发布于 2015-09-14 15:05:57 | 183 次阅读 | 评论: 0 | 来源: 网络整理
The geoSearch command provides an interface to MongoDB’s haystack index functionality. These indexes are useful for returning results based on location coordinates after collecting results based on some other query (i.e. a “haystack.”) Consider the following example:
{ geoSearch : "places", near : [33, 33], maxDistance : 6, search : { type : "restaurant" }, limit : 30 }
The above command returns all documents with a type of restaurant having a maximum distance of 6 units from the coordinates [30,33] in the collection places up to a maximum of 30 results.
Unless specified otherwise, the geoSearch command limits results to 50 documents.