if else - how does it work for simple conditions?

[niloc7]

I am trying to use the product-id from the parent page in the child pages.

Simple enough, all it needs is {{ parent:product-id }}

Okay, but there is also the main product page (which is the parent page) where I will simply use {{ product-id }} instead.

Question: How do I formulate the if else statement for this? :O (As they share the same template)

{{ if parent:product-id }} {{ else product-id }} doesn't seem to work.. well why would it.. doesn't seem logical :/

[niloc7]

This seems like a solution but it seems rather long.. is there a shorter way of doing this?

{{ if parent:product-id }}
                {{ parent:product-id }}
            {{ else }}
                {{ product-id }}
            {{ /if }}

[niloc7]

Ooh ternary operators!

{{ product-id ? product-id : parent:product-id }}

Hmm.. I wonder if there is an even more efficient way to do this.. or is this the best practice?

[jasonvarga]

{{ product-id ?? parent:product-id }}

https://statamic.dev/antlers#null-coalescence

[niloc7]

Wow that is a cool feature indeed!! Thanks Jason!