Why are the components not rerendering after Response? - spring

Table with pinia store equipmentlist, fethced from usequipments but table does not rerender
VueTableComponent
<script setup lang="ts">
import { useEquipmentStore } from '~/store/equipmentStore'
import useEquipments from '~/composables/equipments'
const { getEquipmentList } = useEquipments()
onBeforeMount(() => { getEquipmentList() })
const state = useEquipmentStore()
const equipmentList: any = state.equipmentList
const loaded = state.loaded
</script>
<template>
<el-table :key="loaded" :data="equipmentList" style="width: 100%">
<el-table-column type="expand">
<template #default="props">
ID: {{ props.row.id }}
</template>
</el-table-column>
<el-table-column label="ID" prop="id" />
<el-table-column label="Name" prop="name" />
</el-table>
</template>
Typescript File for all CRUD Operations equipment.ts
import { useRouter } from 'vue-router'
import http from '../http-common'
import { useEquipmentStore } from '~/store/equipmentStore'
export default function useEquipments() {
const state = useEquipmentStore()
const errors = ref([]) // array of strings
const router = useRouter()
const getEquipmentList = async() => {
try {
console.log(state.equipmentList.length)
const response = await http.get('/equipment/list')
state.equipmentList = response.data
console.log(state.equipmentList.length)
console.log(state.equipmentList[0])
}
catch (error: any) {
console.log(error.message)
}
}
Equipment(Pinia)Store
import { defineStore } from 'pinia'
import type { Ref } from 'vue'
export const useEquipmentStore = defineStore('equipment', {
state: () => ({
equipment: ref({}) as any,
equipmentList: ref([]) as Ref<any[]>,
}),
actions: {
reset() {
this.equipment = {}
this.equipmentList = []
},
},
})
1. i called several times getEquipment list and it is faster done then i stored an initial equipment, 2. i clicked on the link on the left and fetched several times more and as u can see there is something fetchd but not displayed, 3. after repeating to home and again to Link the component is there and alll other next fetches do indeed function well
Main.ts
app.component('InputText', InputText)
app.mount('#app')
useEquipments().initDB()
}
same fetching class equipment.ts
const initDB = () => {
try {
if (state.equipmentList.length === 0) { storeEquipment({ id: 1, name: 'Firma' }) }
else {
for (const equipment of state.equipmentList) {
console.log(equipment)
if (equipment === 'Firma')
state.equipmentList.splice(state.equipmentList.indexOf(equipment), 1)
}
}
}
catch (error: any) {
console.log(error.message)
}
}

Related

RematchJS Refresh Issue

I am new at using RematchJS and have managed to display hardcoded Objects from an array. The dispatcher (addTopicAsync) however does not seems to update the Array, when I try to add a new Object.
The Array is briefly updated and the topic is flashes on the screen, but the Array is empty shortly afterwards.
My model code:
import { createModel } from "#rematch/core";
import { RootModel } from ".";
export interface Topic {
topic: String
}
export interface TopicsList {
list: Array<Topic>
}
const TOPICS_LIST_STATE = {
list: []
}
export const topics = createModel<RootModel>()({
state: TOPICS_LIST_STATE as TopicsList,
reducers: {
addTopic: (state, topic) => {
return { list: [...state.list, { topic }] }
},
clearTopics: () => {
return { list: [] }
}
},
effects: (dispatch) => ({
async addTopicAsync(topic: string) {
await dispatch.topics.addTopic(topic)
},
async clearTopicsAsync() {
await dispatch.topics.clearTopics()
}
})
});
My application code:
// eslint-disable-next-line #typescript-eslint/no-unused-vars
import { useState } from 'react';
import { useSelector, useDispatch } from 'react-redux';
import { RootState, Dispatch } from '#vanilla/data'
import { Topic } from 'libs/data/src/lib/models/topics';
export function App() {
const [topic, setTopic] = useState("aaa")
const topicsState = useSelector((state: RootState) => state.topics)
const dispatch = useDispatch<Dispatch>()
const topicChange = (event: React.ChangeEvent<HTMLInputElement>) => {
event.preventDefault()
setTopic(event.target.value)
}
const updateTopicList = async () => {
await dispatch.topics.addTopicAsync(topic)
console.log('topicsState : ', topicsState.list)
}
return (
<>
<h3>Topics</h3>
<form>
<input type='text' value={topic} onChange={topicChange} />
<button onClick={() => { updateTopicList() }}> Add Topic</button>
</form>
<div className="container">
{topicsState.list.map((topicRecord: Topic, index: number) => (
<h5 key={index}>
{topicRecord.topic}
</h5>
))}
</div>
</>
)
}
export default (App)

error:Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined

Thanks for everyone stop here whether you inspire me or not.In App.js,there is error message:Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.
