Delete record behaviour (PHP/mySQL)

Question

I've just worked through this whole database thing from
scratch again after a little glitch, and it's all working pretty
well.
I do still have the issue with deleting records - I have the
search results page which is fine, and has a delete options at the
end of the row.
It was working just fine bringing up the 'confirm deletion'
page with the selected record - but it goes wrong after I add the
'delete record' server behaviour.
Basically after I do, when I click delete in the results
page, it skips the 'confirm deletion' page, going straight to the
'deletion confirmed' page. It's as tho' simply going to the
confirmation page is triggering the deletion, rather than requiring
the 'delete record' button to be pressed. Does the form / button
require an 'action'? Although as far as I can tell I followed the
instructions
correctly, but something is going wrong on the confirmation page.
It does still delete the record at least, but it would be
good to have the confirmation page.
Here's a link (if you need to log in use 'admin' and
'password'.)
link
This is all the script code in the 'confirm delete' page :
<?php require_once('../Connections/ConnHandprint.php');
?>
<?php
function GetSQLValueString($theValue, $theType,
$theDefinedValue = "", $theNotDefinedValue = "")
$theValue = (!get_magic_quotes_gpc()) ? addslashes($theValue)
: $theValue;
switch ($theType) {
case "text":
$theValue = ($theValue != "") ? "'" . $theValue . "'" :
"NULL";
break;
case "long":
case "int":
$theValue = ($theValue != "") ? intval($theValue) : "NULL";
break;
case "double":
$theValue = ($theValue != "") ? "'" . doubleval($theValue) .
"'" : "NULL";
break;
case "date":
$theValue = ($theValue != "") ? "'" . $theValue . "'" :
"NULL";
break;
case "defined":
$theValue = ($theValue != "") ? $theDefinedValue :
$theNotDefinedValue;
break;
return $theValue;
if ((isset($_GET['recordID'])) && ($_GET['recordID']
!= "")) {
$deleteSQL = sprintf("DELETE FROM Contacts WHERE
ContactID=%s",
GetSQLValueString($_GET['recordID'], "int"));
mysql_select_db($database_ConnHandprint, $ConnHandprint);
$Result1 = mysql_query($deleteSQL, $ConnHandprint) or
die(mysql_error());
$deleteGoTo = "contactdeleted.php";
if (isset($_SERVER['QUERY_STRING'])) {
$deleteGoTo .= (strpos($deleteGoTo, '?')) ? "&" : "?";
$deleteGoTo .= $_SERVER['QUERY_STRING'];
header(sprintf("Location: %s", $deleteGoTo));
$colname_Recordset1 = "1";
if (isset($_GET['recordID'])) {
$colname_Recordset1 = (get_magic_quotes_gpc()) ?
$_GET['recordID'] : addslashes($_GET['recordID']);
mysql_select_db($database_ConnHandprint, $ConnHandprint);
$query_Recordset1 = sprintf("SELECT * FROM Contacts WHERE
ContactID = %s", $colname_Recordset1);
$Recordset1 = mysql_query($query_Recordset1, $ConnHandprint)
or die(mysql_error());
$row_Recordset1 = mysql_fetch_assoc($Recordset1);
$totalRows_Recordset1 = mysql_num_rows($Recordset1);
?>
Any ideas?
Cheers

Answer 1

Hello,
S. Khawar wrote:
my question is that when I execute DELETE_RECORD built in it fails due to constraint restriction and Oracle forms raise message that "Child record exist/unable to delete record " until here it's Ok but Oracle Forms still removes record from the screen/form and move up the remaining records(although record is failed to delete).Yet this is the default forms behaviour. Because when you press delete it will remove from the screen but not from the database till you use COMMIT as francois mentioned.
I want the Oracle Form to do not remove record from screen/form once it's failed to delete record actually.Yes, for this type of requirement. Why don't you check dependency of record before removing the record. What i mean is you can use the code in KEY-DELREC trigger like below (before using the DELETE_RECORD built-in) for checking if child record exists then show message otherwise remove. For example...
DECLARE
  vCntRec NUMBER;
BEGIN
  SELECT COUNT(*)
  INTO vCntRec
  FROM child_table_name
  WHERE key_column = :form_key_column_name;
  IF vCntRec>0 THEN  -- Here means record found in child table so it will not remove from screen but message will appear.
    MESSAGE('<Your error message goes here...>');
    MESSAGE('<Your error message goes here...>');
    RAISE FORM_TRIGGER_FAILURE;
  ELSE  -- Here mean there is not dependency so it will remove which is default forms behaviour.
    DELETE_RECORD;
  END IF;
END;So, when you will press button for delete first it will check for any child record if exsits then it will display message and will not vanish from the screen otherwise it will remove from the screen and furthor COMMIT will remove from database.
-Ammad
Edited by: Ammad Ahmed on Jul 7, 2010 8:48 AM