node.js - MongoDB - removing duplicate documents (GeoJSON) -


i know best method removing duplicate documents large geojson collection (approx 80k lines) have stored in mongodb. believe duplicates causing error on front end cannot log full collection console.

i have tried use dropdups method in mongo shell explained in following url have had no success.. mongodb query remove duplicate documents collection . believe dropdups depreciated of mongodb 2.6

here sample of schema structure:

{   "type": "featurecollection",      "features": [         {             "geometry": {               "type": "point","coordinates": [-73.994720, 40.686902]            }         },         {             "geometry": {               "type": "point","coordinates": [-73.994720, 40.686902]            }         },         {             "geometry": {               "type": "point","coordinates": [-73.989205, 40.686675]            }         },         {             "geometry": {               "type": "point","coordinates": [-73.994655, 40.687391]                           }         },         {            "geometry": {               "type": "point","coordinates": [-73.985557, 40.687683]                           }         },         {             "geometry": {               "type": "point","coordinates": [-73.985557, 40.687683]            }         },         {            "geometry": {               "type": "point","coordinates": [-73.984656, 40.685462]            }         },          ] }

here create index attempts in mongo shell, , duplicates still remain!

> db.testschema.createindex( { coordinates: 1 }, { unique: true, dropdups: true } ) { "createdcollectionautomatically" : false, "numindexesbefore" : 1, "numindexesafter" : 2, "ok" : 1 } > db.testschema.createindex( { geometry: 1 }, { unique: true, dropdups: true      } ) { "createdcollectionautomatically" : false, "numindexesbefore" : 2, "numindexesafter" : 3, "ok" : 1 } > db.testschema.ensureindex({'testschema.features.geometry.coordinates': 1}, {unique: true, dropdups: true}) { "createdcollectionautomatically" : false, "numindexesbefore" : 3, "numindexesafter" : 4, "ok" : 1 }


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