This is very classic todolist project in reduxjs official document,but I reshape it with react and react-redux hooks.
Tree view down:
Index.js:
import React from "react";
import ReactDOM from "react-dom";
import App from "./App";
import { createStore } from "redux";
import rootReducer from "./reducers";
import { Provider } from "react-redux";
const store = createStore(
rootReducer,
window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__()
);
ReactDOM.render(
<Provider store={store}>
<App />
</Provider>,
document.getElementById("root")
);
App.js:
import React from "react";
import Addtodo from "./components/Addtodo";
import Footer from "./components/Footer";
import Todolist from "./components/Todolist";
const App = () => {
return (
<>
<Addtodo />
<Todolist />
<Footer />
</>
);
};
export default App;
actions.js
let nextTodoId = 0;
const addtodo = (text) => {
return {
type: "ADD_TODO",
id: nextTodoId++,
text: text
};
};
const toggletodo = (id) => {
return { type: "TOGGLE_TODO", id: id };
};
const setfilter = (filter) => {
return {
type: "SET_VISIBILITY_FILTER",
filter: filter
};
};
const todoActions = { addtodo, toggletodo };
const filterActions = { setfilter };
const allActions = {
todoActions,
filterActions
};
export default allActions;
reducers.js
import { combineReducers } from "redux";
const todo = (state = {}, action) => {
switch (action.type) {
case "ADD_TODO":
return { id: action.id, text: action.text, completed: false };
case "TOGGLE_TODO":
if (state.id === action.id)
return { ...state, completed: !state.completed };
else return state;
default:
return state;
}
};
const todos = (state = [], action) => {
switch (action.type) {
case "ADD_TODO":
return [...state, todo(undefined, action)];
case "TOGGLE_TODO":
return state.map((s) => todo(s, action));
default:
return state;
}
};
const visibilityFilter = (state = "ALL", action) => {
switch (action.type) {
case "SET_VISIBILITY_FILTER":
if (state !== action.filter) return action.filter;
default:
return state;
}
};
const rootReducer = combineReducers({ todos, visibilityFilter });
export default rootReducer;
Addtodo.js
import React, { useEffect } from "react";
import { useSelector, useDispatch } from "react-redux";
import allActions from "../actions";
const Addtodo=() => {
const dispatch = useDispatch();
return(
<>
<input
ref={(node) => {
this.input = node;
}}
/>
<button
onClick={() => {
dispatch(allActions.todoActions.addtodo(this.input.value));
this.input.value = "";
}}
>
Add To Do
</button>
</>
);
};
export default Addtodo;
Todolist.js
import React, { useEffect } from "react";
import { useSelector, useDispatch } from "react-redux";
import allActions from "../actions";
const getvisibletodos = (todos = [], currentFilter) => {
switch (currentFilter) {
case "ALL":
return todos;
case "ACTIVE":
return todos.filter((todo) => todo.completed === false);
case "COMPLETED":
return todos.filter((todo) => todo.completed === true);
}
};
const Todolist = () => {
const todos = useSelector((state) =>
getvisibletodos(state.todos, state.visibilityFilter)
);
const dispatch = useDispatch();
return (
<ul>
{todos.map((todo) => (
<li
key={todo.id}
style={{ textDecoration: todo.completed ? "line-through" : "none" }}
onClick={() => dispatch(allActions.todoActions.toggletodo(todo.id))}
>
{todo.text}
</li>
))}
</ul>
);
};
export default Todolist;
Footer.js
import React, { useEffect } from "react";
import { useSelector, useDispatch } from "react-redux";
import allActions from "../actions";
const Filterlink = ({
children,
filter
}) => {
const active = useSelector(state => state.visibilityFilter ===filter);
const dispatch=useDispatch();
if (active) {
return <span>{children}</span>;
}
return (
<a href='#'
onClick={e => {
e.preventDefault();
dispatch(allActions.filterActions.setfilter(filter));
}}
>
{children}
</a>
);
};
export const Footer = () => (
<p>
Show:
{' '}
<FilterLink filter='ALL'>
All
</FilterLink>
{', '}
<FilterLink filter='ACTIVE'>
Active
</FilterLink>
{', '}
<FilterLink filter='COMPLETED'>
Completed
</FilterLink>
</p>
);
The codesandebox link available:https://codesandbox.io/s/lesson-27-28-29-transition-to-react-redux-hooks-stackoverflow-0fsh6
Wish everyone get new taste in coding everyday.

