Theo's Typesafe Cult•2y ago

Verifying query type in `getServerSideProps`

Hello. I have a getServerSideProps function and would like to verify the query to avoid security vulnerabilities and return a 404 page:

interface QueryType {
  id: string;
}

export const getServerSideProps = async ({ query }) => {
  // check query matches QueryType and return 404 page (return { notFound: true }) otherwise

  // ... use id to query from db and return
}

interface QueryType {
  id: string;
}

export const getServerSideProps = async ({ query }) => {
  // check query matches QueryType and return 404 page (return { notFound: true }) otherwise

  // ... use id to query from db and return
}

I've tried validating query with a zod schema, but that doesn't seem to let TS know that query has the type QueryType. How do i verify this in a way which works well for TS?

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Verifying query type in `getServerSideProps`