elasticsearch_dsl search by geo location distance and get results and distance

Question

I have an index the holds location data for stores.

When using python's elasticsearch_dsl I'd like to find the nearest stores for a given location, sorted by distance. Since ES already calculates the distance, is it possible to get it as a part of the search result?

Can it be achieved using elasticsearch_dsl in a single query? Or do I have to do post processing on the location lat,lon and calculate the distances manually?

Thanks.

Answer 1

You can sort by distance and you'd get the computed distance in the resulting hits.

For instance:

s = Search().sort(
    {
        "_geo_distance" : {
            "location" : {"lat": 40, "lon": -70},
            "order" : "asc",
            "unit" : "km",
            "distance_type" : "arc"
        }
    }
)