[updated]Intergrating NextJS and Redux State Management

this my updated version of intergrating redux and NextJS. Just to elobarate what I have done so far...
STEP 1. I've created a store.js file to set up my global store in reference to github's explanation from nextJS developers.
import { createStore, applyMiddleware, combineReducers } from 'redux';
import { createWrapper, HYDRATE } from 'next-redux-wrapper';
import thunkMiddleware from 'redux-thunk';
import { customerListReducer } from './customerReducers';
const bindMiddleware = (middleware) => {
if (process.env.NODE_ENV !== 'production') {
const { composeWithDevTools } = require('redux-devtools-extension');
return composeWithDevTools(applyMiddleware(...middleware));
}
return applyMiddleware(...middleware);
};
const combinedReducer = combineReducers({
customerList: customerListReducer,
});
const reducer = (state, action) => {
console.log('Just Displaying the Store', state);
if (action.type === HYDRATE) {
const nextState = {
...state, // use previous state
...action.payload, // apply delta from hydration
};
if (state.count) nextState.count = state.count; // preserve count value on client side navigation
return nextState;
} else {
return combinedReducer(state, action);
}
};
// create a makeStore function
const store = () =>
createStore(
reducer,
bindMiddleware([thunkMiddleware])
);
// export an assembled wrapper
export const wrapper = createWrapper(store);
STEP 2: Imported the wrapper above in my _app file to make the wrapper available across all pages in my application
import Nav from '../components/Nav';
import {wrapper} from '../reducers/store';
function MyApp({ Component, pageProps }) {
return (
<>
<Nav />
<Component {...pageProps} />
</>
);
}
export default wrapper.withRedux(MyApp);
STEP 3: CONFIGURATIONS
A) My Action that calls external API
import axios from 'axios';
import {
CUSTOMER_LIST_REQUEST,
CUSTOMER_LIST_SUCCESS,
CUSTOMER_LIST_FAIL,
} from '../constants/customerConstants';
export const listCustomers = () => async (dispatch) => {
try {
dispatch({
type: CUSTOMER_LIST_REQUEST,
});
const { data } = await axios.get(
'https://byronochara.tech/gassystem/api/v1/customers'
);
const result = data.results;
dispatch({
type: CUSTOMER_LIST_SUCCESS,
payload: result,
});
} catch (error) {
dispatch({
type: CUSTOMER_LIST_FAIL,
payload:
error.response && error.response.data.message
? error.response.data.message
: error.message,
});
}
};
B)My Action Reducer
import {
CUSTOMER_LIST_REQUEST,
CUSTOMER_LIST_SUCCESS,
CUSTOMER_LIST_FAIL,
} from '../constants/customerConstants';
import { HYDRATE } from 'next-redux-wrapper';
export const customerListReducer = (state = { customers: [] }, action) => {
switch (action.type) {
case HYDRATE:
return { loading: true, customers: [] };
case CUSTOMER_LIST_REQUEST:
return { loading: true, customers: [] };
case CUSTOMER_LIST_SUCCESS:
return {
loading: false,
customers: action.payload,
};
case CUSTOMER_LIST_FAIL:
return { loading: false, error: action.payload };
default:
return state;
}
};
C)The finally bringing it all together in my index.js page to display the results:
import React, { useEffect } from 'react';
import Head from 'next/head';
import { useSelector} from 'react-redux';
import { listCustomers } from './../actions/customerActions';
import { wrapper } from '../reducers/store';
import styles from '../styles/Home.module.css';
const Home = () => {
//Select the loaded customers' list from central state
const customerList = useSelector((state) => {
console.log(state);
return state.customerList;
});
const { loading, error, customers } = customerList;
