5a739853
 patrick.he
commit
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<?php
$parent = isset($_POST['id']) ? (int)$_POST['id'] : 0;
$result = array();
$data = array();
try {
$db = new PDO('sqlite:data/treeview-city.sqlite');
//this query selects all records that are children of our requested $parent id
//all fields of each record is retrieved (c.*)
//also the following subquery adds a new field (child_count) to our records
//(SELECT COUNT(*) FROM city c2 WHERE c2.parent = c.id) = number of records that their parent id is equal to our record's id
foreach($db->query('SELECT c.* ,
(SELECT COUNT(*) FROM city c2 WHERE c2.parent = c.id) as child_count
FROM city c WHERE c.parent='.$parent)
as $row)
{
$item = array(
'text' => $row['text'] ,
'type' => $row['child_count'] > 0 ? 'folder' : 'item',
'additionalParameters' => array('id' => $row['id'])
);
if($row['child_count'] > 0)
$item['additionalParameters']['children'] = true;
else {
//we randomly make some items pre-selected for demonstration only
//in your app you can set $item['additionalParameters']['item-selected'] = true
//for those items that have been previously selected and saved and you want to show them to user again
if(mt_rand(0, 3) == 0)
$item['additionalParameters']['item-selected'] = true;
}
$data[$row['id']] = $item;
}
$result['status'] = 'OK';
$result['data'] = $data;
}
catch(PDOException $ex) {
$result['status'] = 'ERR';
$result['message'] = $ex->getMessage();
}
echo json_encode($result);
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