Theo's Typesafe Cult•2y ago

Passing URL Params to TRPC causes Error on First Render, as URL-Param is undefined

I am not sure if I am missing something, but I can't get this to work. I am getting some id passed down in my url params, and I want to pass down that id to trpc, to fetch some data from my database:

const Home: NextPage = () => {
    const router = useRouter()

    const { data, isLoading } = trpc.module.getOne.useQuery({
        id: router.query.moduleId
    });
    //...
};

export default Home;

const Home: NextPage = () => {
    const router = useRouter()

    const { data, isLoading } = trpc.module.getOne.useQuery({
        id: router.query.moduleId
    });
    //...
};

export default Home;

Now the problem seems to be that id isn't there on first render: the router will first have to get it etc., so I get a TRPC Client Error, as id at this time is undefined

TRPCClientError: [
  {
    "code": "invalid_type",
    "expected": "string",
    "received": "undefined",
    "path": [
      "id"
    ],
    "message": "Required"
  }
]
    at TRPCClientError.from (transformResult-106791d7.mjs?2721:4:1)
    at eval (httpBatchLink.mjs?9fec:190:40)

TRPCClientError: [
  {
    "code": "invalid_type",
    "expected": "string",
    "received": "undefined",
    "path": [
      "id"
    ],
    "message": "Required"
  }
]
    at TRPCClientError.from (transformResult-106791d7.mjs?2721:4:1)
    at eval (httpBatchLink.mjs?9fec:190:40)

What am I missing here?

3 Replies

Neto•2y ago

its correct tho you should enable the query only when the router is ok

const { data, isLoading } = trpc.module.getOne.useQuery({
        id: router.query.moduleId
    }, {
  enabled: router.isReady
});

const { data, isLoading } = trpc.module.getOne.useQuery({
        id: router.query.moduleId
    }, {
  enabled: router.isReady
});

when isReady is true, the router is fine to query with

plygltOP•2y ago

omg, thank you so much. really love this community for stuff like this!! i had done this before and shouldve known but somehow felt stuck

Unknown User•2y ago

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Passing URL Params to TRPC causes Error on First Render, as URL-Param is undefined