//displaying the customers data from the external API
console.log('Fetched Customers Data', customers);
return (
<div className={styles.container}>
<Head>
<title>Home | Next</title>
</Head>
<h1>Welcome to Home Page</h1>
{/* {loading && <h6>Loading...</h6>} */}
{/* {error && <h6>Error Occured...</h6>} */}
{/* {customers.map((customer) => (
<h3>{customer.customerName}</h3>
))} */}
{/* <ArticleList customers={customers} /> */}
</div>
);
};
// getStaticProp at build time
// getServerSideProp at every request slower
// getStaticPath to dynamically generate paths based on the data we are fetching
export const getStaticProps = wrapper.getServerSideProps(async ({ store }) => {
// console.log('STORE', store);
store.dispatch(listCustomers());
});
export default Home;
COMMENT ON THE PROBLEM I'M FACING FROM THE ABOVE CODE: once everything has been set up if you follow the code above, the code seems to run well the store is successfully created when I log the result on the console ``{ customerList: { loading: true, customers: [] } }. But then I guess this is the result from the HYDRATE action type since it will always be dispatch since am using getStaticProps``` that creates a new store instance in the server.
MAIN QUIZ: My challenge is how do I bypass the HYDRATED action and reconcile the server side state with the client side store and persist it and at least to finally be able to view the list from the external API. Thanks in advance. :)
I totally recommend you to use reduxjs/toolkit. It's very simple , less code, no wrappers, clean. And no matter your project on nextjs or created via CRA. Also you dont need to configure redux-thunk and redux-devtools cause they are enabled by default. Read documentation for more information ( how to persist state without any npm package and so on )
Here is a little example.
store.js
import { combineReducers, configureStore } from "#reduxjs/toolkit";
import userSlice from './user.slice.js';
//reducers
const rootReducer = combineReducers({
user: userSlice
});
const store = configureStore({
reducer: rootReducer,
});
export default store;
Wrap with Provider (in your case _app.js)
<Provider store={store}>
<Component {...pageProps} />
</Provider>
user.slice.js ( action + reducer )
import { createSlice, createAsyncThunk } from '#reduxjs/toolkit';
const initialState = {
id: '',
email: '',
roles: []
};
// export async action
export const signIn = createAsyncThunk('user/signIn', async (data) => {
try {
const payload = await api.auth.signin(data).then((res) => res.data);
// do some stuff if you want
return payload ;
} catch (err) {
console.log(err.response);
}
});
const userSlice = createSlice({
name: 'user',
initialState,
reducers: {
removeUser(state, payload) {
//cant be an async method
return initialState;
},
extraReducers: (builder) => {
builder.addCase(signIn.fulfilled, (state, { payload }) => {
// payload from the async method above (asyncThunk)
return payload;
});
},
},
});
// export actions
export const { removeUser } = userSlice.actions;
// export reducer
export default userSlice.reducer;
Thats it. Last step to call actions from any component e.g.
import { useDispatch, useSelector } from 'react-redux';
import { signIn, removeUser } from '../actions/userSlice';
// in function component
// call hooks
const dispatch = useDispatch();
// read the store
const { user } = useSelector((state) => state);
// dispatch any action , example below
dispatch(signIn(userCredentials));
// or
dispatch(removeUser());
I has an Issue with setting Redux with NextJS and this is my final answer after some insight from mirik999 too.
