Custom directive for email template not working as per Docs example (Magento 2.4.3-p2, 2.4.4)

[akislawek]

Is there an existing issue for this?

• [x] I have searched the existing issues

Which topic?

https://devdocs.magento.com/guides/v2.4/frontend-dev-guide/templates/template-email-migration.html#create-a-custom-directive

What's wrong with the content?

The example provided in the "Create a custom directive" section does not seem to work. I've tried with Magento 2.4.3-p2 as well as the newest 2.4.4. When I use the newly created directive ({{lifetime_spend}}) in an email template (ex. "New Order"), it is not interpreted, and shows as "{{lifetime_spend}}" in the email body.

Perhaps it's something else wrong on my side, but since I haven't been able to find a working example on the Internet, and having received no answers to my question posted on stack exchange, I decided to post my issue here.

I'd be grateful for someone to either confirm if this is an issue with Magento, or direct me to correctly implement a custom directive.

What changes do you propose?

I was expecting the example code to work "out-of-the-box".

Anything else that can help to cover this?

No response

[m2-assistant[bot]]

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[vandijkstef]

I found your question on SE, and following up I ended up here. Can confirm, on Mage2.4.4, that dropping the underscore (replace lifetime_spend with lifetimespend) and re-running setup:di:compile did work for me. Along the way I also set the is_legacy in the database to 0, but I'm not sure that had any real influence.

[nkajic]

Here to confirm @vandijkstef's statement. Open source v2.4.4-p4 Example from Create a custom directive not working until underscore _ is removed