properties - Mulesoft Dataweave use a variable as item in a selection at a JSON object - Stack Overflow

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I want to do a selection on an item based on a (yaml) property in Dataweave. I have this code:

%dw 2.0

var testWithProperty = p('incoming.var')
// incoming.var  refers to the value "resultSet"

var inPayload = [
    resultSet: {
        id: "some Id"
    },
    resultSet: {
        id: "some other Id"
    }
]

output application/json
---
{
    "result1": inPayload..resultSet,
    "result2": inPayload..testWithProperty
}

result right now is like this:

{
  "result1": [
    {
      "id": "some Id"
    },
    {
      "id": "some other Id"
    }
  ],
  "result2": null
}

result2 is null.

The result should be this:

{
  "result1": [
    {
      "id": "some Id"
    },
    {
      "id": "some other Id"
    }
  ],
  "result2": [
    {
      "id": "some Id"
    },
    {
      "id": "some other Id"
    }
  ]
}

How can I use a property in such a case on a selection ?

I want to do a selection on an item based on a (yaml) property in Dataweave. I have this code:

%dw 2.0

var testWithProperty = p('incoming.var')
// incoming.var  refers to the value "resultSet"

var inPayload = [
    resultSet: {
        id: "some Id"
    },
    resultSet: {
        id: "some other Id"
    }
]

output application/json
---
{
    "result1": inPayload..resultSet,
    "result2": inPayload..testWithProperty
}

result right now is like this:

{
  "result1": [
    {
      "id": "some Id"
    },
    {
      "id": "some other Id"
    }
  ],
  "result2": null
}

result2 is null.

The result should be this:

{
  "result1": [
    {
      "id": "some Id"
    },
    {
      "id": "some other Id"
    }
  ],
  "result2": [
    {
      "id": "some Id"
    },
    {
      "id": "some other Id"
    }
  ]
}

How can I use a property in such a case on a selection ?

• properties
• dataweave
• mulesoft

Share Improve this question Follow edited Feb 25 at 0:11 eglease 2,7541111 gold badges2020 silver badges3434 bronze badges asked Feb 24 at 9:55 BenBen 74211 gold badge1111 silver badges3434 bronze badges 1

• Using the descendant selector will match any key with the expected value, even several levels nested. If you know that the expected key is at the first level and repeats just use the multi valued selector: inPayload.*resultSet. – aled Commented Feb 24 at 12:54

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1 Answer 1

Sorted by: Reset to default 2

You need to use Dynamic Selector for this.

{
    "result1": inPayload..resultSet,
    "result2": inPayload..[testWithProperty],
    "result3": inPayload.."$(testWithProperty)"
}

When you do inPayload..testWithProperty it will look for the property testWithProperty and will not resolve the testWithProperty as a variable. When you use Dynamic Selector inPayload..[testWithProperty] OR inPayload..'$(testWithProperty)' it the value will be evaluated as you need.

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