Why can't I pass index field value into painless script? - elasticsearch-painless

Question

Here's my index:
PUT my-index-000001/_doc/1
{
"virtual": "/testss/3-1.pdf",
"file": "3-1",
"caseno": "testss"
}
I am trying to pass the file value "3-1" into the following script and then conditionally either return the value or divide it by 100:
GET my-index-000001/_search
{
"script_fields": {
"mynewfield": {
"script": {
"source":"""
List i=Arrays.asList(doc['file'].value.splitOnToken("-"));
if (i.length==1){
return Float.parseFloat(i[0]);
}
if (i.length==2){
return Float.parseFloat(i[0])+Float.parseFloat(i[1])/100;
}
"""
}
}
}
}
And Getting following errors:
{
"error" : {
"root_cause" : [
{
"type" : "script_exception",
"reason" : "runtime error",
"script_stack" : [
"org.elasticsearch.index.mapper.TextFieldMapper$TextFieldType.fielddataBuilder(TextFieldMapper.java:757)",
"org.elasticsearch.index.fielddata.IndexFieldDataService.getForField(IndexFieldDataService.java:116)",
"org.elasticsearch.index.query.QueryShardContext.lambda$lookup$0(QueryShardContext.java:330)",
"org.elasticsearch.search.lookup.LeafDocLookup$1.run(LeafDocLookup.java:97)",
"org.elasticsearch.search.lookup.LeafDocLookup$1.run(LeafDocLookup.java:94)",
"java.base/java.security.AccessController.doPrivileged(AccessController.java:312)",
"org.elasticsearch.search.lookup.LeafDocLookup.get(LeafDocLookup.java:94)",
"org.elasticsearch.search.lookup.LeafDocLookup.get(LeafDocLookup.java:41)",
"i=Arrays.asList(doc['file'].value.splitOnToken(\"-\"));\n ",
" ^---- HERE"
],
"script" : "\n \n List i=Arrays.asList(doc['file'].value.splitOnToken(\"-\"));\n if (i.length==1){\n return Float.parseFloat(i[0]);\n }\n if (i.length==2){\n return Float.parseFloat(i[0])+Float.parseFloat(i[1])/100;\n }\n \n \n ",
"lang" : "painless",
"position" : {
"offset" : 39,
"start" : 19,
"end" : 78
}
}
],
"type" : "search_phase_execution_exception",
"reason" : "all shards failed",
"phase" : "query",
"grouped" : true,
"failed_shards" : [
{
"shard" : 0,
"index" : "my-index-000001",
"node" : "wJdb2G1VQCyaDNduQLS4SQ",
"reason" : {
"type" : "script_exception",
"reason" : "runtime error",
"script_stack" : [
"org.elasticsearch.index.mapper.TextFieldMapper$TextFieldType.fielddataBuilder(TextFieldMapper.java:757)",
"org.elasticsearch.index.fielddata.IndexFieldDataService.getForField(IndexFieldDataService.java:116)",
"org.elasticsearch.index.query.QueryShardContext.lambda$lookup$0(QueryShardContext.java:330)",
"org.elasticsearch.search.lookup.LeafDocLookup$1.run(LeafDocLookup.java:97)",
"org.elasticsearch.search.lookup.LeafDocLookup$1.run(LeafDocLookup.java:94)",
"java.base/java.security.AccessController.doPrivileged(AccessController.java:312)",
"org.elasticsearch.search.lookup.LeafDocLookup.get(LeafDocLookup.java:94)",
"org.elasticsearch.search.lookup.LeafDocLookup.get(LeafDocLookup.java:41)",
"i=Arrays.asList(doc['file'].value.splitOnToken(\"-\"));\n ",
" ^---- HERE"
],
"script" : "\n \n List i=Arrays.asList(doc['file'].value.splitOnToken(\"-\"));\n if (i.length==1){\n return Float.parseFloat(i[0]);\n }\n if (i.length==2){\n return Float.parseFloat(i[0])+Float.parseFloat(i[1])/100;\n }\n \n \n ",
"lang" : "painless",
"position" : {
"offset" : 39,
"start" : 19,
"end" : 78
},
"caused_by" : {
"type" : "illegal_argument_exception",
"reason" : "Text fields are not optimised for operations that require per-document field data like aggregations and sorting, so these operations are disabled by default. Please use a keyword field instead. Alternatively, set fielddata=true on [file] in order to load field data by uninverting the inverted index. Note that this can use significant memory."
}
}
}
]
},
"status" : 400
}
What should I do differently here?
I tried referencing File: "3-1" with doc['file'].value in the script...doesnt seem to be working.

Answer 1

This ended up working for me:
POST my-index-000001/_update_by_query/ { "script": {
"lang": "painless",
"source": "ctx._source.caseno=Arrays.asList(ctx._source.virtual.splitOnToken('/'))[1];ctx._source.file=Arrays.asList(Arrays.asList(ctx._source.virtual.splitOnToken('/'))[2].splitOnToken('.'))[0];List
i=Arrays.asList(Arrays.asList(Arrays.asList(ctx._source.virtual.splitOnToken('/'))[2].splitOnToken('.'))[0].splitOnToken('-'));if
(i.length==1){ctx._source.mynewfield=Float.parseFloat(i[0]);}if
(i.length==2){ctx._source.mynewfield=Float.parseFloat(i[0])+Float.parseFloat(i[1])/100}"
} }