lastInsertId() variable in PHP not returning records when used in a select statement

Posted on 2013-11-15
Medium Priority
Last Modified: 2013-11-15
Hi all.

I have the following code that is supposed to return some records based on lastInsertId() that is stored as a variable. Unfortunately, it's not returning any records when used in the select statements.

ShortageID is an INT data type and the select statement works when I remove the WHERE clause in the select statement. It returns all records, when I just want the record whose ShortageID = $ID.

What's wrong with my syntax?

Thank you in advance.

  $query = " 
            INSERT INTO ShortageDataEntry ( 
            ) VALUES ( 

        // Here we prepare our tokens for insertion into the SQL query.  
        $query_params = array( 
            ':ShortageProduct' => $_POST['ShortageProduct'], 
            ':Quantity' => $_POST['Quantity'], 
            ':userid' => $_SESSION['user']['userid'] ,
            ':currentdatetime' => $fdate

$stmt = $db->prepare($query); 
            $result = $stmt->execute($query_params); 

 $smt = $db->prepare("SELECT ShortageProduct FROM ShortageDataEntry INNER JOIN ShortageProducts ON ShortageDataEntry.ShortageProductID = ShortageProducts.ShortageProductID WHERE ShortageDataEntry.ShortageID = '$ID'");

 $smt->bindColumn('ShortageProduct', $shortageproduct);

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Question by:Sim1980
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LVL 84

Expert Comment

by:Dave Baldwin
ID: 39651816
It may not be working because you are not using an 'autoincrement key field'.  That is what it is supposed to return.

Author Comment

ID: 39651837
I am using an autoincrement field.

 CREATE  TABLE  `myDB`.`ShortageDataEntry ` (  `ShortageID` int( 11  )  NOT  NULL  auto_increment ,
 `ShortageProductID` int( 11  )  NOT  NULL ,
 `Quantity` decimal( 11, 2  )  NOT  NULL ,
  `UserID` int( 11  )  NOT  NULL ,
 `CreateDate` datetime NOT  NULL ,
 PRIMARY  KEY (  `ShortageID`  )  ) ENGINE  =  MyISAM  DEFAULT CHARSET  = utf8;
LVL 111

Expert Comment

by:Ray Paseur
ID: 39651906
What data base are you using?  What is the value that is returned in $ID?  How do you know if $stmt->execute() worked?
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Author Comment

ID: 39651915
It's a MySQL database.

And I know it works because it inserts the new record in the table.

Accepted Solution

loki0609 earned 2000 total points
ID: 39651931
what driver for pdo are you using?

"Returns the ID of the last inserted row, or the last value from a sequence object, depending on the underlying driver. For example, PDO_PGSQL requires you to specify the name of a sequence object for the name parameter."
LVL 111

Expert Comment

by:Ray Paseur
ID: 39652000
know it works because it inserts the new record in the table.
Wrong answer!  You know it worked, but there is a return value from the method and the script should be testing that return value.  You should also visualize the $ID value.

This article shows how I've mapped the MySQL functions to PDO.  I have found no trouble getting the id in these examples.

Author Closing Comment

ID: 39652023
Thank you loki.
LVL 111

Expert Comment

by:Ray Paseur
ID: 39652048
What was the solution?  The accepted answer is a cut-and-paste from the online man page for pdo::lastInsertId() and DaveBaldwin posted that link in the first response.

Expert Comment

ID: 39652055
hey... i want you to know I have MAD skillzzz when coming to cut and paste:)

that being said sometimes a cut and paste saves you from typing the exact same thing as what was already said...
LVL 111

Expert Comment

by:Ray Paseur
ID: 39652262
@loki0609: Me, too (sometimes I even read the fine manuals).  But I just want the author of the question to tell us what fixed his issue.

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