mongodb geonear

Question

使用db.runCommand({geoNear : “collectionName” , near : [120.123456,30.654321], num : 10 })查询之前我需要准备什么样子的集合collection ？collection相应的字段和索引？？？

Answer 1

Collection needs to add coordinate information in GeoJson format, for example:

{ type: "Point", coordinates: [ 40, 5 ] }

You also need to build a 2dsphere type index, for example:

db.collection.createIndex( { <location field> : "2dsphere" } )

For more details, please see mongodb’s documentation:
https://docs.mongodb.org/manual/core/2dsphere/