php - 如何使用 PHP 代码从 mongodb 中名为组的集合中获取数据

Question

这是我从 mongodb 中的集合中获取数据的 PHP 代码:

$m = new Mongo('localhost');
$m->connect();
$db = $m->mydb;
$collection = $db->fields_current;
$cursor = $collection->find();
foreach ($cursor as $obj) {
    echo $obj["title"] . "\n";
}

该代码适用于集合 fields_current。但是，我有一个像这样的集合 fields_current.node 其中 node 是集合的命名组。如何从命名组中获取数据。

编辑:

按照 PeterM 的回答后，我得到一个空的 MongoCursor 对象。这是我的新代码:

$m = new Mongo('localhost');
$m->connect();
$db = $m->mydb;
$collection = $db->fields_current;
$query = array(array('group_name' => 'node', 'type' => 'content-type'), array('title' => 1)); // SELECT title FROM fields_current WHERE group_name = 'node' AND type = 'content-type'
$cursor = $collection->find($query);
foreach ($cursor as $obj) {
    echo $obj["title"] . "\n";
}

更多细节:我正在使用 Drupal，node 指的是“节点”表，type 是“节点类型” .集合名称是 fields_current.node，记录结构是这样的:

array (
  '_id' => new MongoInt32(37),
  '_type' => 'node',
  '_bundle' => 'content-type',
  '_revision_id' => new MongoInt32(37),
  'nid' => new MongoInt32(37),
  'vid' => new MongoInt32(37),
  'type' => 'content-type',
  'language' => 'und',
  'title' => 'title',
  'uid' => new MongoInt32(1),
  'status' => new MongoInt32(1),
  'created' => new MongoInt32(1342065549),
  'changed' => new MongoInt32(1342065549),
  'comment' => new MongoInt32(1),
  'promote' => new MongoInt32(0),
  'sticky' => new MongoInt32(0),
  'tnid' => new MongoInt32(0),
  'translate' => new MongoInt32(0),
  'field_cutom_field' => 
  array (
    'value' => 'foobar',
  ),
)

Answer 1

$cursor = $collection->find(array('node' => 'group_name'));

参见 http://www.php.net/manual/en/mongo.sqltomongo.php更多例子