There’s something similar in Jira for JSON-to-JSON conversions: https://issues.apache.org/jira/browse/NIFI-361
If that were implemented, you could hook an Attributes to JSON up to it and specify the transformation to un-flatten it. From: Jeroen Jacobs <[email protected]> Reply-To: <[email protected]> Date: Monday, February 1, 2016 at 6:47 PM To: "[email protected]" <[email protected]> Subject: Re: Nesting and AttributesToJSON Maybe a possible suggestion to map attributes to JSON: Can you add a property "JSONMapping" or something, where you can use JSON Path expressions to map FlowFile attributes to JSON attributes? It's just an idea... Jeroen. From: Jeroen Jacobs <[email protected]> Sent: Tuesday, February 2, 2016 12:40 AM To: [email protected] Subject: Re: Nesting and AttributesToJSON Hi, To be honest, I have no idea. Is there any other way I can accomplish this task? I was also looking for a workaround that allows me to set the content of the flowfile using expression language. Maybe something like this: { "card" : { "style" = "${card.style}" "url" = "${card.url}" } } But I can't seem to find a processor that allows this either. Quite frustrating, as it seems I need to ditch NiFi as a possible solution for my problem, and need to resort to custom scripting again. Jeroen. From: Jeremy Dyer <[email protected]> Sent: Tuesday, February 2, 2016 12:14 AM To: [email protected] Subject: Re: Nesting and AttributesToJSON Jeroen, AttributesToJSON currently does not support nested JSON and instead maps everything to a flat JSON object. The problem is a lot of NiFi attributes used the "something.else" syntax and it would be hard to determine what delimiter should indicate a nested JSON element. Right now you are going to get the result ... { "card.style" = url "card.url" = http://mysite.com } Knowing about the "." limitation do you have ideas about how you would like to see this nesting occur? Thanks, Jeremy Dyer On Mon, Feb 1, 2016 at 5:57 PM, Jeroen Jacobs <[email protected]> wrote: Hi, A very simple question: How do I need to arrange my attributes to get the following JSON file: { "card": { "style" : "url" "url": "http://mysite.com"; } } I tried it by creating two attributes: card.style = url card.url = http://mysite.com But no matter how I try to use AttributesToJSON, I don't get the desired result. I tried to pass "card" and "card.*" as arguments to Attributes List, but they don't have the desired result. And I don't like to repeat myself, but the documentation doesn't mention it either... Kind regards, Jeroen
