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Trying to Avoid duplicate entries

Thread began 5/10/2009 12:46 am by mustang_sally_85344510 | Last modified 5/12/2009 1:43 pm by Ray Borduin | 3168 views | 15 replies |

mustang_sally_85344510

Trying to Avoid duplicate entries

Hello,
I was wondering how to avoid a dupicate entry into a DB.? For example, I have a table that I want a user to only be able to enter data into ONCE.
Which WA extention would be best for this. I have WA Supersuite.
I would like to check/validate the database by visitorID.

Thank you in advance for steering me in the right direction! :)

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Ian

Is VisitorID the unique ID for the table? If so, it should be set to auto increment anyway.

However, if Visitor ID is another field in the table then the best way to do this is call a recordset on "Post" of the form against the values in the form, check to see if the recordset is populated. If it is then present an error and if it isnt then use Data Assist to insert the record.

I might be wrong but I dont think Data Assist will do all this for you - you need to do a bit of manual coding to acheive the result.

Cheers
Ian

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mustang_sally_85344510

visitorID is NOT the unique ID in this particular table. Is is NOT the autoincrement field. I don't remember DATAASSIST asking for compare to variables....I do however recall SecurityAssist asking for what compare to variables...? Thank you for your input, and I'll give it a try! :)

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Ray BorduinWebAssist

I would create a recordset filtered by the id and use validation toolkit to validate that no records are returned from that recordset.

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mustang_sally_85344510

when if filter the recordset...specifically...could you please give me the exact language to filter? My insert record has the "hidden" value for the visitorID, which is carried by the loginvisitorID,...so do I used the visitorID session variable, entered value or what? I do appreciate your help! :)

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Ray BorduinWebAssist

Filter using the simple recordset wizard. Filter from the submitted form element based on the field that you want to ensure is unique.

The first step is to create the recordset that shoudl return no results if there are no repeats and one result if there are repeats.

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mustang_sally_85344510

Was wondering...
Does it make any difference if I have "Security Assist Access to page" applied to the same page? as, I do...

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Ray BorduinWebAssist

It shouldn't but I guess it depends on your workflow and settings. It won't interfere directly, but it could cause an unrelated problem that could be confusing.

Maybe remove the restrict access server behavior if you think it might be causing issues and add it back once everything else is working.

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mustang_sally_85344510

Hi again,
I removed page access...At this point nothing can be entered.
Here is VALADATION code.
<?php
if (isset($_POST["submitcenter"])) {
$WAFV_Redirect = "alreadyentered.php";
$_SESSION['WAVT_centerinput_Errors'] = "";
if ($WAFV_Redirect == "") {
$WAFV_Redirect = $_SERVER["PHP_SELF"];
}
$WAFV_Errors = "";
$WAFV_Errors .= WAValidateNM($row_rsverify['VisitorID'] . "",0,0,"",",.",true,1);

if ($WAFV_Errors != "") {
PostResult($WAFV_Redirect,$WAFV_Errors,"centerinput");
}
}
?>

Here is recordset code:
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
$theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;

$theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($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;
}
}

$colname_rsverify = "-1";
if (isset($_POST[''])) {
$colname_rsverify = (get_magic_quotes_gpc()) ? $_POST[''] : addslashes($_POST['']);
}
mysql_select_db($database_bowlingtournaments, $bowlingtournaments);
$query_rsverify = sprintf("SELECT VisitorID FROM centers WHERE VisitorID = %s", GetSQLValueString($colname_rsverify, "text"));
$rsverify = mysql_query($query_rsverify, $bowlingtournaments) or die(mysql_error());
$row_rsverify = mysql_fetch_assoc($rsverify);
$totalRows_rsverify = mysql_num_rows($rsverify);
?>

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Ray BorduinWebAssist

Make sure to move the recordset code above the validation code, and the line:

$WAFV_Errors .= WAValidateNM($row_rsverify['VisitorID'] . "",0,0,"",",.",true,1);

should be:

$WAFV_Errors .= WAValidateNM($totalRows_rsverify . "",0,0,"",",.",true,1);

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