基于MongoDB ODM的地理空间查询

Question

db.adverts.find({coordinates:{$near:[20,40]}})

{ "_id" : ObjectId("4fddac51352de93903000000"), "title" : "dummy #3", "coordinates" : { "longitude" : 22, "latitude" : 31 } }
{ "_id" : ObjectId("4fddac48352de95105000000"), "title" : "dummy #3", "coordinates" : { "longitude" : 20, "latitude" : 30 } }
{ "_id" : ObjectId("4fddaca4352de93703000000"), "title" : "dummy #3", "coordinates" : { "longitude" : 31, "latitude" : 22 } }
{ "_id" : ObjectId("4fdda6a2352de90a03000000"), "title" : "dummy title", "created" : ISODate("2012-06-17T09:42:58Z"), "coordinates" : { "longitude" : 54.1234, "latitude" : -1.234 } }
{ "_id" : ObjectId("4fdda6d8352de9c004000000"), "title" : "dummy title #2", "created" : ISODate("2012-06-17T09:43:52Z"), "coordinates" : { "longitude" : 54.34, "latitude" : -1.124 } }

$adverts = $dm->createQueryBuilder('Advert')
                      ->field('coordinates')->near(20, 40)
                      ->getQuery()
                      ->execute();
$adverts->count(); // => 0

Advert:
    type: document
    collection: adverts
    fields:
        id:
            id: true
        title:
            type: string
        content:
            type: string
        created:
            type: date
        updated:
            type: date
        status:
            type: int
        distance:
            type: int

    indexes:
        coordinates:
            keys:
                coordinates: 2d

    referenceOne:
        owner:
            targetDocument: User

    embedOne:
        coordinates:
            targetDocument: Coordinates

Coordinates:
    type: embeddedDocument
    fields:
        longitude:
            type: float
        latitude:
            type: float

有没有想过为什么使用Dociety的ODM会在同一个查询上返回零结果？

更新#1看起来教义\MongoDB\Query\Builder::near()L363有问题。方法参数忽略第二个值($Y)。因此只传递要执行的第一个值。

Answer 1

near()方法似乎存在一个实现问题（请参见https://github.com/stoculine/mongodb/pull/53)。要修复我的原始查询,我需要执行以下操作；

$adverts = $dm->createQueryBuilder('Advert')
              ->field('coordinates.latitude')->near(20)
              ->field('coordinates.longitude')->near(40);

$adverts->getQuery()->count(); // => 5

这与当前的文档相矛盾，该文档暗示x、y坐标都可以传递给Doctine\MongoDB\Query\Builder::near（）。

编辑

public function near($longitude, $latitude)
{
    $query = $this->createQueryBuilder()
                  ->field('coordinates.longitude')->near((float) $longitude)
                  ->field('coordinates.latitude')->near((float) $latitude)
                  ->getQuery();

    return $query;
}