Mule Dev Tricks: Create An Array List From JSON Using DataWeave

Input

[
 {
  "id" : "11111",
  "name" : "AAAAA"
 },
 {
  "id" : "22222",
  "name": "BBBBB"
 },
 {
  "id" : "33333",
  "name" : "CCCCC"
 }
] 

Output

["11111", "22222", "33333"]

As you can see, we only want to extract the id from the input.

DataWeave Script

%dw 1.0
%output application/java
---
payload map (data) -> data.id

The map function from the Dataweave component is the mostly used function. Here we using a simple lamda expression to extract id. Another simple way is:

payload map $.id