helpful-purple•13mo ago

invalid hook call error

Hi, using refine.dev (vite) I'm trying to "preload" data from UseList In order to do that, i'm tryint to write something like the following: export const BaseElementsList: React.FC<IResourceComponentsProps> = () => { const [all_categories, set_all_categories] = useState([]); useEffect(() => { async function fetchCategories() { const { data: categories_data } = await useList<ICourier, HttpError>({ resource: 'base-categories', }); const data = await categories_data?.data ?? []; console.log( data ); set_all_categories(data); } fetchCategories(); }, []); but the problem is that i got the error: ncaught (in promise) Error: Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons: 1. You might have mismatching versions of React and the renderer (such as React DOM) 2. You might be breaking the Rules of Hooks 3. You might have more than one copy of React in the same app what am i doing wrong ?

9 Replies

kapa.ai•13mo ago

Hi @dannywhiteagile. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- The error you're encountering is due to the fact that you're trying to use a hook (useList) inside a function (fetchCategories) that is not a React component. According to the Rules of Hooks (https://reactjs.org/docs/hooks-rules.html), hooks can only be called at the top level of a React function component or a custom hook. Here's how you can refactor your code to follow the rules of hooks:

export const BaseElementsList: React.FC<IResourceComponentsProps> = () => {
    const [all_categories, set_all_categories] = useState([]);

    const { data, isLoading, isError } = useList<ICourier, HttpError>({
        resource: 'base-categories',
    });

    useEffect(() => {
        if (data) {
            set_all_categories(data.data ?? []);
        }
    }, [data]);

    if (isLoading) {
        return <div>Loading...</div>;
    }

    if (isError) {
        return <div>Something went wrong!</div>;
    }

    // Rest of your component
};

export const BaseElementsList: React.FC<IResourceComponentsProps> = () => {
    const [all_categories, set_all_categories] = useState([]);

    const { data, isLoading, isError } = useList<ICourier, HttpError>({
        resource: 'base-categories',
    });

    useEffect(() => {
        if (data) {
            set_all_categories(data.data ?? []);
        }
    }, [data]);

    if (isLoading) {
        return <div>Loading...</div>;
    }

    if (isError) {
        return <div>Something went wrong!</div>;
    }

    // Rest of your component
};

In this refactored code, useList is called at the top level of the component, and the useEffect hook is used to update all_categories whenever data changes. This way, you're not breaking the rules of hooks. For more information on how to use the useList hook, you can refer to the refine documentation (https://refine.dev/docs/api-reference/core/hooks/data/useList/). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•13mo ago

<@1129002557419827210> kapa.ai is still learning and improving, please let us know how it did by reacting below

helpful-purple•13mo ago

that is not what I need. I use this to avoid refetching using Uselist that is not what I need. I use this to avoid refetching using Uselist @kapa.ai that is not what I need. I use this to avoid refetching using Uselist

kapa.ai•13mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- If you want to avoid refetching data with useList, you can leverage the caching feature provided by the underlying data fetching library used by Refine, which is React Query. React Query provides a caching mechanism out of the box. When you fetch data using useList, the data is cached and any subsequent calls to useList with the same parameters will retrieve the data from the cache instead of making a new network request. However, if you want to manually control when the data is refetched, you can use the enabled option in useList. By setting enabled to false, the query will not automatically run. You can then manually trigger the query using the refetch function returned by useList. Here's an example:

export const BaseElementsList: React.FC<IResourceComponentsProps> = () => {
    const [fetch, setFetch] = useState(false);

    const { data, isLoading, isError, refetch } = useList<ICourier, HttpError>({
        resource: 'base-categories',
        enabled: fetch,
    });

    useEffect(() => {
        if (!fetch) {
            setFetch(true);
            refetch();
        }
    }, [fetch, refetch]);

    if (isLoading) {
        return <div>Loading...</div>;
    }

    if (isError) {
        return <div>Something went wrong!</div>;
    }

    // Rest of your component
};

export const BaseElementsList: React.FC<IResourceComponentsProps> = () => {
    const [fetch, setFetch] = useState(false);

    const { data, isLoading, isError, refetch } = useList<ICourier, HttpError>({
        resource: 'base-categories',
        enabled: fetch,
    });

    useEffect(() => {
        if (!fetch) {
            setFetch(true);
            refetch();
        }
    }, [fetch, refetch]);

    if (isLoading) {
        return <div>Loading...</div>;
    }

    if (isError) {
        return <div>Something went wrong!</div>;
    }

    // Rest of your component
};

In this example, useList will not run until fetch is set to true. The useEffect hook is used to set fetch to true and call refetch when the component mounts, which will trigger the useList query. For more information on how to control query execution, you can refer to the React Query documentation (https://tanstack.com/query/v4/docs/react/reference/useQuery) and the Refine documentation on useList (https://refine.dev/docs/api-reference/core/hooks/data/useList/). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•13mo ago

<@1129002557419827210> kapa.ai is still learning and improving, please let us know how it did by reacting below

helpful-purple•13mo ago

@kapa.ai could you give me the final code, mixing the 2 answers?

kapa.ai•13mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Sure, here's how you can combine the two solutions:

export const BaseElementsList: React.FC<IResourceComponentsProps> = () => {
    const [fetch, setFetch] = useState(false);

    const { data, isLoading, isError, refetch } = useList<ICourier, HttpError>({
        resource: 'base-categories',
        enabled: fetch,
    });

    useEffect(() => {
        if (!fetch) {
            setFetch(true);
            refetch();
        }
    }, [fetch, refetch]);

    useEffect(() => {
        if (data) {
            set_all_categories(data.data ?? []);
        }
    }, [data]);

    if (isLoading) {
        return <div>Loading...</div>;
    }

    if (isError) {
        return <div>Something went wrong!</div>;
    }

    // Rest of your component
};

export const BaseElementsList: React.FC<IResourceComponentsProps> = () => {
    const [fetch, setFetch] = useState(false);

    const { data, isLoading, isError, refetch } = useList<ICourier, HttpError>({
        resource: 'base-categories',
        enabled: fetch,
    });

    useEffect(() => {
        if (!fetch) {
            setFetch(true);
            refetch();
        }
    }, [fetch, refetch]);

    useEffect(() => {
        if (data) {
            set_all_categories(data.data ?? []);
        }
    }, [data]);

    if (isLoading) {
        return <div>Loading...</div>;
    }

    if (isError) {
        return <div>Something went wrong!</div>;
    }

    // Rest of your component
};

In this combined solution, useList will not run until fetch is set to true. The first useEffect hook is used to set fetch to true and call refetch when the component mounts, which will trigger the useList query. The second useEffect hook is used to update all_categories whenever data changes. For more information on how to control query execution, you can refer to the React Query documentation (https://tanstack.com/query/v4/docs/react/reference/useQuery) and the Refine documentation on useList (https://refine.dev/docs/api-reference/core/hooks/data/useList/). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•13mo ago

<@1129002557419827210> kapa.ai is still learning and improving, please let us know how it did by reacting below

helpful-purple•13mo ago

@kapa.ai rewriting my own login.tsx, i have a code like this <TextField {...register("password", { required: true, })} id="password" margin="normal" fullWidth name="password" label={t("pages.login.fields.password", "Password")} helperText={errors?.password?.message} error={!!errors.password} type="password" value={null as any} placeholder="●●●●●●●●" sx={{ mb: 0, }} /> I would remove the default value from the input. How can I do this?