Where to validate route parameters?

[thangngoc89]

So I'm setting up an express server for custom routing.
Suppose I have a route like this /u/:username . After parsing the query param, I need to hit the database, find that username and decide whether I should render a profile page or an 404 page.

I have 2 places to do the validating in mind:

• At express server

  • Pros: Sending correct HTTP_STATUS code because I can't find a way to send 404 status within the React app
  • Cons: Hit the database server twice because in the client side, I need extra information rather than just a validated username to render the page. Query all of the data in the express server and sending it via ctx would be super complicated. For clarification, I'm using Apollo Client for managing the data.

• At React app

  • Pros: Hit the database server only one
  • Cons: Improper HTTP_STATUS code, complex error handling. (well, try catch everywhere! OMG)

[nkzawa]

#746 (comment) is the way we recommend.
btw you can import the default error page as next/error and use it for rendering from the next release.

[thangngoc89]

@nkzawa oh nice. Thank you. I was worry for a while before posting the above post. Putting the logic in express mean I have to keep the code in sync manually.