How to use integer type variable in File System API collection routes?

[mottox2]

I'm trying to use File System API.
My datasource is referenced by an integer type, so I get the following error message.

Variable "$number" of type "String!" used in position expecting type "Int".

If you're e.g. filtering for specific nodes make sure that you choose the correct field (that has the same type "String!") or adjust the context variable to the type "Int".

How do I convert a query variable to an integer type with collection routes?

pages/posts/{MyPost.number}.tsx

export const query = graphql`
  query PostPage($number: String!) {
    myPost(number: { eq: $number }) {
      title
      number
      content
    }
  }
}

[LekoArts]

You'll have to change query PostPage($number: String!) to query PostPage($number: Int!)

[mottox2]

Thanks. I changed query PostPage($number: String!) to query PostPage($number: Int!).
When I executed gatsby develop, I got the following error.

$ gatsby develop
success open and validate gatsby-configs - 0.089s
success load plugins - 3.415s
success onPreInit - 0.036s
success initialize cache - 0.005s
success copy gatsby files - 0.041s
success onPreBootstrap - 0.016s
success createSchemaCustomization - 0.002s
success Checking for changed pages - 0.000s
success source and transform nodes - 7.516s
error Missing onError handler for invocation 'building-schema', error was 'Error: MyPost.gatsbyPath provided incorrect OutputType: 'String''. Stacktrace was 'Error: MyPost.gatsbyPath provided incorrect OutputType: 'String'
not finished building schema - 507.815s

[LekoArts]

Can you please post a reproduction/repository so that I can have a look at it? :)