CODEWITHSUNDEEP
phpjqueryajaxdatatable
Sebastian
Sebastian

Reputation: 865

Simple DataTable initialization with Ajax and PHP

I'm just having some trouble initializing a DataTable using Ajax and PHP. According to the inspector the error is:

Uncaught TypeError: Cannot read property 'length' of undefined jquery.dataTables.js:2649
(anonymous function) jquery.dataTables.js:2649
oSettings.jqXHR.$.ajax.success jquery.dataTables.js:8749
c jquery.js:3048
p.fireWith jquery.js:3160
k jquery.js:8235
r jquery.js:8778

I've followed the instructions as on datatable website but apparently I'm doing something wrong. It's not the php part, I've just checked it and it is returning a json file.

Here's what I've got.

Thanks in advance.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Chromo Insiders</title>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="DataTables/media/js/jquery.dataTables.js"></script>
<script type="application/javascript" language="javascript" src="insiders.js"></script>
<link rel="stylesheet" type="text/css" href="ci_style.css" />
<style type="text/css">
    @import 'DataTables/media/css/demo_table_jui.css';
</style>
</head>

<body>

<header>
    <h1>Chromo Insiders</h1>
</header>

<table id="datatables">
    <thead>
        <tr>
            <th>email</th>
            <th>Last Name</th>
            <th>First Name</th>
            <th>Date Registered</th>
        </tr>
    </thead>
    <tbody>
    </tbody>
</table>
</body>
</html>

Here's the script:

$(document).ready(function(e) {


$('#datatables').dataTable( {
        "bProcessing": true,
        "sAjaxSource": 'process.php'
    } );

});

Just in case you need to take a look to the php code:

<?php

        try {
            $conn = require_once 'dbConnect.php';

            $sql = "SELECT email, lastName, firstName, state, dateRegistered FROM Users";

            $result = $conn->prepare($sql) or die ($sql);

            if(!$result->execute()) return false;

            if($result->rowCount() > 0) {
                $json = array();
                while($row = $result->fetch()){
                    $json[] = array(
                        'email' => $row['email'],
                        'lastName' => $row['lastName'],
                        'firstName' => $row['firstName'],
                        'dateRegistered' => $row['dateRegistered'],
                        'state' => $row['state']
                    );
                }

                $json['success'] = true;
                echo json_encode($json);
            }
        } catch(PDOException $e) {
            echo 'Error: ' . $e->getMessage();
        }
?>

Upvotes: 0

Views: 13596

Answers (1)

Frank Conry
Frank Conry

Reputation: 2716

You need to change your response as such:

        if($result->rowCount() > 0) {
            $json = array();
            while($row = $result->fetch()){
                /**  MAKE ARRAY NON ASSOCIATIVE **/
                $json[] = array(
                    $row['email'],
                    $row['lastName'],
                    $row['firstName'],
                    $row['dateRegistered'],
                    $row['state']
                );
            }
            /*** MAKE RESPONSE HAVE 'aaData' ENTRY ****/
            $response = array();
            $response['success'] = true;
            $response['aaData'] = $json;
            echo json_encode($response);

Reference here: http://datatables.net/release-datatables/examples/data_sources/ajax.html. Specifically:

DataTables expects an object with an array called "aaData" with the data source.

Also your table does not have a 'state' column, although your ajax response does...

Upvotes: 1

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