issue with amazon cloudsearch search with location - amazon

Question

my problem is amazon cloudSearch with location ..
when i use rank expression for search product with location found this error
["info"]=>
object(stdClass)#16 (4) {
["rid"]=>
string(80) "ee6c7090a20a654dbfd52a5f2ce0eeb96e766f609a8889bc1af02ab95e4065a6ce8ed690aa624373"
["time-ms"]=>
int(4)
["cpu-time-ms"]=>
int(0)
["messages"]=>
array(2) {
[0]=>
object(stdClass)#17 (3) {
["severity"]=>
string(7) "warning"
["code"]=>
string(27) "CS-RankExpressionParseError"
["message"]=>
string(328) "Could not parse rank expression (rank-geo=Math.sqrt(Math.pow(Math.abs(22345345-534534),2) Math.pow(Math.abs(934593495-34534534),2))): The ANTLR parser returned: -memory-(1) : error 10 : Missing token, at offset 47
near [Index: 0 (Start: 0-Stop: 0) ='', type<7> Line: 1 LinePos:47]
: Missing RPAREN
"
}
[1]=>
object(stdClass)#18 (3) {
["severity"]=>
string(7) "warning"
["code"]=>
string(41) "CS-InvalidFieldOrRankAliasInRankParameter"
["message"]=>
string(47) "Unable to create score object for rank 'bineet'"
}
}
}
while my search request url is
htp://www.search_endpoint."/search?bq=".urlencode($term)."&rank=geo&rank-geo=Math.sqrt(Math.pow(Math.abs(22345345 - 534534),2)+Math.pow(Math.abs(934593495 - 34534534),2))&size=$size&start=$start&return-fields=".implode(',',$return_fields
where i am doing wrong ?
without rank expression it is working fine .
i think error is in define expression for location but could not found any other solution
Please help me.
Thanks

Answer 1

I found solution for this by using
&rank-geo=urlencode('Math.sqrt(Math.pow(Math.abs(22345345 - doc.latitude),2)+Math.pow(Math.abs(934593495 - doc.longitude),2))')
this is rank-expression example
you can use custom rank expression in amazon cloud-search with two way
Make a new rank expression in amazon cloud-search console admin panel and define expression
ie mathematical expression and in search url simply append that rank expression name only like bellow
&rank=geo // geo rank expression should be define on cloud-search console admin panel
Second way is include rank name and expession in dynamic way like that in search url
&rank=distancesearch&rank-distancesearch=urlencode('Math.sqrt(Math.pow(Math.abs(22345345 - doc.latitude),2)+Math.pow(Math.abs(934593495 - doc.longitude),2))')
in this way no need to make a rank expression on amazon cloudSearch console admin panel