...），它完美的作品，我有一个包含几个数组标题。但是对于事务，数组包含自第一个错误以来的所有标题。有没有办法只从插入导致事务回滚的标题？

我也曾尝试用：

$failure = array(); //the array where we store what failed 
$this->db->trans_start(); 
foreach ($data as $ressourceCsv){ //data is an array of arrays to feed the database 

    if (!$this->ajout_ressource($ressourceCsv)) { //active record insertion return true 
      $failure[] = $ressourceCsv['title']; // if successful 
    } 
} 
$this->db->trans_complete(); 
return $failure; 

Answer 1

我认为，一旦一个事务中出现错误，你必须以前更多的DB MODS回退可。这将解释你所看到的行为。第一个错误之后，事务被“中止”，并且继续循环，导致每个后续的SQL命令都失败。

db=# select * from test1; 
id | foo | bar 
----+-----+----- 
(0 rows) 

db=# begin; 
BEGIN 
db=# insert into test1 (foo, bar) values (1, 'One'); 
INSERT 0 1 
db=# insert into test1 (foo, bar) values (Oops); 
ERROR: column "oops" does not exist 
LINE 1: insert into test1 (foo, bar) values (Oops); 
              ^
db=# insert into test1 (foo, bar) values (2, 'Two'); 
ERROR: current transaction is aborted, commands ignored until end of transaction block 
db=# select * from test1; 
ERROR: current transaction is aborted, commands ignored until end of transaction block 
db=# commit; 
ROLLBACK 
ace_db=# select * from test1; 
id | foo | bar 
----+-----+----- 
(0 rows) 

db=# 

注意似乎“承诺”做了“回退”，如果有错误（这不是一个错字。）

而且BTW：使用$this->db->trans_status() === FALSE检查这可以说明如下在交易过程中发生错误。

更新：这里的一些（未经测试）的代码做一个交易，以使刀片不被别人看到，直到你准备：

$failure = array(); //the array where we store what failed 
$done = false; 
do { 
    $this->db->trans_begin(); 
    foreach ($data as $key => $ressourceCsv){ //data is an array of arrays to feed the database 
     $this->ajout_ressource($ressourceCsv); //method to insert (basically, just an insert with active record) 
     if ($this->db->trans_status() === false) { // an insert failed 
      $failure[] = $ressourceCsv['title']; // save the failed title 
      unset($data[$key]);     // remove failed insert from data set 
      $this->db->trans_rollback();   // rollback the transaction 
      break;         // retry the insertion 
     } 
    } 
    $done = true;         // completed without failure 
} while (count($data) and ! $done);    // keep going until no data or success 

/* 
* Two options (uncomment one): 
* 1. Commit the successful inserts even if there were failures. 

$this->db->trans_commit(); 

* 2. Commit the successful inserts only if no failures. 

if (count($failure)) { 
    $this->db->trans_rollback(); 
} else { 
    $this->db->trans_commit(); 
} 
*/ 

return $failure;