Probably something simple...I know I am missing something...
My user id is returning as the key instead of the value. This is a test to see what was returned from the api call.
actionCreator
import * as actions from "./types";
import axios from "axios";
export const userDashBoard = userId => dispatch => {
axios.post("/api/authpages/dashboard", userId).then(user => {
dispatch({
type: actions.GET_PROFILE,
payload: user.data
});
});
};
Reducer
import { GET_PROFILE, CLEAR_PROFILE } from "../actions/types";
const INITIAL = {};
export default (state = INITIAL, action) => {
switch (action.type) {
case GET_PROFILE:
return { ...state, profileData: action.payload };
case CLEAR_PROFILE:
return { ...state, profile: "" };
default:
return state;
}
};
API
router.post("/dashboard", (req, res) => {
res.json(req.body);
});
What I get from the return in Redux
This should be an image of the redux result
I know that the api should return req.body.userId, but when I do that I get nothing. The only way I can get a response is to just call req.body...
Any help would be great...Thank you!
Related
My react app uses a redux connected component to render data from backend for a project page, so I called a GET dispatch inside a React Hook useEffect to make sure data is always rendered when the project page first open, and whenever there is a change in state project, the component will be updated accordingly using connect redux function. However, the component doesn't update after I reduce the new state using a DELETE API request, only if I dispatch another GET request then the state will be updated. So I have to call 2 dispatches, one for DELETE and one for GET to get the page updated synchronously (as you can see in handleDeleteUpdate function), and the same thing happened when I dispatch a POST request to add an update (in handleProjectUpdate). Only when I reload the page, the newly changed data will show up otherwise it doesn't happen synchronously, anyone knows what's wrong with the state update in my code? and how can I fix this so the page can be loaded faster with only one request?
I've changed the reducer to make sure the state is not mutated and is updated correctly.
I have also tried using async function in handleDeleteUpdate to make sure the action dispatch is finished
I have tried
console.log(props.project.data.updates)
to print out the updates list after calling props.deleteUpdate but it seems the updates list in the state have never been changed, but when I reload the page, the new updates list is shown up
Here is the code I have for the main connected redux component, actions, and reducers file for the component
function Project(props) {
let options = {year: 'numeric', month: 'long', day: 'numeric', hour: '2-digit', minute: '2-digit'}
const {projectID} = useParams();
const history = useHistory();
console.log(props.project.data? props.project.data.updates : null);
console.log(props.project.data);
// const [updates, setUpdates] = useState(props.project.data? props.project.data.updates : null)
useEffect(() => {
props.getProject(projectID);
}, []);
// Add an update to project is handled here
const handleProjectUpdate = async (updateInfo) => {
await props.postProjectUpdate(projectID, updateInfo)
await props.getProject(projectID);
}
const handleDeleteUpdate = async (updateID) => {
await props.deleteUpdate(projectID, updateID);
await props.getProject(projectID);
console.log(props.project.data.updates);
};
return (
<div>
<Navbar selected='projects'/>
<div className = "project-info-layout">
<UpdateCard
updates = {props.project.data.updates}
handleProjectUpdate = {handleProjectUpdate}
handleDeleteUpdate = {handleDeleteUpdate}
options = {options}
/>
</div>
</div>
)
}
const mapStateToProps = state => ({
project: state.project.project,
});
export default connect(
mapStateToProps,
{getProject, postProjectUpdate, deleteUpdate}
)(Project);
ACTION
import axios from 'axios';
import { GET_PROJECT_SUCCESS,ADD_PROJECT_UPDATE_SUCCESS, DELETE_PROJECT_UPDATE_SUCCESS} from './types';
