Retrieve only values from Array - json

Question

I need to retrieve only the values from an array of a payload, using dataweave in mule.
I have tried using the ++ technique, but it returns errors or when I put the values variable set an an array I get " in the results.
Input:
{
"Shops":
[{
"StoreName": "Store1",
"Sales":
[{"dayDate": "01/01/2019",
"product": "A",
"quantity": 2
},
{"dayDate": "02/01/2019",
"product": "B",
"quantity": 1
}
]
}]
}
I expect the Output:
[Store1, [01/01/2019, A, 2], [02/01/2019, B, 1]]
but actual is
["Store1, [01/01/2019, A, 2], [02/01/2019, B, 1]"]
How do I remove the " or if there is a better way of obtaining my expected output?

Answer 1

You need the pluck function, which transforms an object into an array (docs here).
%dw 2.0
output application/json
var shops = {
"Shops": [
{
"StoreName": "Store1",
"Sales": [
{
"dayDate": "01/01/2019",
"product": "A",
"quantity": 2
},
{
"dayDate": "02/01/2019",
"product": "B",
"quantity": 1 }]}]}
var res = shops.Shops map (shop) ->
using (sales = shop.Sales map (sale) -> sale pluck $)
[shop.StoreName] ++ sales
---
flatten(res)
This goes a bit beyond what you've described so that it can also handle multiple shops. If you need to be able to handle multiple shops, you probably won't want to use flatten, but it is there so the output matches what you asked for.
Output:
[
"Store1",
[
"01/01/2019",
"A",
2
],
[
"02/01/2019",
"B",
1
]
]