Problems with maps in elasticsearch scripts Map parameters - elasticsearch

Question

I cannot find a way to pass Map as a named script parameter. Groovy-style "[1:0.2,3:0.4]" and json-style {1:0.2, 3:0.4} result in syntax error. Examples:
GET tt/clip/_search
{
"query": {
"function_score": {
"script_score": {
"script": {
"lang": "painless",
"source": "return 0",
"params": {
"full_text_tfidf": [1:0.2,3:0.4]
}
}
}
}
}
}
{
"error": {
"root_cause": [
{
"type": "parsing_exception",
"reason": "[script] failed to parse field [params]",
"line": 9,
"col": 35
}
],
"type": "parsing_exception",
"reason": "[script] failed to parse field [params]",
"line": 9,
"col": 35,
"caused_by": {
"type": "json_parse_exception",
"reason": "Unexpected character (':' (code 58)): was expecting comma to separate Array entries\n at [Source: org.elasticsearch.transport.netty4.ByteBufStreamInput#75a6a7c1; line: 9, column: 37]"
}
},
"status": 400
}
GET tt/clip/_search
{
"query": {
"function_score": {
"script_score": {
"script": {
"lang": "painless",
"source": "return 0",
"params": {
"full_text_tfidf": {1:0.2,3:0.4}
}
}
}
}
}
}
{
"error": {
"root_cause": [
{
"type": "parsing_exception",
"reason": "[script] failed to parse field [params]",
"line": 9,
"col": 34
}
],
"type": "parsing_exception",
"reason": "[script] failed to parse field [params]",
"line": 9,
"col": 34,
"caused_by": {
"type": "json_parse_exception",
"reason": "Unexpected character ('1' (code 49)): was expecting double-quote to start field name\n at [Source: org.elasticsearch.transport.netty4.ByteBufStreamInput#6ed9faa9; line: 9, column: 36]"
}
},
"status": 400
}
On the other hand, I cannot say that params know to work only with primitive types. Nested arrays are accepted successfully. Is it possible to pass maps as parameters?

Answer 1

The correct way to specify a map in the parameters is simply by using a JSON hash (you're missing the double quotes around the keys):
GET tt/clip/_search
{
"query": {
"function_score": {
"script_score": {
"script": {
"lang": "painless",
"source": "return 0",
"params": {
"full_text_tfidf": {
"1": 0.2,
"3" :0.4
}
}
}
}
}
}
}