Thembo Coach•14mo ago

TypeError: Cannot read properties of null (reading '_def')

As the title says, I get the following: TypeError: Cannot read properties of null (reading '_def') at isRouter (/app/node_modules/@trpc/server/dist/config-3ab6b85e.js:52:42) at recursiveGetPaths (/app/node_modules/@trpc/server/dist/config-3ab6b85e.js:84:21) at createRouterInner (/app/node_modules/@trpc/server/dist/config-3ab6b85e.js:94:9) at appRouter (/app/dist/routers/_app.js:19:49) at startServer (/app/dist/server.js:56:20) at process.processTicksAndRejections (node:internal/process/task_queues:95:5) I might have some sort of malconfigured something, but I have no idea where to start looking. Can anyone point me in the right direction?

5 Replies

Nick•14mo ago

Are your trpc versions all the same?

Thembo CoachOP•14mo ago

yeah they are 🤔 i can say it's started happening since we updated from 10.18 -> 10.41 @Nick Lucas sorry for the ping. Basically in 10.18, we had a router definition like fooRouter = __DEV__ ? someRouter() : (null) This actually worked back then and is now breaking.

Nick•14mo ago

Interesting, I don’t think it’s a usage pattern we really were aware of. What happens if instead of null you pass an empty router?

jonathanj•14mo ago

Empty router works fine, admittedly null was not a good original choice (my fault).

Nick•14mo ago

That seems the sanest solution then 🙂