I'm trying to set pagination on page with dynamic input setting of the pageSize
using redux-form library, I set pageSize using selectors and mapping them into props,
but in order to set pagination I'm in need of that pageSize value in my other reducer (
not form reducer ), and I cant get how to access it
// Reducer
import { FETCH, SHOW_GRID, SHOW_LIST, SET_PAGINATION } from "./types";
import { data } from "../data";
const initialData = {
fetchedData: data,
listSelected: true,
pageSizeOptions: [4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16],
};
export default function (state = initialData, action) {
switch (action.type) {
case SHOW_GRID:
return {
...state,
listSelected: false,
};
case SHOW_LIST:
return {`enter code here`
...state,
listSelected: true,
};
case SET_PAGINATION:
console.log(??)
default:
return state;
}
}
// actions
import { FETCH, SHOW_GRID, SHOW_LIST, SET_PAGINATION } from "./types";
export function fetch() {
return {
type: FETCH,
};
}
export function showGrid() {
return {
type: SHOW_GRID,
};
}
export function showList() {
return {
type: SHOW_LIST,
};
}
export function setPagination() {
return {
type: SET_PAGINATION,
};
}
// The component itself
import React, { Component } from "react";
import { reduxForm, Field, formValueSelector } from "redux-form";
import { connect } from "react-redux";
import { getFormValues } from "redux-form";
import { setPagination } from "../store/actions";
class PageSize extends Component {
render() {
const pageSizeOptions = [4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
return (
<Field
component="select"
name="pageSize"
defaultValue={4}
onChange={setPagination}
>
{pageSizeOptions.map((val) =>
val == this.props.pageSize ? (
<option name={val} value={val} selected>
{val}
</option>
) : (
<option value={val}>{val}</option>
)
)}
</Field>
);
}
}
export const ReduxFormComponent = reduxForm({
form: "pageSize",
})(PageSize);
const mapStateToProps = (state) => {
const selector = formValueSelector("pageSize");
const selectedPageSize = selector(state, "pageSize");
return {
pageSize: selectedPageSize,
};
};
const mapDispatchToProps = {
setPagination,
};
const component = connect(
mapStateToProps,
mapDispatchToProps
)(ReduxFormComponent);
export default connect((state) => ({
values: getFormValues("pageSize")(state),
}))(component);
Related
I am adding "add to cart" feature to the eCommerce site using redux-toolkit. I am also using local storage and thunk but it is not working. Products are not added to the cart. Nothing shows on the console. What is wrong with this code?
Here is the CartSlice.js code
import { createSlice } from "#reduxjs/toolkit";
import axios from "axios";
const cartItemsFromStorage = localStorage.getItem("cartItems")
? JSON.parse(localStorage.getItem("cartItems"))
: [];
const initialState = {
cartItems: cartItemsFromStorage,
};
export const cartSlice = createSlice({
name: "cartPage",
initialState,
reducers: {
addItem(state, action) {
const item = action.payload;
const existItem = state.cartItems.find((x) => x.product === item.product);
if (existItem) {
return {
...state,
cartItems: state.cartItems.map((x) =>
x.product === existItem.product ? item : x
),
};
} else {
return {
...state,
cartItems: [...state.cartItems, item],
};
}
},
},
});
export const { addItem } = cartSlice.actions;
export default cartSlice.reducer;
export function addToCart(id, qty) {
return async function addToCartThunk(dispatch, getState) {
try {
const { data } = await axios.get(`/api/products/${id}`);
dispatch(
addItem({
product: data._id,
name: data.name,
image: data.image,
price: data.price,
countInStock: data.countInStock,
qty,
})
);
localStorage.setItem("cartItems", JSON.stringify(getState.cart));
} catch (error) {
console.log(error);
}
};
}
Here is the Store.js code
import { configureStore } from "#reduxjs/toolkit";
import productReducer from "./productSlice";
import productDetailReducer from "./productDetailSlice";
import cartReducer from "./cartSlice";
const store = configureStore({
reducer: {
productList: productReducer,
productDetails: productDetailReducer,
cartPage: cartReducer,
},
});
export default store;
Here is the CartScreen.js code
import React from "react";
import { Link } from "react-router-dom";
import { useEffect } from "react";
import { useLocation, useNavigate, useParams } from "react-router-dom";
import { useDispatch, useSelector } from "react-redux";
import { addToCart } from "../store/cartSlice";
const EMPTY_CART = { cartItems: [] };
const CartScreen = () => {
const { productId } = useParams();
const location = useLocation();
const qty = location.search ? Number(location.search.split("=")[1]) : 1;
const dispatch = useDispatch();
const cart = useSelector((state) => state.cart || EMPTY_CART);
const { cartItems } = cart;
console.log(cartItems);
useEffect(() => {
if (productId) {
dispatch(addToCart(productId, qty));
}
}, [dispatch, productId, qty]);
return <div>Cart Page</div>;
};
export default CartScreen;
Getting This Error When i use a useSelector hook to fetch data.
