How to get value in nested field using Kibana scripted field? - elasticsearch

Question

I'm new to Elastic Stack.
Here, I'm trying to get the value for "pressure" and then convert it to numeric value(string⇒numeric) using Kibana scripted field.
I tried scripted field, but it didn't work for me.
Any idea? I really appreciate your support in advance.
One of my data records is as below.
{
"_index": "production",
"_type": "_doc",
"_id": "4570df7a0d4ec1b0e624e868a5861a0f1a9a7f6c35fdsssafafsa734fb152f4bed",
"_version": 1,
"_score": null,
"_source": {
"factorycode": "AM-NY",
"productcode": "STR",
"lastupdatetime": "2020-05-28T04:16:17.590Z",
"#timestamp": "2020-05-28T04:14:48.000Z",
"massproduction": {
"errorcode": null,
"equipment": "P17470110",
"operatorldap": null,
"machinetime": null,
"quantity": "1",
"externalfilename": null,
"errorcomment": null,
"datas": {
"data": [
{
"value": "45.4",
"id": "001",
"name": "pressure"
},
{
"value": "0.45",
"id": "002",
"name": "current"
}
]
},
"ladderver": null,
"eid": null,
"setupid": null,
"model": "0",
"identificationtagid": null,
"workid": "GD606546sf0B002020040800198",
"reuse": {
"num": "0"
},
"registrydate": "2020-05-28T13:14:48",
"product": "GD604564550B00",
"line": "STRS001",
"judge": "1",
"cycletime": null,
"processcode": "OP335",
"registryutcdate": "2020-04-28T04:14:48",
"name": "massproduction"
}
},
"fields": {
"massproduction.registrydate": [
"2020-05-28T13:14:48.000Z"
],
"#timestamp": [
"2020-05-28T04:14:48.000Z"
],
"lastupdatetime": [
"2020-05-28T04:16:17.590Z"
],
"registrydate": [
"2020-05-28T13:14:48.000Z"
],
"massproduction.registryutcdate": [
"2020-05-28T04:14:48.000Z"
],
"registryutcdate": [
"2020-05-28T04:14:48.000Z"
]
},
"sort": [
158806546548000
]
}
This is my "painless" scripted field in Kibana.
for(item in params._source.massproduction.datas.data)
{
if(item.name=='pressure'){
return item.value;
}
}
return 0;

Answer 1

You can use Float.parseFloat(value) to convert string to float
if(params._source.massproduction!=null && params._source.massproduction.datas!=null &&params._source.massproduction.datas.data.size()>0)
{
def data = params._source.massproduction.datas.data;
if(data instanceof ArrayList)
{
for(item in data)
{
if(item.name=='pressure')
{
return Float.parseFloat(item.value);
}
}
}else
{
if(data.name=='pressure')
{
return Float.parseFloat(data.value);
}
}
}
return 0;