redux saga fetch data
//EXAMPLE FETCH DATA API REDUX SAGA
// USER ACTION CREATOR
export const REQUEST_API_DATA = 'REQUEST_API_DATA'
export const RECEIVE_API_DATA = 'RECEIVE_API_DATA'
export const requestApiData = () => ({ type: REQUEST_API_DATA })
// USER REDUCER
import { REQUEST_API_DATA, RECEIVE_API_DATA } from '../actions/user'
export default (state = {}, { type, payload }) => {
switch (type) {
case RECEIVE_API_DATA:
return payload.users
default:
return state
}
}
// USER SAGA
import axios from 'axios'
import { call, put, takeEvery, takeLatest } from 'redux-saga/effects'
import { REQUEST_API_DATA, RECEIVE_API_DATA } from './actions/user'
function* userReceiveAll(action) {
try {
const { data } = yield call(axios.get, 'https://jsonplaceholder.typicode.com/users')
yield put({ type: RECEIVE_API_DATA, payload: { users: data } })
} catch (e) {
console.log(e.message)
}
}
export default function* userSendAll() {
yield takeLatest(REQUEST_API_DATA, getApiData)
}
// REDUX STORE
import { createStore, applyMiddleware, combineReducer } from 'redux'
import createSagaMiddleware from 'redux-saga'
import { all } from 'redux-saga/effects'
import logger from 'redux-logger'
import userReducer from './reducers/user'
import userSaga from './sagas/user'
function* saga() {
yield all([userSaga()])
}
export const store = () => {
const sagaMiddleware = createSagaMiddleware()
const store = createStore(combineReducer({users: userReducer}),
applyMiddleware(sagaMiddleware, logger))
sagaMiddleware.run(saga)
return store;
}
// USER COMPONENT
import React from 'react'
import { connect } from 'react-redux'
import { requestApiData } from './actions'
class User extends React.Component {
componentDidMount() {
this.props.fetchAll()
}
render() {
const { users } = this.props.state
const results = users.length > 0 ? users : []
return (
<div>
{results.map((v) => (
<ul key={v.id}>
<li>{v.username}</li>
</ul>
))}
</div>
)
}
}
const mapStateToProps = (state) => ({ state })
const mapDispatchToProps = (dispatch) => ({ fetchAll: () => dispatch(requestApiData()) })
export default connect(mapStateToProps, mapDispatchToProps)(User)