A. my store.
import { configureStore } from '#reduxjs/toolkit';
//importing the slice file with sliced reducers
import customerListReducer from '../slices/customerSlice';
// const composedEnhancer = composeWithDevTools(applyMiddleware(thunkMiddleware));
const store = configureStore({
reducer: {
customerList: customerListReducer,
},
});
export default store;
B. The store is provided in my app component
function MyApp({ Component, pageProps }) {
return (
<Provider store={store}>
<Nav />
<Component {...pageProps} />
</Provider>
);
}
export default MyApp;
C. The Slice file that automatically creates action creators and the reducer
import { createSlice } from '#reduxjs/toolkit';
//creating and action that calls API from a REST API backend
export const customersFetchedList = createAsyncThunk(
'customersList/customersListSuccess',
async () => {
try {
const { data } = await axios.get(
'https://example.com/api/your/endpoint'
);
const result = data.results;
//the payload
const payload = result;
return payload;
} catch (error) {
console.log(error.response);
const payload =
error.response && error.response.data.message
? error.response.data.message
: error.message;
return payload;
}
}
);
const initialState = {
loading: true,
customers: [],
error: false,
};
const customerListSlice = createSlice({
name: 'customersList',
initialState,
reducers: {
//reducer functions we've provided
customersRequest(state, action) {
if (state.loading == true) {
return state;
}
},
},
extraReducers: (builder) => {
initialState,
builder.addCase(customersFetchedList.fulfilled, (state, action) => {
state.loading = false;
state.customers = action.payload;
state.error = false;
return state;
});
},
});
export const {
customersRequest,
customersLoadingError,
} = customerListSlice.actions;
export default customerListSlice.reducer;
D. Then finally fired this action above in my component using the useEffect()
import React, { useEffect } from 'react';
import Head from 'next/head';
const Home = () => {
//method to fire the action
const dispatch = useDispatch();
//Select the loaded customers' list from central state
const customerList = useSelector((state) => state);
// const { loading, error, customers } = customerList;
useEffect(() => {
dispatch(listCustomers());
}, []);
return (
<div className={styles.container}>
<Head>
<title>Home | Next</title>
</Head>
<h1>Welcome to Home Page</h1>
{loading && <h6>Loading...</h6>}
{error && <h6>Error Occured...</h6>}
{customers.map((customer) => (
<h3>{customer.customerName}</h3>
))}
</div>
);
};
Thanks so much for your contribution. :)

How to integrate Multiple clients using graphql hooks in react hooks

I wanna integrate multiple clients in my react-hooks application. I'm using graphql-hooks via Apollo client we have a module to integrate multiple clients
Following is the link Apollo graphql multiple client
`https://www.npmjs.com/package/#titelmedia/react-apollo-multiple-clients`
Following I'm using for graphql hooks
https://www.npmjs.com/package/graphql-hooks
How do we achieve the same for graphql-hooks?
My requirement is depending on the selection of the radio button I need to switch between these multiple clients all that in one component using more than one client.
In my app I'm using graphql-hook we wrap the component to the client here the same component has functionality wherein depending on the select one of the radio buttons the client must be switch.I'm having one client but need to integrate multiple clients I googled but i've not found so have questioned here.
Is this possible?
Can anyone please help out there
We can use new GraphQLClient() multiple times to get multiple graphql clients
Here is a good approach and you can follow it: https://www.loudnoises.us/next-js-two-apollo-clients-two-graphql-data-sources-the-easy-way/
I have two middleware graphql servers running. One for the app one for analytics. I do it in two different ways according to my need as below...