Im getting initial state undefined which cause the error.
selector.ts
import { createSelector } from '#reduxjs/toolkit';
import { RootState } from 'types';
import { initialState } from '.';
const selectSlice = (state: RootState) => state.initialLoad || initialState;
export const selectInitialLoad = createSelector([selectSlice], state => state);
index.ts
import { PayloadAction } from '#reduxjs/toolkit';
import { createSlice } from 'utils/#reduxjs/toolkit';
import { useInjectReducer, useInjectSaga } from 'utils/redux-injectors';
import { initialLoadSaga } from './saga';
import { InitialLoadState, RepoErrorType } from './types';
export const initialState: InitialLoadState = {
name: 'initial-load',
layouts: [],
loading: false,
error: null,
};
const slice = createSlice({
name: 'initialLoad',
initialState,
reducers: {
loadLayout(state) {
state.loading = true;
state.error = null;
state.layouts = [];
},
layoutLoaded(state, action: PayloadAction<[]>) {
const repos = action.payload;
state.layouts = repos;
state.loading = false;
},
layoutError(state, action: PayloadAction<string | RepoErrorType>) {
state.error = 'error';
state.loading = false;
},
},
});
export const { actions: appLayoutActions } = slice;
export const useAppLayoutSlice = () => {
useInjectReducer({ key: slice.name, reducer: slice.reducer });
useInjectSaga({ key: slice.name, saga: initialLoadSaga });
return { actions: slice.actions };
};
types.ts
/* --- STATE --- */
export interface InitialLoadState {
name: string;
loading: boolean;
error?: RepoErrorType | string | null;
layouts: [];
}
export enum RepoErrorType {
RESPONSE_ERROR = 1,
USER_NOT_FOUND = 2,
USERNAME_EMPTY = 3,
USER_HAS_NO_REPO = 4,
GITHUB_RATE_LIMIT = 5,
}
/*
If you want to use 'ContainerState' keyword everywhere in your feature folder,
instead of the 'InitialLoadState' keyword.
*/
export type ContainerState = InitialLoadState;
reducers.ts
/**
* Combine all reducers in this file and export the combined reducers.
