Elasticsearch mapping boolean with value "0" and "1" - elasticsearch

Question

ElasticSearch version 7.13
Index already exist and I want to reindex with mapping, the field is a boolean. But when I'm trying to reindex, the field has "1" and "0" (string).
How can I evaluate if field = "1" set true (same for 0, but false)?
I have read about runtime, but can't figure out how does it work.
my mapping
{
mappings:{
"OPTIONS": {
"type": "nested",
"properties":{
"COMBINABLE": {
"type": "boolean"
}
}
}
}
}
and document
{
"options": [
{
"COMBINABLE": "0"
}
]
}

Answer 1

You might consider using pipeline ingestion to convert your number to a boolean value, you can do something like this:
POST _ingest/pipeline/_simulate
{
"pipeline": {
"description": "convert to boolean",
"processors": [
{
"script": {
"source": "def options = ctx.options;def pairs = new ArrayList();for (def pair : options) {def k = false;if (pair[\"COMBINABLE\"] == \"1\" || pair[\"COMBINABLE\"] == 1) {k = true;}pair[\"COMBINABLE\"] = k;}ctx.options = options;"
}
}
]
},
"docs": [
{
"_source": {
"options": [
{
"COMBINABLE": 1
}
]
}
}
]
}
The painless script above is pretty simple:
def options = ctx.options;
def pairs = new ArrayList();
for (def pair : options) {
def k = false;
if (pair["COMBINABLE"] == "1" || pair["COMBINABLE"] == 1) {
k = true;
}
pair["COMBINABLE"] = k;
}
ctx.options = options;
It simply loop through all your option under options, then if the COMBINABLE is 1 or "1", it will convert to true, otherwise, it will be false. You can set the pipeline as your default ingestion, see here