CubeClient.jsx
import { ApolloClient } from "apollo-client";
import { InMemoryCache } from "apollo-cache-inmemory";
import { SchemaLink } from "apollo-link-schema";
import { makeExecutableSchema } from "graphql-tools";
const cache = new InMemoryCache();
const defaultDashboardItems = [{"vizState":"{\"query\":{\"measures\":[\"Product.count\"],\"timeDimensions\":[{\"dimension\":\"Product.createdAt\"}],\"dimensions\":[\"Producttype.name\"],\"filters\":[],\"order\":{}},\"chartType\":\"bar\",\"orderMembers\":[{\"id\":\"Product.count\",\"title\":\"Product Count\",\"order\":\"none\"},{\"id\":\"Producttype.name\",\"title\":\"Producttype Name\",\"order\":\"none\"},{\"id\":\"Product.createdAt\",\"title\":\"Product Created at\",\"order\":\"none\"}],\"pivotConfig\":{\"x\":[\"Producttype.name\"],\"y\":[\"measures\"],\"fillMissingDates\":true,\"joinDateRange\":false},\"shouldApplyHeuristicOrder\":true,\"sessionGranularity\":null}","name":"Product Types","id":"2","layout":"{\"x\":0,\"y\":0,\"w\":24,\"h\":8}"},{"vizState":"{\"query\":{\"measures\":[\"Sale.total\"],\"timeDimensions\":[{\"dimension\":\"Sale.createdAt\",\"granularity\":\"day\"}],\"dimensions\":[\"Customer.firstname\"],\"order\":{\"Sale.total\":\"desc\"}},\"chartType\":\"area\",\"orderMembers\":[{\"id\":\"Sale.total\",\"title\":\"Sale Total\",\"order\":\"desc\"},{\"id\":\"Customer.firstname\",\"title\":\"Customer Firstname\",\"order\":\"none\"},{\"id\":\"Sale.createdAt\",\"title\":\"Sale Created at\",\"order\":\"none\"}],\"pivotConfig\":{\"x\":[\"Sale.createdAt.day\"],\"y\":[\"Customer.firstname\",\"measures\"],\"fillMissingDates\":true,\"joinDateRange\":false},\"shouldApplyHeuristicOrder\":true}","name":"Sale Total","id":"3","layout":"{\"x\":0,\"y\":8,\"w\":24,\"h\":8}"}]
export function getCubeClient(location){
const getDashboardItems = () => {
// return JSON.parse(window.localStorage.getItem("dashboardItems")) || defaultDashboardItems;
return defaultDashboardItems
}
const setDashboardItems = items => {
return window.localStorage.setItem("dashboardItems", JSON.stringify(items));
}
const nextId = () => {
const currentId = parseInt(window.localStorage.getItem("dashboardIdCounter"), 10) || 1;
window.localStorage.setItem("dashboardIdCounter", currentId + 1);
return currentId.toString();
};
const toApolloItem = i => ({ ...i, __typename: "DashboardItem" });
const typeDefs = `
type DashboardItem {
id: String!
layout: String
vizState: String
name: String
}
input DashboardItemInput {
layout: String
vizState: String
name: String
}
type Query {
dashboardItems: [DashboardItem]
dashboardItem(id: String!): DashboardItem
}
type Mutation {
createDashboardItem(input: DashboardItemInput): DashboardItem
updateDashboardItem(id: String!, input: DashboardItemInput): DashboardItem
deleteDashboardItem(id: String!): DashboardItem
}
`;
const schema = makeExecutableSchema({
typeDefs,
resolvers: {
Query: {
dashboardItems() {
const dashboardItems = getDashboardItems();
return dashboardItems.map(toApolloItem);
},
dashboardItem(_, { id }) {
const dashboardItems = getDashboardItems();
return toApolloItem(dashboardItems.find(i => i.id.toString() === id));
}
},
Mutation: {
createDashboardItem: (_, { input: { ...item } }) => {
const dashboardItems = getDashboardItems();
item = { ...item, id: nextId(), layout: JSON.stringify({}) };
dashboardItems.push(item);
setDashboardItems(dashboardItems);
return toApolloItem(item);
},
updateDashboardItem: (_, { id, input: { ...item } }) => {
const dashboardItems = getDashboardItems();
item = Object.keys(item)
.filter(k => !!item[k])
.map(k => ({
[k]: item[k]
}))
.reduce((a, b) => ({ ...a, ...b }), {});
