sorting - Sum field and sort on Solr -


i'm implementing grouped search in solr. i'm looking way of summing 1 field , sort results sum. following data example hope clearer.

{    [      {        "id" : 1,        "parent_id" : 22,        "valuetobesummed": 3      },      {        "id" : 2,        "parent_id" : 22,        "valuetobesummed": 1      },      {        "id" : 3,        "parent_id" : 33,        "valuetobesummed": 1      },      {        "id" : 4,        "parent_id" : 5,        "valuetobesummed": 21      }    ]  }

if search made on data i'd obtain

{    [      {        "numfound": 1,        "summedvalue" : 21,        "parent_id" : 5      },      {        "numfound": 2,        "summedvalue" : 4,        "parent_id" : 22      },      {        "numfound": 1,        "summedvalue" : 1,        "parent_id" : 33      }    ]  }

do have advice on ?

solr 5.1+ (and 5.3) introduces solr facet functions solve exact issue.

from yonik's introduction of feature:

$ curl http://localhost:8983/solr/query -d 'q=*:*&  json.facet={    categories:{      type : terms,      field : cat,      sort : "x desc",   // can use sort:{x:desc}      facet:{        x : "avg(price)",        y : "sum(price)"      }    }  } '

so suggestion upgrade newest version of solr (the recent version 5.2.1, advised of syntax that's on above link landed in 5.3 - current release target).


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