Theo Gravity•14mo ago

How do I log thrown errors from the query/ mutation on the server side globally?

I was surprised to find that the server servicing tRPC requests do not log any thrown errors from a query / mutation to the console by default (but the client does capture errors). I want to be able to log all errors on the server side. How would I do this? This page doesn't really give me any clues as I don't know what trpcNext.createNextApiHandler refers to: https://trpc.io/docs/server/error-handling#handling-errors I am using the express adapter with tRPC. I do not want to have to attach an error handling function to each query / mutation I define.

Error Handling | tRPC

Whenever an error occurs in a procedure, tRPC responds to the client with an object that includes an "error" property. This property contains all the information that you need to handle the error in the client.

5 Replies

Nick•14mo ago

All the adapters have an onError callback so you can use that Look at the docs for your adapter

Theo Gravity•14mo ago

It doesn't offer anything around that: https://trpc.io/docs/server/adapters/express

Express Adapter | tRPC

Example app

Theo Gravity•14mo ago

Same with the source for it: https://github.com/trpc/trpc/blob/main/examples/express-server/src/server.ts

GitHub

trpc/server.ts at main · trpc/trpc

🧙‍♀️ Move Fast and Break Nothing. End-to-end typesafe APIs made easy. - trpc/server.ts at main · trpc/trpc

Nick•14mo ago

It might not be directly documented in this case, but it’s there and your editor autocomplete is all the docs you really need, get your editor to list all the options you can pass to the adapter

Theo Gravity•14mo ago

Typing on did help in the autocomplete for the adapter, thanks

    trpcExpress.createExpressMiddleware({
      router: appRouter,
      createContext,
      onError({ error, ctx }) {

      },

    trpcExpress.createExpressMiddleware({
      router: appRouter,
      createContext,
      onError({ error, ctx }) {

      },