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

Input

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

Output

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1	["11111", "22222", "33333"]

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

DataWeave Script

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%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