*/
import { combineReducers } from '#reduxjs/toolkit';
import { InjectedReducersType } from 'utils/types/injector-typings';
/**
* Merges the main reducer with the router state and dynamically injected reducers
*/
export function createReducer(injectedReducers: InjectedReducersType = {}) {
// Initially we don't have any injectedReducers, so returning identity function to avoid the error
if (Object.keys(injectedReducers).length === 0) {
return state => state;
} else {
return combineReducers({
...injectedReducers,
});
}
}
this is my configuerStore.ts
/**
* Create the store with dynamic reducers
*/
import {
configureStore,
getDefaultMiddleware,
StoreEnhancer,
} from '#reduxjs/toolkit';
import { createInjectorsEnhancer } from 'redux-injectors';
import createSagaMiddleware from 'redux-saga';
import { createReducer } from './reducers';
export function configureAppStore() {
const reduxSagaMonitorOptions = {};
const sagaMiddleware = createSagaMiddleware(reduxSagaMonitorOptions);
const { run: runSaga } = sagaMiddleware;
// Create the store with saga middleware
const middlewares = [sagaMiddleware];
const enhancers = [
createInjectorsEnhancer({
createReducer,
runSaga,
}),
] as StoreEnhancer[];
const store = configureStore({
reducer: createReducer(),
middleware: [...getDefaultMiddleware(), ...middlewares],
devTools: process.env.NODE_ENV !== 'production',
enhancers,
});
return store;
}
work around
adding a condition to state
import { createSelector } from '#reduxjs/toolkit';
import { RootState } from 'types';
import { initialState } from '.';
const selectSlice = (state: RootState) => state && state.initialLoad || initialState;
export const selectInitialLoad = createSelector([selectSlice], state => state);
most of the files are of create react app boilerplate not change.
i tried the same on the cra boilerplate template without clean setup and it worked fine but after clean and setup it doesnt work how i need it too
Please define initialLoad into /src/types/RootState.ts
Example here
I'm trying to achieve infinite scrolling using ag grid react component, but it doesn't seems to be working.
here is my implementation :
import { AgGridReact } from 'ag-grid-react';
import 'ag-grid/dist/styles/ag-grid.css';
import 'ag-grid/dist/styles/ag-theme-balham.css';
class TasksGridContainer extends React.Component {
constructor(props) {
super(props);
this.state = {
loading: true,
gridOptions: {
//virtual row model
rowModelType: 'infinite',
paginationPageSize: 100,
cacheOverflowSize: 2,
maxConcurrentDatasourceRequests: 2,
infiniteInitialRowCount: 1,
maxBlocksInCache: 2,
components: {
loadingRenderer: function(params) {
console.log('loadingCellRenderer', params);
if (params.value !== undefined) {
return params.value;
} else {
return '<img src="https://raw.githubusercontent.com/ag-grid/ag-grid-docs/master/src/images/loading.gif">';
}
}
},
defaultColDef: {
editable: false,
enableRowGroup: true,
enablePivot: true,
enableValue: true
}
}
};
}
componentDidMount() {
this.props.actions.getAssignedTasks();
this.props.actions.getTeamTasks();
}
componentWillReceiveProps(newProps) {
if (this.props.taskView.taskGrid.listOfTasks.length > 0) {
this.setState({
loading: false ,
gridOptions: {
datasource: this.props.taskView.taskGrid.listOfTasks
}
});
}
}
render() {
return (
<div id="tasks-grid-container">
<div style={Style.agGrid} id="myGrid" className="ag-theme-balham">
<AgGridReact
columnDefs={this.props.taskView.taskGrid.myTaskColumns}
rowData={this.props.taskView.taskGrid.listOfTasks}
gridOptions={this.state.gridOptions}>
</AgGridReact>
</div>
</div>
);
}
}
TasksGridContainer.propTypes = {
listOfTasks: PropTypes.array,
actions: PropTypes.object
};
const mapStateToProps = ({ taskView }) => {
return {
taskView: {
taskGrid: {
listOfTasks: taskView.taskGrid.listOfTasks,
myTaskColumns: taskView.taskGrid.myTaskColumns,
teamTaskColumns: taskView.taskGrid.teamTaskColumns
}
}
}
};
const mapDispatchToProps = (dispatch) => {
return {
actions: bindActionCreators(taskGridActions, dispatch)
};
}
module.exports = connect(mapStateToProps, mapDispatchToProps)(TasksGridContainer);
columnDefs are being set once props.taskView.taskGrid.myTaskColumns is available.
a sample columndef:
[
{
cellRenderer: "loadingRenderer", checkboxSelection: true, field: "action", headerCheckboxSelection: true, headerCheckboxSelectionFilteredOnly: true, headerName: "Action"
},
{
"activity"headerName: "Activity Name"
}
]
Although grid is loading fine, but when i scroll it should call "loadingRenderer" component. But,I'm not able to see any loading gif when i scroll.
