MODx querying custom db table - pdo

Question

See the code below. I'm trying to get some data from a database is modx. The data is there, meaning, when i query the database in phpmyadmin, i get results. I can't figure out why it doesnt work in modx.
$sql = 'SELECT * FROM orders ORDER BY created DESC LIMIT 1';
$stmt = $modx->prepare($sql);
$stmt->execute();
// Put data in array
$order_data = $stmt->fetch(PDO::FETCH_ASSOC);
if ($order_data == '') {
return 'Resultset empty for user '. $user_id.'.<br />'.$sql;
} else {
return 'Data found!';
}

Answer 1

Perhaps try using xPDO:
$sql = 'SELECT * FROM orders ORDER BY created DESC LIMIT 1';
$c = new xPDOCriteria($modx,$sql);
if ($c->stmt && $c->stmt->execute()) {
$order_data = $c->stmt->fetch(PDO::FETCH_ASSOC);
var_dump($order_data);
}

Answer 2

You need to loop through your output, the result will be an array of arrays.
The below example will return the data and present it according to a chunk format
<?php
$sql = "SELECT * FROM `table_name`";
$query = $modx->query($sql);
$rows = array();
if ($query) {
// loop through the result set and inspect one row at a time
while ($row = $query->fetch(PDO::FETCH_ASSOC)) {
array_push($rows, $row);
$output .= $modx->getChunk($tpl,$row);
}
}
$output = "<table border=\"1\" cellpadding=\"5\" >
<th>ID</th><th>row1_Head</th><th>row2_Head</th><th>row3_Head</th><th>row4_Head</th><th>row5_Head</th>
$output</table>";
return $output;
This is an example of the chunk:
<tr>
<td>[[+id]]</td> <td>[[+row1]]</td> <td>[[+row2]]</td> <td>[[+row3]]</td> <td>[[+row4]]</td> <td>[[+row5]]</td>
</tr>
Now in a resource call your snippet like
[[!Snippet_name? &tpl=`chunk_name`]]

Answer 3

$sql = 'SELECT * FROM orders ORDER BY created DESC LIMIT 1';
Assume your schema is like
<?xml version="1.0" encoding="UTF-8"?>
<model package="your_package_name" baseClass="xPDOObject" platform="mysql" defaultEngine="MyISAM" version="1.1">
<object class="Orders" table="orders" extends="xPDOSimpleObject">
<field key="order_no" dbtype="varchar" precision="255" phptype="string" null="false" />
<!-- and everything else below -->
</object>
<!-- and everything else below -->
</model>
What you need to do is as simple as this:
$modx->addPackage('your_package_name'); // Add your table schema to MODX object
$orders = $modx->getCollection('Orders'); // class's name, not table's name
$output = '';
if ($orders){
$outputArray = array();
foreach ($orders as $order) {
$orderArray = $order->toArray();
$outputArray[] = $modx->getChunk('your_row_chunk_name', $orderArray);
}
$wrapper = array(
'orders' => #implode("\n", $outputArray);
);
$output = $modx->getChunk('your_wrapper_chunk_name', $wrapper);
}
return $output;