Conditional display based on related collection

[scottmetoyer]

I have a need to conditionally show some HTML if a related collection has any content.

My "products" may or may not have related "reviews" and I want to show a link to the reviews on the product page if any exist. The reviews have a product field that is an ID back to the product. This is the code I have in the Antlers template for the product view:

{{ if ({ collection:reviews product:is="id"  | count}) > 0 }}
...
{{ /if }}

But that's not working. What am I missing? This is on Statamic 3.2.

Thanks in advance.

[scottmetoyer]

I ended up solving this by using a filtered collection tag and adding my conditional HTML on the first iteration. Works great!

{{ collection:reviews product:is="{id}" }}
   {{ if first }}
   ...
   {{ /if }}
{{ /collection:reviews }}