我的mongodb中有超过10000条记录。现在我不想使用php处理代码，因此我在laravel 5中创建了以下查询，它在mongodb中执行所有处理并非常快速地生成结果。 查询如下：
$result = Role::raw(function ($collection){
return $collection->aggregate(array(
array( '$match' => array( "PanelID" => "A00898" ) ),
array( '$project' => array( 'EventTS' => 1, 'MainsPower' => 1, '_id' => 0 ) ),
array(
'$unwind' => array(
'path' => '$MainsPower',
'includeArrayIndex' => "arrayIndex",
'preserveNullAndEmptyArrays' => true
)
),
array(
'$project' => array(
'MainsPower' => 1,
'timestamp' => array(
'$add' => array(
'$EventTS',
array( '$multiply' => array( 60000, '$arrayIndex' ) )
)
)
)
)
));
})->toArray();
以上查询以下列方式生成结果
Array
(
[0] => Array
(
[MainsPower] => 255
[timestamp] => MongoDB\BSON\UTCDateTime Object
(
[milliseconds] => 1448911800000
)
)
[1] => Array
(
[MainsPower] => 0
[timestamp] => MongoDB\BSON\UTCDateTime Object
(
[milliseconds] => 1448911860000
)
)
[2] => Array
(
[MainsPower] => 0
[timestamp] => MongoDB\BSON\UTCDateTime Object
(
[milliseconds] => 1448911920000
)
)
}
但我希望以下列方式回复
Array
(
[0] => Array
(
[MainsPower] => 255
[timestamp] => 2015-10-07T14:28:41.545Z
)
[1] => Array
(
[MainsPower] => 0
[timestamp] => 2015-10-15T14:28:41.545Z
)
)
[2] => Array
(
[MainsPower] => 0
[timestamp] => 2015-11-07T14:28:41.545Z
)
}
我尝试了许多解决方案并在laravel中使用以转换日期格式，但它会出现以下错误
MongoDB\BSON\UTCDateTime not found