const index = dashboardItems.findIndex(i => i.id.toString() === id);
dashboardItems[index] = { ...dashboardItems[index], ...item };
setDashboardItems(dashboardItems);
return toApolloItem(dashboardItems[index]);
},
deleteDashboardItem: (_, { id }) => {
const dashboardItems = getDashboardItems();
const index = dashboardItems.findIndex(i => i.id.toString() === id);
const [removedItem] = dashboardItems.splice(index, 1);
setDashboardItems(dashboardItems);
return toApolloItem(removedItem);
}
}
}
});
return new ApolloClient({
cache,
uri: "http://localhost:4000",
link: new SchemaLink({
schema
})
});
}
Dashboard.jsx
import { getCubeClient } from './CubeClient';
import { Query } from "react-apollo";
let cubeClient = getCubeClient()
const Dashboard = () => {
const dashboardItem = item => (
<div key={item.id} data-grid={defaultLayout(item)}>
<DashboardItem key={item.id} itemId={item.id} title={item.name}>
<ChartRenderer vizState={item.vizState} />
</DashboardItem>
</div>
);
return(
<Query query={GET_DASHBOARD_ITEMS} client={cubeClient}>
{({ error, loading, data }) => {
if (error) return <div>"Error!"</div>;
if (loading) return (
<div className="alignCenter">
<Spinner color="#be97e8" size={48} sizeUnit="px" />
</div>
);
if (data) {
return (<DashboardView t={translate} dashboardItems={data && data.dashboardItems}>
{data && data.dashboardItems.map(deserializeItem).map(dashboardItem)}
</DashboardView>)
} else {
return <div></div>
}
}}
</Query>
)
};
Explore.jsx
import { useQuery } from "#apollo/react-hooks";
import { withRouter } from "react-router-dom";
import ExploreQueryBuilder from "../components/QueryBuilder/ExploreQueryBuilder";
import { GET_DASHBOARD_ITEM } from "../graphql/queries";
import TitleModal from "../components/TitleModal.js";
import { isQueryPresent } from "#cubejs-client/react";
import PageHeader from "../components/PageHeader.js";
import ExploreTitle from "../components/ExploreTitle.js";
import { PageLayout } from '#gqlapp/look-client-react';
import Helmet from 'react-helmet';
import { translate } from '#gqlapp/i18n-client-react';
import { FontAwesomeIcon } from '#fortawesome/react-fontawesome';
import { faAngleRight, faTrashAlt, faPlusCircle } from '#fortawesome/free-solid-svg-icons';
import settings from '#gqlapp/config';
import PropTypes from 'prop-types';
import { getCubeClient } from './CubeClient';
let cubeClient = getCubeClient()
const Explore = withRouter(({ history, location,t }) => {
const [addingToDashboard, setAddingToDashboard] = useState(false);
const params = new URLSearchParams(location.search);
const itemId = params.get("itemId");
const { loading, error, data } = useQuery(GET_DASHBOARD_ITEM, {
client: cubeClient,
variables: {
id: itemId
},
skip: !itemId
});
Titlemodal.jsx
import React from "react";
import { Modal, Input } from "antd";
import { useMutation } from "#apollo/react-hooks";
import { GET_DASHBOARD_ITEMS } from "../graphql/queries";
import {
CREATE_DASHBOARD_ITEM,
UPDATE_DASHBOARD_ITEM
} from "../graphql/mutations";
import { getCubeClient } from '../containers/CubeClient';
let cubeClient = getCubeClient()
const TitleModal = ({
history,
itemId,
titleModalVisible,
setTitleModalVisible,
setAddingToDashboard,
finalVizState,
setTitle,
finalTitle
}) => {
const [addDashboardItem] = useMutation(CREATE_DASHBOARD_ITEM, {
client: cubeClient,
refetchQueries: [
{
query: GET_DASHBOARD_ITEMS
}
]
});
const [updateDashboardItem] = useMutation(UPDATE_DASHBOARD_ITEM, {
client: cubeClient,
refetchQueries: [
{
query: GET_DASHBOARD_ITEMS
}
]
});
queries and mutations.js
import gql from "graphql-tag";
export const GET_DASHBOARD_ITEMS = gql`
query GetDashboardItems {
dashboardItems {
id
layout
vizState
name
