MongoDB在PHP中使用$ and $ or和$ nearSphere查找查詢

Question

經過大量的嘗試和網絡研究之后，我對該查詢發了瘋。 我想在MongoDB上的php中圍繞一個地理點（最大距離為500米）構建“俱樂部”查詢。 但是，當我運行查詢時，它忽略了距離限制，並顯示了數據庫中所有按距離排序的球桿。

這是我的數據集（2dsphere索引geoLoc）：

{"_id":ObjectId("547c649e30afe32c23000048"),"name":"Club Ritzz","category":"Club","category_list":[{"id":"191478144212980","name":"Night Club"}],"location":{"city":"Mannheim"},"geoLoc":{"type":"Point","coordinates":[8.473665839156,49.484065272756]}}
{"_id":ObjectId("547c649f30afe32c2300004a"),"name":"Das Zimmer Mannheim","category":"Club","category_list":[{"id":"191478144212980","name":"Night Club"}],"geoLoc":{"type":"Point","coordinates":[8.4709362941178,49.487260552592]}}
{"_id":ObjectId("547c64ab30afe32c23000063"),"name":"Nationaltheater Mannheim","category":"Arts/entertainment/nightlife","category_list":[{"id":"173883042668223","name":"Theatre"}],"geoLoc":{"type":"Point","coordinates":[8.4776534992592,49.48782606969]}}
{"_id":ObjectId("547c64a130afe32c2300004f"),"name":"SOHO Bar Club Lounge","category":"Club","category_list":[{"id":"191478144212980","name":"Night Club"},{"id":"164049010316507","name":"Gastropub"}],"geoLoc":{"type":"Point","coordinates":[8.4630844501277,49.49385193591]}}
{"_id":ObjectId("547c64a730afe32c2300005a"),"name":"Loft Club","category":"Club","category_list":[{"id":"191478144212980","name":"Night Club"},{"id":"176139629103647","name":"Dance Club"}],"geoLoc":{"type":"Point","coordinates":[8.4296300196465,49.484211928258]}}

這是我的php代碼（12月2日更新）：

$qry = $pub->find(  
  array( '$and' => 
    array(
      array( 'geoLoc' => 
        array('$nearSphere' =>
          array('$geometry' => 
            array('type'=>'Point',
              'coordinates'=>
              array(
                floatval($sLon), floatval($sLat)
              )
            ),
            'maxDistance' => 500
          )
        )
      ),
      array( '$or' =>
        array(
          array( 'name' => new MongoRegex("/.*club/i")),
          array( 'name' => new MongoRegex("/.*zimm/i"))
        )
      ),
      array('$or' => 
        array(
          array('category_list.name' => 'Night Club'), 
          array('category_list.name' => 'Dance Club'), 
          array('category' => 'Club')
        )
      )
    )
  ),
  array('id' => 1, 'name' => 1, '_id' => 0)
);

有人知道為什么結果不限於指定的maxDistance嗎？

Answer 1

我在StackOverflow上發現了類似的問題，該問題概述了必須對maxDistance參數使用弧度。

參見https://dba.stackexchange.com/questions/23869/nearsphere-returns-too-many-data-what-am-i-missing-am-i-wrong-is-it-a-bug-d

如果您不先使用PHP API就在mongo shell中測試查詢，那可能也會很有幫助（只是查看查詢是否正常運行，並在查詢后附加'.explain（）'即可查看DB內部通常發生的情況）。