elasticsearch:use script to update nested field?

Question

I want to add a object into the nested field every update time.

For example,I have a doc:

{
    \"test\":[{\"remark\":\"remark1\"}]
}


        

Answer 1

I suggest to try a script like this, which takes two parameters in argument. It will check if any of the nested objects already contains the given id:

• if yes, it will update the given remark
• if not, it will insert a new nested object in the test array.

The script goes like this:

def updated = false
ctx._source.test?.each { obj -> 
    if (obj.id == item.id) { 
        obj.remark = item.remark
        updated = true
    } 
}
if (!updated) {
    ctx._source.test = ((ctx._source.test ?: []) + item)
}

After being inlined and with proper semicolons, the script looks like this:

{
    "script": "def updated = false; ctx._source.test?.each { obj -> if (obj.id == item.id) { obj.remark = item.remark; updated = true } }; if (!updated) { ctx._source.test = ((ctx._source.test ?: []) + item)}",
    "params": {
        "item": {
            "remark": "affffd",
            "id": "1"
        }
    }
}