Support data layer variables that read and element from an array?

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1

Hello dear community,

We just wanted to switch from GA4 and Google Tag Manager to Piwik Pro with several projects. But now I am a bit irritated, because it seems that the Piwik Pro tag manager does not support data layer variables that can read a value from a data layer array.

Example Data Layer

{
   "event": "view_item",
   "ecommerce": {
      "currency": "EUR",
      "value": 3500,
      "items": [
         {
            "item_id": "12345",
            "item_name": "Name",
            "item_category": "C1",
            "item_category2": "C2",
            "item_category3": "C3",
            "item_category4": "C4",
            "item_category5": "C5",
            "item_variant": "F/S",
            "price": 3500,
            "quantity": 1
         }
      ]
   }

If I now want to read a certain value from the array, e.g. “item_name”, my normal procedure would be to create a data layer variable that queries “ecommerce.items.0.item_name”. Am I doing something wrong or is this really not supported?

We have almost 70 data layer events containing arrays, do we really need to write a custom java script for each of these data layers?

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2

Hi. Yes, it’s not supported now but it’s on our short term roadmap. To make the transition faster, you can use a custom js variable. There you can use variable inside variable, so getting to the nested values shouldn’t be a big issue.

For instance, you can create a variable {{ ecommerce }} and then another custom js variable that is defined as {{ ecommerce }}.value.

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