mule 4 DataWeave2.0 swaping object,key and values from json payload

Question

i'm facing an issue while trying to change data from payload and converting it to another api which requires different type of input with same values

input payload

{"metadata":
    {"attributes":
        [
        {
            "name":"FromDate",
            "value":"22-09-2021"
        },
        {
            "name":"ToDate",
            "value":"22-02-2022"
        }
        {
            "name":"Purchased",
            "value":"21-02-2021"
        }
        ]
    }
}

expected output payload

{"attributes":
    {
    "FromDate":"22-09-2021",
    "ToDate":"22-02-2022",
    "Purchased":"21-02-2021"
    }
}

i have tried the below code to transform the data but unable to acheive the result

%dw 2.0
output application/json
---
{
    "attributes": payload."metadata"."attributes" map ((item, index) -> {(item."name"):item."value"})
}

any suggestions and answers are welcome

Answer 1

You could as well do something purely using map.

%dw 2.0
output application/json
---
attributes: {(payload.metadata.attributes map {
    ($.name): ($.value)
})}