How to projection in $geoNear aggregate method - mongodb

Question

db.places.aggregate([
{
$geoNear: {
near: { type: "Point", coordinates: [ -73.99279 , 40.719296 ] },
distanceField: "dist.calculated",
maxDistance: 2,
query: { type: "public" },
includeLocs: "dist.location",
num: 5,
spherical: true
}
}
])
I am Using aggregate method in mongodb.and this is working for me but I need projection on the document for only return some field to show. So how can I achieve projection in this method

Answer 1

Even OP's problem is solved in the comments I decided to add an detailed answer as it will help some one else.
As #hecnabae said you have to append $project stage to your query to retrieve data.
Here is an example:
db.getCollection("places").aggregate(
[
{
"$geoNear": {
"near": { "type": "Point", "coordinates": [ -73.99279 , 40.719296 ] },
"distanceField: "dist.calculated",
"maxDistance": 2,
"query": { "type": "public" },
"includeLocs": "dist.location",
"num": 5,
"spherical": true
}
},
{
"$project" : {
"Name" : 1.0,
"Distance" : "$dist.calculated",
"Location": "$dist.location"
}
}
],
{
"allowDiskUse" : false
}
);
This will return you an list of data as follows:
{
"_id" : ObjectId("5e3207128cbfe302dcbb1234"),
"Name" : "Your Place Name",
"Distance" : 17.98627020911569,
"Location" : [
58.1230154,
23.1232555
]
}