javascript - How do I handle multiple calls in one thunk function? -


i don’t know if has read this: https://medium.com/@stowball/a-dummys-guide-to-redux-and-thunk-in-react-d8904a7005d3?source=linkshare-36723b3116b2-1502668727 teaches how handle one api requests redux , redux thunk. it’s great guide, wonder if react component having more 1 request server? this:

componentdidmount() {     axios.get('http://localhost:3001/customers').then(res => {       this.setstate({         res,         customer: res.data       })     })      axios.get('http://localhost:3001/events').then(res => {       this.setstate({         res,         event: res.data       })     })      axios.get('http://localhost:3001/locks').then(res => {       this.setstate({         res,         lock: res.data       })     })   }

i've been googling crazy , think i've made progress, action creator looks (don't know if 100% correct):

const fetchdata = () => async dispatch => {   try {     const customers = await axios.get(`${settings.hostname}/customers`)       .then(res) => res.json()      const events = await axios.get(`${settings.hostname}/events`)       .then(res) => res.json()      const locks = await axios.get(`${settings.hostname}/locks`)       .then(res) => res.json()      dispatch(setcustomers(customers))     dispatch(setevents(events))     dispatch(setlocks(locks))   } catch(err) => console.log('error', err) }

so next step create reducers, made one:

export function events(state = initialstate, action) {     switch (action.type) {         case 'events_fetch_data_success':             return action.events;         default:             return state;     } }

here's problem:

i don't know how handle inside of component now. if follow article ( https://medium.com/@stowball/a-dummys-guide-to-redux-and-thunk-in-react-d8904a7005d3?source=linkshare-36723b3116b2-1502668727) end this:

componentdidmount() {   this.props.fetchdata('http://localhost:3001/locks') }

and

    doors.proptypes = {   fetchdata: proptypes.func.isrequired,   doors: proptypes.object.isrequired }  const mapstatetoprops = state => {   return {     doors: state.doors   } }  const mapdispatchtoprops = dispatch => {   return {     fetchdata: url => dispatch(doorsfetchdata(url))   } }  export default connect(mapstatetoprops, mapdispatchtoprops)(doors)

my question

so question how should handle multiple requests inside of component now? sorry if questions seems lazy, can't figure out , i've been trying to.

all super appreciated!!

assuming request not depend on each other, suggest keeping each action separate. possible benefits of approach:

  • easier debugging
  • easier testing
  • closer single responsibility principle

suggested implementation

actions:

const fetchcustomers = () => dispatch => {   try {     axios.get(`${settings.hostname}/customers`)       .then(res => {            dispatch(setcustomers(res.json()))        })    } catch(err) => console.log('error', err) }  const fetchevents = () => dispatch => {   try {     axios.get(`${settings.hostname}/events`)       .then(res => {            dispatch(setevents(res.json()))        })    } catch(err) => console.log('error', err) }  const fetchlocks = () => dispatch => {   try {     axios.get(`${settings.hostname}/locks`)       .then(res => {            dispatch(setlocks(res.json()))        })   } catch(err) => console.log('error', err) }

doors component snippet:

import * actioncreators './actions.js'  import { bindactioncreators } 'redux' /*...*/ componentdidmount() {     this.props.fetchcustomers();     this.props.fetchevents();     this.props.fecthlocks();   }  const mapstatetoprops = state => {   return {     customers: state.doors.customers,     events: state.doors.events,     locks: state.doors.locks   } }  const mapdispatchtoprops = dispatch => {   return bindactioncreators(actioncreators, dispatch); }  export default connect(mapstatetoprops, mapdispatchtoprops)(doors)

edit: added example reducer , adopted mapstatetoprops accordingly. in reducer instance doors container's state , holds events, locks , customers:

export function events(state = initialstate, action) {     switch (action.type) {         case 'events_fetch_success':             return object.assign({}, state, {events: action.events});         case 'customers_fetch_success':             return object.assign({}, state, {customers: action.customers});         case 'locks_fetch_success':             return object.assign({}, state, {locks: action.locks});         default:             return state;     } }

now requests executed in parallel , they fail independently.


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