Ingest Pipeline: drop processor: compile error

[asc-adean]

As documented here
https://www.elastic.co/guide/en/elasticsearch/reference/current/drop-processor.html

I want to be able to drop a document when matching on a field, like so

    {
      "processors": [
    {
      "json": {
        "field": "message",
        "add_to_root": true,
        "ignore_failure": true
      }
    },
    {
      "drop": {
        "if": "req.url == '/api/v1/health'",
        "ignore_failure": true
      }
    }
      ]
    }

But I am getting a compile error in the ingest ui. The browser dev tool inspector gives me this reason why:

400 Bad Request

type: illegal_argument_exception
reason: cannot resolve symbol [req.url]

I can provide additional screenshots if needed.

[flash1293 (Joe Reuter)]

Can you share an example document?

If the field is called req.url, I think it has to be referenced by ctx.req.url in the condition.

[asc-adean]

Hi,

Thanks for that tip, it did accept the ctx. prefix to the field, I'll check on how it works. Appreciate it

[flash1293 (Joe Reuter)]

Think of the if as a mini script - "ctx" is the variable containing the current document. ctx.req.url is looking up the value for the object.

It's similar to this: https://www.elastic.co/guide/en/elasticsearch/painless/current/painless-ingest-processor-context.html