Using a programmable in a Sitecore Personalize decision model, I want to return a List but List is not an available type in the dropdown.

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1 Answer 1


It is not currently possible to output a List from a decision model, in the settings of a programmable ‘List’ is not one of the available output Types in the settings.

If a list is returned from a programmable it will be transformed into a Map as shown below.

List returned as Map from a decision model programmable:

"output": {
        "0": "list1",
        "1": "list2",
        "2": "list3"

If you are using your decision model in a Full Stack experience, you can transform the Map output of your decision model back into a List using FreeMarker.

FreeMarker for transforming decision model Map into List:

    "list": [
        <#list MyObject?keys as key>
        "${MyObject[key]}"<#sep>, </#sep>

This FreeMarker snippet can also be seen in the snippets section on the right hand side when building an API Response or Webhook in a Full Stack Experience.

Output from FreeMarker for Transformed List: enter image description here

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