"Where" function with "in" doesn't work?

support
1

Could I know why this does not work, and how to make this work?

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tags: ["foo", "bar"]
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{{ range where .Data.Pages.ByTitle "Params.tags" "in" "foo" }}
2

Tags is likely being used as a taxonomy and wouldn’t appear in the Params

3

Still this does work, in the similar way explained in the document.

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tags: "foo"
+++

{{ range where .Data.Pages.ByTitle "Params.tags" "foo" }}

I’m confused…