let token = localStorage.getItem("token");
const config = {
headers: {
Authorization: `Token ${token}`,
}
};
export const getProject = (slug) => dispatch => {
axios.get(`${backend}/api/projects/` + slug, config)
.then(
res => {
dispatch({
type: GET_PROJECT_SUCCESS,
payload: res.data,
});
},
).catch(err => console.log(err));
}
export const postProjectUpdate = (slug, updateData) => dispatch => {
axios.post(`${backend}/api/projects/`+slug+ `/updates`,updateData, config)
.then(
res => {
dispatch({
type: ADD_PROJECT_UPDATE_SUCCESS,
payload: res.data,
});
},
).catch(err => console.log(err));
}
export const deleteUpdate = (slug, updateID) => dispatch => {
axios.delete(`${backend}/api/projects/`+ slug + `/updates/`+ updateID, config)
.then(
res => {
dispatch({
type: DELETE_PROJECT_UPDATE_SUCCESS,
payload: updateID,
});
},
).catch(err => console.log(err));
}
Reducer
import { GET_PROJECT_SUCCESS,ADD_PROJECT_UPDATE_SUCCESS, DELETE_PROJECT_UPDATE_SUCCESS} from "../actions/types";
const initialState = {
project: {},
};
export default function ProjectReducer(state = initialState, action) {
const { type, payload } = action;
switch (type) {
case GET_PROJECT_SUCCESS:
return {
...state, // return all initial state
project: payload
};
case ADD_PROJECT_UPDATE_SUCCESS:
return {
...state,
project: {
...state.project,
updates: [...state.project.data.updates, payload.data]
}
};
case DELETE_PROJECT_UPDATE_SUCCESS:
let newUpdatesArray = [...state.project.updates]
newUpdatesArray.filter(update => update.uuid !== payload)
return {
...state,
project: {
...state.project,
members: newUpdatesArray
}
};
default:
return state;
}
}
updateCard in the Project component is showing a list of all updates
app.js
const mapStateToProps = (state) => {
return {home:state}
}
const mapDispatchToProps = (dispatch) => {
return {
guestLogin: (data)=>{dispatch(guestLogin(data)).then(()=>{
dispatch(initiateTrans(stateProps.home))
})},
};
}
const mergeProps = (stateProps, dispatchProps, ownProps) => {
return Object.assign({}, ownProps, stateProps, dispatchProps,{
initiateTrans: () => dispatchProps.initiateTrans(stateProps.home),
})
}
Action.js
export const guestLogin= (state)=>{
var data={
'email':state.email,
'name':state.name,
'phone_number':state.ph_number,
'phone_code':state.country_code
}
return function(dispatch) {
return dataservice.guestSignup(data).then(res => {
dispatch(afterLoggedGuest(res))
}).catch(error => {
throw(error);
});
}
}
function afterLoggedGuest(result) {
return {type: guestLoginChange, result};
}
export const initiateTrans= (updatedState)=>{
return function(dispatch) {
return dataservice.initiateTransaction(updatedState).then(res => {
console.log("initiateTransaction",res)
}).catch(error => {
throw(error);
});
}
}
Reducer.js
if(action.type === guestLoginChange){
return {
...state,guestData: {
...state.guestData,
Authorization: action.result.authentication ,
auth_token: action.result.auth_token ,
platform: action.result.platform
} ,
}
}
I am having two api requests.. After first api request success i want to update state value then pass that updated state to another api request..
I tried to get the updted props
how to dispatch the initiateTrans with update props
I need to update value at api request success in call back i need to call one more request with updated state value
currently i am not able to get the update props value
I think this is a good use case for thunk (redux-thunk), which is a middleware that allows you to execute multiple dispatches in an action.
You will need to apply the middleware when you configure the initial store (see docs on link above). But then in your actions, you can wrap the code with a dispatch return statement, which gives you access to multiple calls. For example:
export const guestLogin= (state)=>{
return dispatch => {
var data={...} // some data in here
return dataservice.guestSignup(data).then(res => {
dispatch(afterLoggedGuest(res))
}).catch(error => {
throw(error);
// could dispatch here as well...
