Error rewriting PHP PDO query to FluentPDO query issue

Question

I'm using PHP PDO with MS SQL Server. The following works just fine. The results are an array of locations, as expected.

function getAllCentersOld() {
global $fpdo, $pdo;
$query = $pdo->query("SELECT" 
    ." [LOCID]"
    .", [LOCNAME]"
    .", [LOCSHORT]"
    .", RIGHT('00'+ CAST([CENTER] as varchar(4)),4) as CENTER"
    .", [LAT]"
    .", [LONG]"
    .", [LOCATION_ID]"
    ." FROM locs2 with (nolock) WHERE LOCNAME <> 'Someplace'"
    ." ORDER BY LOCNAME asc");
$result = $query->fetchAll(PDO::FETCH_ASSOC);
foreach ($result as $row) {
    $rows[] = $row;
}
return json_encode($rows);
}

But, when I try to use FluentPDO to build out the query, I can't seem to use the select method. I'm getting the error that follows.

function getAllCenters() {
global $fpdo, $pdo;
$query = $fpdo->from('locs2')
        ->select('[LOCID], [LOCNAME], [LOCSHORT]')
        ->where(array("LOCNAME <> ?" => "Someplace"))
        ->orderBy("LOCNAME asc")
        ;
$result = $query->fetchAll(PDO::FETCH_ASSOC);
foreach ($result as $row) {
    $rows[] = $row;
}
return json_encode($rows);
}

Uncaught exception 'Exception' with message 'Objects returned by SelectQuery::getIterator() must be traversable or implement interface Iterator' in ....{remove}... FluentPDO/SelectQuery.php:116 ... SelectQuery::fetchAll() ...

If I comment out the select line above, it works. Otherwise I get the following error. Is anyone familiar with this library? I thought it would operate as on the Web site.

http://fluentpdo.com/documentation.html#select

Answer 1

I don't know this library but I've look at the source at github. $query is not a PDOStatement object so fetchAll like you called it will not work.

$query is a SelectQuery object which also have a fetchAll method but with other arguments:

/** Fetch all row
 * @param string $index  specify index column
 * @param string $selectOnly  select columns which could be fetched
 * @return array of fetched rows
 */
public function fetchAll($index = '', $selectOnly = '') {
    ...

The easiest way would be to directly iterate the $query object because it implements IteratorAggregate . (not directly but through inheritance)

So following should work:

$rows = array();
foreach ($query as $row) {
    $rows[] = $row;
}

Answer 2

I think I just found the answer. The select "*" needs to be cleared out first. The following seems to work.

->select(null)->select('[LOCID], [LOCNAME], [LOCSHORT]')

I also need to revise the PDO parameter binding in the where() method. It seems that this library is a bit different than expected (notice 'PDO::FETCH_ASSOC' is not needed). Full working code below:

function getAllCenters() {
global $fpdo, $pdo;
$query = $fpdo->from('z_cc_locs2')
        ->select(null)->select("[LOCID], [LOCNAME], [LOCSHORT], RIGHT('00'+ CAST([CENTER] as varchar(4)),4) as CENTER, [LAT], [LONG], [LOCATION_ID]")
        ->where("LOCNAME <> :name", array(':name' => 'Formosa'))
        ->orderBy("LOCNAME ASC");
$result = $query->fetchAll();
foreach ($result as $row) {
    $rows[] = $row;
}
return json_encode($rows);
}