React Hook error when calling the Apollo useQuery()

Question

i am getting the below error while i am trying to use the useQuery(). Plese let me know if you need additional details..

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 See for tips about how to debug and fix this problem.

my code is as below...

get-characters-action.js

import React from "react";
import * as ACTION_TYPES from "./../constants/action-types";
import { useQuery } from "@apollo/react-hooks";
import gql from 'graphql-tag';

export const getCharactersSuccess = (data) => {
    return {
        type:ACTION_TYPES.LOAD_CHARACTERS_SUCCESS,
        data
    }
}

export const getCharactersInProgress = () => {
    return {
        type:ACTION_TYPES.LOAD_CHARACTERS_INPROGRESS
    }
}

export const getCharactersError = (error) => {
    return {
        type:ACTION_TYPES.LOAD_CHARACTERS_ERROR,
        error
    }
}

const GET_CHARACTERS =gql`
{
    allPersons {
        name
        gender
        homeworld {
            name
        }
        species {
            name
            language
            classification
        }
    }
}`;

export const useGetCharacters= () => {
    const { loading, error, data } = useQuery(GET_CHARACTERS);

    if(loading) {
        getCharactersInProgress();
    }

    if(error) {
        getCharactersError(error);
    }

    if(data) {
        getCharactersSuccess(data);
    }
}

context-state-config.js

export const ContextState = (props) => {
    // const [stateReducer, dispatchReducer] = useReduceWithLogger(Reducer.AppLoadingReducer,Reducer.initialState);
    const [stateReducer, dispatchReducer] = useReducer(Reducer.MainReducer,Reducer.initialState);

    const handleDispatchAppLoadingInProgress = () => {
        dispatchReducer(GENERIC_ACTION.appLoadingInprogress());
    }

    const handleDispatchAppLoadingSuccess = () => {
        dispatchReducer(GENERIC_ACTION.appLoadingSuccess());
    }

    // const getCharacters = () => {
    //     dispatchReducer(GET_CHARACTERS_ACTION.useGetCharacters());
    // }

    const graphqlClient = new ApolloClient({
        uri: "https://swapi.graph.cool/"
    });

    return (
        <div>
            <ApolloProvider client={graphqlClient}>
                <Context.Provider
                    value={{
                        // reducer
                        isAppReady: stateReducer.isAppReady,
                        dispatchAppLoading: () => handleDispatchAppLoadingInProgress(),
                        dispatchAppLoaded: () => handleDispatchAppLoadingSuccess(),
                        // get character action
                        getCharacters: () => dispatchReducer(GET_CHARACTERS_ACTION.useGetCharacters())
                    }}
                >

                        {
                            props.children
                        }
                </Context.Provider>
            </ApolloProvider>
        </div>
    )
}

Oleg Kupriianov Oleg Kupriianov · Accepted Answer · 2019-12-24T15:33:13

You can't invoke your GET_CHARACTERS_ACTION.useGetCharacters() inside another function it is like custom react hook that should be called only inside your functional react component.

React Hook error when calling the Apollo useQuery()

1 Answers