# Ingest Processor for array object data using script
**URL:** https://discuss.elastic.co/t/ingest-processor-for-array-object-data-using-script/379375
**Category:** Elasticsearch
**Tags:** ingest-pipeline
**Created:** [June 20, 2025, 6:46pm UTC](https://discuss.elastic.co/t/ingest-processor-for-array-object-data-using-script/379375 "2025-06-20T18:46:29Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@adude946](https://discuss.elastic.co/u/adude946)
#### Post date: [June 20, 2025, 6:46pm UTC](https://discuss.elastic.co/t/ingest-processor-for-array-object-data-using-script/379375/1 "2025-06-20T18:46:30Z")
Need assist to get the Ingest pipeline processors to work correctly for my sample data. Its an array of objects, trying to create individual objects from each array object using a value data + prefix names based on these values.
**Input**
```auto
{
"color_bag": [{
"val": "g1",
"name": "color_type1",
"attb": {}
},
{
"val": "g2",
"name": "color_type2",
"attb": {}
},
{
"val": "g3",
"name": "color_type3",
"attb": {}
}]
}
```
**Output needed post processing**
```auto
{
"2025_red_g1": {
"val": "g1",
"name": "color_type1",
"attb": {}
},
"2025_green_g2": {
"val": "g2",
"name": "color_type2",
"attb": {}
},
"2025_blue_g3": {
"val": "g3",
"name": "color_type3",
"attb": {}
}
}
```
**Logic in processor**
> - For each object in array color\_bag:
> - if color\_bag.val = 'g1': then object\_prefix = 'red\_'
> - if color\_bag.val = 'g2': then object\_prefix = 'green\_'
> - if color\_bag.val = 'g3': then object\_prefix = 'blue\_'
>
> - Set: object\_name = '2025\_' + object\_prefix + color\_bag.val
> - Create new object as object\_name, in parent root object with full data as in the its array object.
**Sample Mapping**
```auto
{
"mappings": {
"properties": {
"2025_red_g1": {"type": "object", "properties" : {
"val" : {"type": "keyword"},
"name" : {"type": "keyword"},
"attb": {"type": "object", "properties" : {"k": {"type": "keyword"}}}
}},
"2025_green_g2": {"type": "object", "properties" : {
"val" : {"type": "keyword"},
"name" : {"type": "keyword"},
"attb": {"type": "object", "properties" : {"k": {"type": "keyword"}}}
}},
"2025_blue_g3": {"type": "object", "properties" : {
"val" : {"type": "keyword"},
"name" : {"type": "keyword"},
"attb": {"type": "object", "properties" : {"k": {"type": "keyword"}}}
}}
}
}
}
```
I have a half baked script which i know is wrong as it keeps erroring. Cannot get this coded correctly.
```auto
{
"processors": [
{
"foreach": {
"field": "color_bag",
"processor": {
"script": {
"source": """
def prefix = "2025_";
if (ctx._ingest._value.val = 'g1') {
temp_name = 'red_';
}
if (ctx._ingest._value.val = 'g2') {
temp_name = 'green_';
}
if (ctx._ingest._value.val = 'g3') {
temp_name = 'blue_';
}
def object_prefix = prefix + temp_name + ctx._ingest._value.val;
ctx[object_prefix] = ctx._ingest._value;
"""
}
}
}
}
]
}
```
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [June 20, 2025, 6:52pm UTC](https://discuss.elastic.co/t/ingest-processor-for-array-object-data-using-script/379375/2 "2025-06-20T18:52:37Z")
That type of dynamic naming of fields can result in excessive number of mapped fields, aka mapping explosion, and is generally a quite bad idea. I would recommend not syructuring your data that way as it is likely to cause problems unless the number of permutations is quite limited.
---
### Author:  [@adude946](https://discuss.elastic.co/u/adude946)
#### Post date: [June 20, 2025, 7:14pm UTC](https://discuss.elastic.co/t/ingest-processor-for-array-object-data-using-script/379375/3 "2025-06-20T19:14:23Z")
In total there are up to 8 permutations only as the max.