});
}
}
I’ve created some React files where one initializes a Redux store. However, I really need to load some data from a json file before store is initialized.
I’ve tried to import a script loading the json structure then assigning it to the createStore initialState value. But createStore runs before the data is loaded and assigned.
Is there any simple way to say “dont do anything before my axios call is done”???
Action types
actiontypes.js
export const LOAD_DATA_REQUEST='LOAD_DATA_REQUEST';
export const LOAD_DATA_SUCCESS='LOAD_DATA_SUCCESS';
export const LOAD_DATA_ERROR='LOAD_DATA_ERROR';
Actions
actions.js
import * as Actions from './actiontypes';
function load() {
return { type: Actions.LOAD_DATA_REQUEST };
}
function success(res) {
return { type: Actions.LOAD_DATA_SUCCESS, payload: res };
}
function error(ex) {
return { type: Actions.LOAD_DATA_ERROR, payload: ex };
}
export function loadData(url) {
return (dispatch) => {
dispatch(load());
axios.get(url).then((res) => {
dispatch(success(res));
}).catch((ex) => {
dispatch(error(ex));
});
};
}
use this in reducers that requires
import * as Actions from './actiontypes';
const newState = Object.assign({}, state);
switch (action.type) {
case Actions.LOAD_DATA_REQUEST:
{
//maybe you load
newState.loading = true;
return newState;
}
case Actions.LOAD_DATA_SUCCESS:
{
const res = action.payload;
//do what you need for this reducer
return newState;
}
case Actions.LOAD_DATA_ERROR:{
/// maybe you will want to show some error message in some reducer?
return newState;
}
}
You just need the first screen of your application on componentWillMount() call the loadData() action
I hope this can help you
I just get to experiment with Redux and I know that middleware is essential to make ajax calls. I've installed redux-thunk and axios package separately and tried to hook my result as a state and render the ajax result to my component. However my browser console displays an error and my reducer couldn't grab the payload.
The error:
Uncaught Error: Actions must be plain objects. Use custom middleware for async actions.
This is part of my code and how the middleware is hooked up:
//after imports
const logger = createLogger({
level: 'info',
collapsed: true,
});
const router = routerMiddleware(hashHistory);
const enhancer = compose(
applyMiddleware(thunk, router, logger),
DevTools.instrument(),
persistState(
window.location.href.match(
/[?&]debug_session=([^&]+)\b/
)
)
// store config here...
my action:
import axios from 'axios';
export const SAVE_SETTINGS = 'SAVE_SETTINGS';
const url = 'https://hidden.map.geturl/?with=params';
const request = axios.get(url);
export function saveSettings(form = {inputFrom: null, inputTo: null}) {
return (dispatch) => {
dispatch(request
.then((response) => {
const alternatives = response.data.alternatives;
var routes = [];
for (const alt of alternatives) {
const routeName = alt.response.routeName;
const r = alt.response.results;
var totalTime = 0;
var totalDistance = 0;
var hasToll = false;
// I have some logic to loop through r and reduce to 3 variables
routes.push({
totalTime: totalTime / 60,
totalDistance: totalDistance / 1000,
hasToll: hasToll
});
}
dispatch({
type: SAVE_SETTINGS,
payload: { form: form, routes: routes }
});
})
);
}
}
reducer:
import { SAVE_SETTINGS } from '../actions/configure';
const initialState = { form: {configured: false, inputFrom: null, inputTo: null}, routes: [] };
export default function configure(state = initialState, action) {
switch (action.type) {
case SAVE_SETTINGS:
return state;
default:
return state;
}
}
you can see the state routes has size of 0 but the action payload has array of 3.
Really appreciate any help, thanks.