}
}
`;
export const GET_DASHBOARD_ITEM = gql`
query GetDashboardItem($id: String!) {
dashboardItem(id: $id) {
id
layout
vizState
name
}
}
`;
export const CREATE_DASHBOARD_ITEM = gql`
mutation CreateDashboardItem($input: DashboardItemInput) {
createDashboardItem(input: $input) {
id
layout
vizState
name
}
}
`;
export const UPDATE_DASHBOARD_ITEM = gql`
mutation UpdateDashboardItem($id: String!, $input: DashboardItemInput) {
updateDashboardItem(id: $id, input: $input) {
id
layout
vizState
name
}
}
`;
export const DELETE_DASHBOARD_ITEM = gql`
mutation DeleteDashboardItem($id: String!) {
deleteDashboardItem(id: $id) {
id
layout
vizState
name
}
}
`;

react-native redux repopulate the state

That's the component in question. Before the component is mounted, it successfully dispatches an action {this.props.populateGrid()}. Everything is fine, I can see the state in the logger (basically it's a nested array of random numbers). When I press the button, it should rehydrate the state with new random numbers. Yet, I get the following error: Cannot read property 'populateGrid' of undefined.
import React, { Component, PropTypes } from 'react';
import { View, StyleSheet, Button } from 'react-native';
import Grid from './Grid';
import * as globalStyles from '../styles/global';
export default class Body extends Component {
componentWillMount() {
this.refresh();
}
refresh() {
this.props.populateGrid();
}
render() {
return (
<View style={styles.body}>
<Grid inGrid={this.props.grid} />
<Button
onPress={this.refresh}
title={'Regenerate the Grid'}
/>
</View>
);
}
}
Container:
import { bindActionCreators } from 'redux';
import { connect } from 'react-redux';
import { listNumbers, pickNumber } from '../actions/numberActions';
import { populateRow, populateGrid } from '../actions/gridActions';
import Body from '../components/Body';
const mapStateToProps = state => ({
numbers: state.numbers,
grid: state.grid
});
const mapDispatchToProps = dispatch => (
bindActionCreators({
listNumbers,
pickNumber,
populateRow,
populateGrid
}, dispatch)
);
export default connect(
mapStateToProps,
mapDispatchToProps
)(Body);
Action:
import { POPULATE_ROW, POPULATE_GRID } from './actionTypes';
import { randNumbers, randGrid } from '../utils/generators';
export const populateRow = (n) => {
return {
type: POPULATE_ROW,
payload: randNumbers(n)
};
};
export const populateGrid = () => {
return {
type: POPULATE_GRID,
payload: randGrid()
};
};
reducer:
import { POPULATE_ROW, POPULATE_GRID } from '../actions/actionTypes';
export default (state = [], action = {}) => {
switch (action.type) {
case POPULATE_ROW:
return action.payload || [];
case POPULATE_GRID:
return action.payload || [];
default:
return state;
}
};
Generators of numbers (it's the second function in this case)
export const randNumbers = (n) => {
let numbers = new Array(n);
const shuffled = [];
// fill one array with the numbers 1-10
numbers = numbers.fill(1).map((_, i) => i + 1);
// shuffle by taking a random element from one array
// and pushing it to the other array
while (numbers.length) {
const idx = numbers.length * Math.random() | 0; // floor trick
shuffled.push(numbers[idx]);
numbers.splice(idx, 1);
}
return shuffled;
};
export const randGrid = () => {
const shuffled = randNumbers(6);
const array = shuffled.map(a => {
let r = new Array(6);
r = [a, ...randNumbers(5)];
return r;
});
return array;
};
I think you need to bind this to your refresh method in your onClick handler, so that this is set properly when refresh executes:
<Button
onPress={this.refresh.bind(this)}
title={'Regenerate the Grid'}
/>
Hope that helps!

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