Question

I’m using a windows xampp server running PHP 5.4 and the PHP Mongo driver from here.

I am querying the data using:

$results = $collection->find( array('league'=>'nba') );
  foreach ($results as $user) {
      var_dump($user);
      echo "</br>";
  }

Result:

array(5) { ["_id"]=> float(3.1677054844223E+18) ["league"]=> string(3) "nba" ["homeTeam"]=> string(10) "Washington" ...

I am converting the ID to a string:

$cursorID = new MongoID($result['_id']);
$gameLink = "<a href='/home/game/".$cursorID."'>".$cursorID."</a>";

which converts the ID from a float to this value: 50fde048f1568a204c0002a1
and trying to query for game details:

$gameID = new MongoID("50fde048f1568a204c0002a1"); //default
$con = new Mongo("mongodb://mongo.example.net"); // Connect to Mongo Server
$db = $con->selectDB('mydb');
$games = $db->games->find( array('_id'=>$gameID) );

But this does not return any results.

Thoughts on what could be going wrong?

Answer 1

Yea some one has been fiddling with your ObjectIds and they are no longer ObjectIds.

You need to be using ObjectIds to query by them hence you cannot query by an ObjectId (MongoId in PHP).

You should be able to query without wrapping the figure in a MongoId though since, if you have native_long set in your php.ini: http://php.net/manual/en/mongo.configuration.php#ini.mongo.native-long (which it is by default in the newer drivers I bellieve), the driver should automatically convert NumberLongs to and fro for you.

So literally just query by the $result['_id'] without putting it into a MongoId.

A word of caution though, using the _id you are not really that good and I would recommend you re-populate all your records again using ObjectId (MongoId in PHP) since this will be a lot more efficient and easier than the ID you are currently using.