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讓Mongodb聚合工作起來有點困難。它不斷給我空。請幫忙。以下是用php編寫的代碼。謝謝。MongoDB不斷給我null
我想要做的就是總結值的2場,請求和響應,2個特定日期
try {
$mongodb = new MongoClient("mongodb://ad:[email protected]");
$database = $mongodb->selectDB('backend');
$collection = new MongoCollection($database, 'RequestSummary');
$pipeline = array(
array(
'$group' => array(
'_id' => array(
'request' => array('$sum' => '$Requests'),
'response' => array('$sum' => '$Responses')
)
)
),
array(
'$match' => array(
'RequestDate' => array(
'$gte' => intval($_SESSION['range_from']),
'$lte' => intval($_SESSION['range_to'])
)
)
)
);
$collection->aggregate($pipeline);
var_dump($g);
} catch (MongoConnectionException $exc) {
echo $exc->getTraceAsString();
}