Mule 4 - Replace a JSON value in JSON Array with Dataweave 2

Question

In my Mule 4 flow I get a JSON Array similar to the following:

 [
     {
         "type": "error",
         "status": 404,
         "code": "not_found",
         "message": "Could not find the resource",
     },
     {
         "type": "error",
         "status": 401,
         "code": "",
         "message": "Could not find the specified ",
     }
 ]

I want to change the value of the message field to a vars.germanMessage variable for each JSON object.

I've tried to modify it with Dataweave 2 this way:

%dw 2.0
output application/java
 ---
(payload as Array) map {

    "message": vars.germanMessage

}

But this returns a new JSON message with only the message field.

The input type is Array<Object> and output type too.

Is there any way to replace the value without changing the rest of the message?

machaval · Accepted Answer · 2019-04-06 13:03:40Z

4

Yes just use mapObject

payload mapObject (value,key) -> {
    (key): if((key as String) == "message")) vars.germanMessage else value
}

answered Apr 6, 2019 at 13:03

machaval

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1 Comment

gtx911 Over a year ago

Thanks @machaval, but the source payload is an Array<Object> like the output payload so, What map type should I use instead of mapObject?

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