using collection route API for mdx

[hotfudgecake]

Hi everyone! I'm trying to use the collection route API for mdx files.

I've loaded gatsby-plugin-mdx, and added a {Mdx.parent__(File)__name}.js under pages

however, i'm getting this warning

The GraphQL query in the non-page component "../{Mdx.parent__(File)__name}.js" will not be run.
Exported queries are only executed for Page components. It's possible you're
trying to create pages in your gatsby-node.js and that's failing for some
reason.

when navigating to the mdx page in browser, it's also not rendered in the layout defined in {Mdx.parent__(File)__name}.js.

is there anything else i need to do?

[KyleAMathews]

Can you make other collection routes work?