Question

I’m using MongoDB with PHP to store songs which users add via a basic form. The collection I created looks like below.

$object = array(
    "trackName" => "Sju sorger",
    "artistName" => "Veronica Maggio",
    "albumName" => "Satan i Gatan",
     );
$collection->save($object);

What I trying to accomplish is to check if a song is already in the collection. If the song user trying to add is not already in the collection, it’d be added. If it is already in the collection, a notification stating that the song is already in the collection will be displayed.

I’m relatively new to MongoDB but I assume I can check if the song is already in the collection by checking the _id of the document. But I have no idea on how to accomplish that.

Any help would be much appreciated.

Answer 1

Use this approach.

  <?php
    try {
      // open connection to MongoDB server
      $conn = new Mongo('localhost');

      // access database
      $db = $conn->test;

      // access collection
      $collection = $db->items;

      // GET TRACK NAME
      $trackname = 'placetracknamehereifsearchingbytrackname';
      // retrieve existing document
      $criteria = array(
        'trackName' => trackname ,
      );
      $doc = $collection->findOne($criteria);

      if(!empty($doc) {
         echo 'Data Already Exist';
      } else {
  // insert a new document
  $object = array(
    "trackName" => "Sju sorger",
    "artistName" => "Veronica Maggio",
    "albumName" => "Satan i Gatan",
     );
     $collection->save($object);
     echo 'Added Successfully!';
}
      // disconnect from server
      $conn->close();
    } catch (MongoConnectionException $e) {
      die('Error connecting to MongoDB server');
    } catch (MongoException $e) {
      die('Error: ' . $e->getMessage());
    }
    ?>

use this resource for further.

Mongo Resource