It looks like you have an unnecessary dispatch in your action, and your request doesn't look to be instantiated in the correct place. I believe your action should be:
export function saveSettings(form = { inputFrom: null, inputTo: null }) {
return (dispatch) => {
axios.get(url).then((response) => {
...
dispatch({
type: SAVE_SETTINGS,
payload: { form: form, routes: routes }
});
});
};
}
For all I know, I have to write request in action create. How to use a promise in action for submitting a request? I am getting data in action. Then new state is created in reducer. Bind action and reducer in connect. But I don't know how to use promise for request.
Action
import $ from 'jquery';
export const GET_BOOK = 'GET_BOOK';
export default function getBook() {
return {
type: GET_BOOK,
data: $.ajax({
method: "GET",
url: "/api/data",
dataType: "json"
}).success(function(data){
return data;
})
};
}
Reducer
import {GET_BOOK} from '../actions/books';
const booksReducer = (state = initialState, action) => {
switch (action.type) {
case GET_BOOK:
return state;
default:
return state;
}
};
export default booksReducer;
Container
How display data in container?
import React, { Component, PropTypes } from 'react';
import { connect } from 'react-redux';
import getBook from '../actions/books';
import Radium from 'radium';
import {Link} from 'react-router';
function mapStateToProps(state) {
return {
books: state.data.books,
};
}
function mapDispatchToProps(dispatch) {
return {
getBooks: () => dispatch(getBook()),
};
}
#Radium
#connect(mapStateToProps, mapDispatchToProps)
class booksPage extends Component {
static propTypes = {
getBooks: PropTypes.func.isRequired,
books: PropTypes.array.isRequired,
};
render() {
const {books} = this.props;
return (
<div>
<Link to={`/authors`}><MUIButton style="flat">All Authors</MUIButton></Link>
<ul>
{books.map((book, index) =>
<li key={index}>
<Link to={`/book/${book.name}`}><MUIButton style="flat"><div class="mui--text-black mui--text-display4">
"{book.name}"</div></MUIButton></Link>
<Link to={`/author/${book.author}`}><MUIButton style="flat"><div class="mui--text-black mui--text-display4">
{book.author}</div></MUIButton></Link>
</li>
)}
</ul>
</div>
);
}
}
export default booksPage;
Since you are already using redux you can apply redux-thunk middleware which allows you to define async actions.
Installation & usage: Redux-thunk
export function fetchBook(id) {
return dispatch => {
dispatch(setLoadingBookState()); // Show a loading spinner
fetch(`/book/${id}`, (response) => {
dispatch(doneFetchingBook()); // Hide loading spinner
if(response.status == 200){
dispatch(setBook(response.json)); // Use a normal function to set the received state
}else {
dispatch(someError)
}
})
}
}
function setBook(data) {
return { type: 'SET_BOOK', data: data };
}
You should use Async Actions described in Redux Documentation
Here an example of reducer for async action.
const booksReducer = (state = {}, action) => {
switch (action.type) {
case 'RESOLVED_GET_BOOK':
return action.data;
default:
return state;
}
};
export default booksReducer;
and then you create your Async Action.
export const getBook() {
return fetch('/api/data')
.then(response => response.json())
.then(json => dispatch(resolvedGetBook(json)))
}
export const resolvedGetBook(data) {
return {
type: 'RESOLVED_GET_BOOK',
data: data
}
}
Several Notes:
We could return Promise (instead of Object) in action by using redux-thunk middleware.
Don't use jQuery ajax library. Use other library specifically for doing that (e.g. fetch()). I use axios http client.
Remember, in redux you only use pure function in reducer. Don't make ajax call inside reducer.
Read the complete guide from redux docs.
You should be able to use dispatch inside the callback (if you pass it as an argument):
export default function getBook(dispatch) {
$.ajax({
method: "GET",
url: "/api/data",
dataType: "json"
}).success(function(data){
return dispatch({type:'GET_BOOK', data: data});
});
}
Then, pass dispatch to the action:
function mapDispatchToProps(dispatch) {
return {
getBooks: () => getBook(dispatch),
};
}
Now, you should have access to the action.data property in the reducer:
const booksReducer = (state = initialState, action) => {
switch (action.type) {
case GET_BOOK:
//action.data <--- here
return state;
default:
return state;
}
};
You might want to separate concerns, to keep action creators "pure".