Am i doing something wrong in implementation?
Actual issue was not calling the the props properly and was not having onGridReady function to use gridAPi.
I modified the code and it starts working:
<AgGridReact
components={this.state.components}
enableColResize={true}
rowBuffer={this.state.rowBuffer}
debug={true}
rowSelection={this.state.rowSelection}
rowDeselection={true}
rowModelType={this.state.rowModelType}
paginationPageSize={this.state.paginationPageSize}
cacheOverflowSize={this.state.cacheOverflowSize}
maxConcurrentDatasourceRequests={this.state.maxConcurrentDatasourceRequests}
infiniteInitialRowCount={this.state.infiniteInitialRowCount}
maxBlocksInCache={this.state.maxBlocksInCache}
columnDefs={this.props.columns}
rowData={this.props.rowData}
onGridReady={this.onGridReady}
>
</AgGridReact>
state :
this.state = {
components: {
loadingRenderer: function(params) {
if (params.value !== undefined) {
return params.data.action;
} else {
return '<img src="https://raw.githubusercontent.com/ag-grid/ag-grid-docs/master/src/images/loading.gif">';
}
}
},
rowBuffer: 0,
rowSelection: "multiple",
rowModelType: "infinite",
paginationPageSize: 100,
cacheOverflowSize: 2,
maxConcurrentDatasourceRequests: 2,
infiniteInitialRowCount: 1,
maxBlocksInCache: 2
};
onGridReady function :
onGridReady = (params, data = []) => {
this.gridApi = params;
this.gridColumnApi = params.columnApi;
this.updateData(params,data);
}
I'm trying to connect the react-widgets DropdownList component to global redux store.
The DropdownList changes the value of the selected value if it is obtained from the this.state.
In the sample from the react-widgets docs in the onChange handler:
var DropdownList = ReactWidgets.DropdownList
, colors = ['orange', 'red', 'blue', 'purple'];
var Example = React.createClass({
getInitialState() {
return { value: colors[3] };
},
render() {
return (
<DropdownList
data={colors}
value={this.state.value}
onChange={value => this.setState({ value })}/>)
}
});
ReactDOM.render(<Example/>, mountNode);
But I want to set DropdownList value from the global redux store my codepen example:
const colors = [
{ id: 0, name: 'orange'},
{ id: 1, name: 'purple'},
{ id: 2, name: 'red' },
{ id: 3, name: 'blue' },
{ id: 4, name: 'green' }
];
class App extends React.Component {
componentWillMount() {
this.props.setSelectedColor(colors[1]); // !!! HELP, does not work !!!
}
render() {
return(
<DropdownList className="form-control form-control-sm"
id="color-list"
valueField="id"
textField="name"
data={colors}
value={this.props.selectedColor}
onChange={(value) => this.props.setSelectedColor(value)}
/>);
}
}
const reducers = {
list: setSelectedColor
};
// global redux state <-> store
const store = createStore(rootReducer);
// connect to global redux store selectedColor
function mapStateToProps (state) {
return {
selectedColor: state.selectedColor
}
}
// connect to global actions (setColor) to redux store
function mapDispatchToProps(dispatch) {
return {
setSelectedColor: bindActionCreators(setColor, dispatch)
}
}
const AppForm = connect(
mapStateToProps,
mapDispatchToProps
)(App);
ReactDOM.render(
<Provider store={store}>
<AppForm />
</Provider>,
document.getElementById('app')
);
In the method componentWillMount() I set the initial value list in the second element (purple) but it does not work!
What am I doing wrong?
I corrected the path connection state through reducer "list":
const reducers = {
list: setSelectedColor
};
function mapStateToProps (state) {
return {
selectedColor: state.list.selectedColor
}
}
Hooray, now it works!
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!