How should trpc query calls be implemented in a Next.js application for optimal performance?

Question

How should trpc query calls be implemented in a Next.js application for optimal performance?

Transitioning from pure frontend React to Next.js, I am currently working on implementing trpc calls to the backend. While this is a familiar process for me, it seems that the approach I've been using may not be appropriate in this case.

const [weight, setWeight] = useState<ChildWeightDataType[]>([]);

useEffect(() => {
  if (activeChildId) {
    const clientQuery =  trpc.children.getWeight.useQuery({
      childId: activeChildId
    });
    setWeight(clientQuery.data)
  }
}, [activeChildId]);

It appears that the main issue lies in the fact that useQuery is a hook, and using it within another hook is not allowed. What would be the correct pattern to follow in this scenario?

typescript next.js react-hooks react-query trpc

Answer 1

Answer №1

Utilize the useQuery method and extract the data attribute by deconstructing it.

const {data} = trpc.useQuery()

After that, implement useEffect to monitor any modifications in the data property and execute the desired effect.

Answer 2

Utilize the useQuery method and extract the data attribute by deconstructing it.

const {data} = trpc.useQuery()

After that, implement useEffect to monitor any modifications in the data property and execute the desired effect.

Answer 3

Answer №2

It is important to note that calling React hooks from the `useEffect` hook's callback function is not allowed.

A helpful resource for understanding this concept can be found at trpc.useQuery, which acts as a thin wrapper around Tanstack's useQuery. By moving the query invocation, like `trpc.children.getWeight.useQuery({childId:activeChildId});`, to the top-level and passing the appropriate query options, you can ensure that the query is triggered when the `childId` becomes available. Refer to the documentation on Dependent Queries for more information.

For example:

const { data: weight } = trpc.children.getWeight.useQuery(
  // query input
  { childId: activeChildId },
  // options
  {
    enabled: !!activeChildId
  },
);

In general, it is considered a React anti-pattern to copy data or store derived data by storing `data` in the local `weight` state instead of directly referencing `data`. However, if you do need to keep a local copy of the fetched data that can be updated independently from the queried data, you can use `useEffect` to synchronize the state.

const [weight, setWeight] = useState<ChildWeightDataType[]>([]);

const { data } = trpc.children.getWeight.useQuery(
  // input
  { childId: activeChildId },
  // options
  {
    enabled: !!activeChildId
  },
);

useEffect(() => {
  if (data) {
    setWeight(data);
  }
}, [data]);

Answer 4

It is important to note that calling React hooks from the `useEffect` hook's callback function is not allowed.

A helpful resource for understanding this concept can be found at trpc.useQuery, which acts as a thin wrapper around Tanstack's useQuery. By moving the query invocation, like `trpc.children.getWeight.useQuery({childId:activeChildId});`, to the top-level and passing the appropriate query options, you can ensure that the query is triggered when the `childId` becomes available. Refer to the documentation on Dependent Queries for more information.

For example:

const { data: weight } = trpc.children.getWeight.useQuery(
  // query input
  { childId: activeChildId },
  // options
  {
    enabled: !!activeChildId
  },
);

In general, it is considered a React anti-pattern to copy data or store derived data by storing `data` in the local `weight` state instead of directly referencing `data`. However, if you do need to keep a local copy of the fetched data that can be updated independently from the queried data, you can use `useEffect` to synchronize the state.

const [weight, setWeight] = useState<ChildWeightDataType[]>([]);

const { data } = trpc.children.getWeight.useQuery(
  // input
  { childId: activeChildId },
  // options
  {
    enabled: !!activeChildId
  },
);

useEffect(() => {
  if (data) {
    setWeight(data);
  }
}, [data]);

How should trpc query calls be implemented in a Next.js application for optimal performance?

Answer №1

Answer №2

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