Solution; write some middleware. Take this for example (using superagent).
import Request from 'superagent';
const successHandler = (store,action,data) => {
const options = action.agent;
const dispatchObject = {};
dispatchObject.type = action.type + '_SUCCESS';
dispatchObject[options.resourceName || 'data'] = data;
store.dispatch(dispatchObject);
};
const errorHandler = (store,action,err) => {
store.dispatch({
type: action.type + '_ERROR',
error: err
});
};
const request = (store,action) => {
const options = action.agent;
const { user } = store.getState().auth;
let method = Request[options.method];
method = method.call(undefined, options.url)
if (user && user.get('token')) {
// This example uses jwt token
method = method.set('Authorization', 'Bearer ' + user.get('token'));
}
method.send(options.params)
.end( (err,response) => {
if (err) {
return errorHandler(store,action,err);
}
successHandler(store,action,response.body);
});
};
export const reduxAgentMiddleware = store => next => action => {
const { agent } = action;
if (agent) {
request(store, action);
}
return next(action);
};
Put all this in a module.
Now, you might have an action creator called 'auth':
export const auth = (username,password) => {
return {
type: 'AUTHENTICATE',
agent: {
url: '/auth',
method: 'post',
resourceName: 'user',
params: {
username,
password
}
}
};
};
The property 'agent' will be picked up by the middleware, which sends the constructed request over the network, then dispatches the incoming result to your store.
Your reducer handles all this, after you define the hooks:
import { Record } from 'immutable';
const initialState = Record({
user: null,
error: null
})();
export default function auth(state = initialState, action) {
switch (action.type) {
case 'AUTHENTICATE':
return state;
case 'AUTHENTICATE_SUCCESS':
return state.merge({ user: action.user, error: null });
case 'AUTHENTICATE_ERROR':
return state.merge({ user: null, error: action.error });
default:
return state;
}
};
Now inject all this into your view logic. I'm using react as an example.
import React from 'react';
import ReactDOM from 'react-dom';
/* Redux + React utils */
import { createStore, applyMiddleware, bindActionCreators } from 'redux';
import { Provider, connect } from 'react-redux';
// thunk is needed for returning functions instead
// of plain objects in your actions.
import thunkMiddleware from 'redux-thunk';
// the logger middleware is useful for inspecting data flow
import createLogger from 'redux-logger';
// Here, your new vital middleware is imported
import { myNetMiddleware } from '<your written middleware>';
/* vanilla index component */
import _Index from './components';
/* Redux reducers */
import reducers from './reducers';
/* Redux actions*/
import actionCreators from './actions/auth';
/* create store */
const store = createStore(
reducers,
applyMiddleware(
thunkMiddleware,
myNetMiddleware
)
);
/* Taint that component with store and actions */
/* If all goes well props should have 'auth', after we are done */
const Index = connect( (state) => {
const { auth } = state;
return {
auth
};
}, (dispatch) => {
return bindActionCreators(actionCreators, dispatch);
})(_Index);
const provider = (
<Provider store={store}>
<Index />
</Provider>
);
const entryElement = document.getElementById('app');
ReactDOM.render(provider, entryElement);
All of this implies you already set up a pipeline using webpack,rollup or something, to transpile from es2015 and react, to vanilla js.
Consider using the new thunk API
export const load = createAsyncThunk(
'example/api',
async (arg, thunkApi) => {
const response = await fetch('http://example.api.com/api')
if (response.status === 200) {
const json = await response.json()
return json
},
)
Also, in the new redux template application, actions are part of the reducer/slice, and you can use extraReducers to response to events related to the async action status. It is much simpler using redux this way.
See documentation of async thunk here: https://redux.js.org/usage/writing-logic-thunks