Elasticsearch - get docs with array field size greater than 1 - elasticsearch

Question

I want to get all docs with a field, which is an array, with size greater than 1.
I'm using the following command:
curl -H "Content-Type: application/json" -XGET '127.0.0.1:9200/poly/_search?pretty' -d '
{ "query": { "bool": { "filter": { "script" : { "script" : "doc['emoji'].length > 1" } } } } }
'
but I get the following error:
{
"error" : {
"root_cause" : [
{
"type" : "script_exception",
"reason" : "compile error",
"script_stack" : [
"doc[emoji].length > 1",
" ^---- HERE"
],
"script" : "doc[emoji].length > 1",
"lang" : "painless",
"position" : {
"offset" : 4,
"start" : 0,
"end" : 21
}
}
],
"type" : "search_phase_execution_exception",
"reason" : "all shards failed",
"phase" : "query",
"grouped" : true,
"failed_shards" : [
{
"shard" : 0,
"index" : "poly",
"node" : "Dnp4BI4YSgCz-C-p8NmcTg",
"reason" : {
"type" : "query_shard_exception",
"reason" : "failed to create query: compile error",
"index_uuid" : "HlWRuJb5TY-L_2_9iyuVmg",
"index" : "poly",
"caused_by" : {
"type" : "script_exception",
"reason" : "compile error",
"script_stack" : [
"doc[emoji].length > 1",
" ^---- HERE"
],
"script" : "doc[emoji].length > 1",
"lang" : "painless",
"position" : {
"offset" : 4,
"start" : 0,
"end" : 21
},
"caused_by" : {
"type" : "illegal_argument_exception",
"reason" : "cannot resolve symbol [emoji]"
}
}
}
}
],
"caused_by" : {
"type" : "script_exception",
"reason" : "compile error",
"script_stack" : [
"doc[emoji].length > 1",
" ^---- HERE"
],
"script" : "doc[emoji].length > 1",
"lang" : "painless",
"position" : {
"offset" : 4,
"start" : 0,
"end" : 21
},
"caused_by" : {
"type" : "illegal_argument_exception",
"reason" : "cannot resolve symbol [emoji]"
}
}
},
"status" : 400
}
Nevertheless, the field "emoji" exists in my ElasticSearch docs, as you can see in the result to the following command:
curl -H "Content-Type: application/json" -XGET '127.0.0.1:9200/poly/_search?pretty' -d '
{
"_source": ["emoji"],
"query" : {
"constant_score" : {
"filter" : {
"exists" : {
"field" : "emoji"
}
}
}
}
}
'
Here is the result for the previous command:
"took" : 28,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 10000,
"relation" : "gte"
},
"max_score" : 1.0,
"hits" : [
{
"_index" : "poly",
"_type" : "_doc",
"_id" : "1307256887860174848",
"_score" : 1.0,
"_source" : {
"emoji" : [
"❤️"
]
}
},
{
"_index" : "poly",
"_type" : "_doc",
"_id" : "1278766523134414848",
"_score" : 1.0,
"_source" : {
"emoji" : [
"⏩"
]
}
},
{
"_index" : "poly",
"_type" : "_doc",
"_id" : "1298632385605431296",
"_score" : 1.0,
"_source" : {
"emoji" : [
"\uD83D\uDC47\uD83C\uDFFF",
"\uD83D\uDC47\uD83C\uDFFF",
"\uD83D\uDC47\uD83C\uDFFF",
"\uD83D\uDC47\uD83C\uDFFF"
]
}
},
{
"_index" : "poly",
"_type" : "_doc",
"_id" : "1300563120184651776",
"_score" : 1.0,
"_source" : {
"emoji" : [
"\uD83D\uDC4D",
"\uD83D\uDE00",
"\uD83D\uDE80"
]
}
},
]
}
}
Can someone tell me why I'm getting that error above?

Answer 1

You need to skip characters in your command check command below:
Script:
"script": {"script": "doc['\''emoji'\''].length > 1"
Command:
curl -H "Content-Type: application/json" -XGET '127.0.0.1:9200/poly/_search?pretty' -d '{ "query": {"bool": {"filter": {"script": {"script": "doc['\''emoji'\''].length > 1"}}}}}'