DataWeave unflatten mapping - mule

Question

Need some help in writing DataWeave for this Salesforce payload.
Please help with creating a DataWeave for this input and expected output.
INPUT
[
{
"Order": {
"Account_Name__c": "test danish 002",
"Id": "8018s000004mpqjAAA",
"type": "Order"
},
"UnitPrice": "13.45",
"Product2": {
"Id": null,
"type": "Product2",
"Name": "* 1 LEG FOR MESAHORNO STAND110"
},
"Id": "8028s000000kyUDAAY",
"type": "OrderItem",
"OrderItemNumber": "0000051590"
},
{
"Order": {
"Account_Name__c": "test danish 002",
"Id": "8018s000004mpqjAAA",
"type": "Order"
},
"UnitPrice": "308.45",
"Product2": {
"Id": null,
"type": "Product2",
"Name": "* 2 Uprights incl castors f RTWZ 600 Var"
},
"Id": "8028s000000kyUEAAY",
"type": "OrderItem",
"OrderItemNumber": "0000051591"
},
{
"Order": {
"Account_Name__c": "test danish 002",
"Id": "8018s000004mpqjAAA",
"type": "Order"
},
"UnitPrice": "31.0",
"Product2": {
"Id": null,
"type": "Product2",
"Name": "* 25 Comp Glass Rack - 3 Ext - Red Base"
},
"Id": "8028s000000kyUFAAY",
"type": "OrderItem",
"OrderItemNumber": "0000051592"
},
{
"Order": {
"Account_Name__c": "test danish 002",
"Id": "8018s000004mpqjAAA",
"type": "Order"
},
"UnitPrice": "31.65",
"Product2": {
"Id": null,
"type": "Product2",
"Name": "* 36 Comp Glass Rack 3 Ext - Gray"
},
"Id": "8028s000000kyUGAAY",
"type": "OrderItem",
"OrderItemNumber": "0000051593"
}
]
This is the Salesforce Query on OrderLineItems but the transformed payload needs to be done on Order Object
and the output would look like
Output
{
"Id":"8018s000004mpqjAAA",
"Order Name": "test danish 002",
"Line Items": [
{
"Id":"8028s000000kyUDAAY",
"ItemNumber":"0000051590",
"Name":"* 1 LEG FOR MESAHORNO STAND110"
},
{
"Id":"8028s000000kyUEAAY",
"ItemNumber":"0000051591",
"Name":"* 2 Uprights incl castors f RTWZ 600 Var"
},
{
"Id":"8028s000000kyUFAAY",
"ItemNumber":"0000051592",
"Name":"* 25 Comp Glass Rack - 3 Ext - Red Base"
},
{
"Id":"8028s000000kyUGAAY",
"ItemNumber":"0000051593",
"Name":"* 36 Comp Glass Rack 3 Ext - Gray"
}
]
}

Answer 1

Try like this:
%dw 2.0
output application/json
---
{
"Id" : payload[0].Order.Id,
"Order Name": payload[0].Order.Account_Name__c,
"Line Items" : payload map{
Id: $.Id,
ItemNumber : $.OrderItemNumber,
"Line Items" : $.Product2.Name
}
}

Answer 2

Assuming that all the order IDs are same you can just map the Id directly from payload and use the map on payload to get the Line Items
%dw 2.0
output application/json
---
{
Id: payload[0].Order.Id,
"Order Name": payload[0].Order.Account_Name__c,
"Line Items": payload map {
Id: $.Id,
ItemNumber: $.OrderItemNumber,
Name: $.Product2.Name
}
}

Answer 3

Here is one more option that you can try when ordered Id's are not the same
%dw 2.0
output application/json
---
payload groupBy ((item, index) -> item.Order.Id)
mapObject ((value, key, index) ->
{"Id": value.Order.Id[0],
"Order Name": value.Order.Account_Name__c[0],
"Line Items": value map ({
Id: $.Id,
ItemNumber: $.OrderItemNumber,
Name: $.Product2.Name
})}
)