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Uncaught Error : Action is missing a listen method React/Reflux?

I am New to React Redux.This is a simple App I am developing.But Error is I can't connect to store through Action.
This is my error
utils.js:78 Uncaught Error: action is missing a listen method
topic-list.js
var React = require('react');
var Reflux = require('reflux');
var TopicStore = require('../stores/topic-store');
var Actions = require('../actions');
module.exports = React.createClass({
mixins:[
Reflux.listenTo(TopicStore,'onChange')
],
getInitialState:function () {
return{
topics:[]
}
},
componentWillMount:function () {
//Actions.getTopics()
Actions.getTopics()
},
render:function () {
return <div className="list-group">
ToPic List
{this.renderTopics()}
</div>
},
renderTopics:function () {
return this.state.topics.map(function(topic) {
return <li key={topic.id}>
{topic.description}
</li>
})
},
onChange:function (evet,topics) {
this.setState({topics:topics})
}
});
actions.js
var Reflux = require('reflux');
module.exports = Reflux.createAction([
'getTopics',
]);
topic-store.js
var Api = require('../utils/api');
var Reflux = require('reflux');
var Actions = require('../actions');
module.exports = Reflux.createStore({
listenables:[Actions],
getTopics:function () {
return Api.get('topics/defaults')
.then(function (json) {
this.topics = json.data;
this.triggerChange();
}.bind(this));
},
con:function () {
console.log('Working')
},
triggerChange:function () {
this.trigger('change',this.topics)
}
});

The error message implies you are trying to listen to something which can't be listened to (ie. it doesn't have a listen method.)
That means the source of the error can either be:
listenables:[Actions] from topic-store.js
Reflux.listenTo(TopicStore,'onChange') from topic-list.js
I believe it's the former, as there is a typo in actions.js, as the method is Reflux.createActions, not Reflux.createAction.

Rendering happens without waiting for API data in React JS

I am new in ReactJS and I am creating single registration page App where drop-down data is from API, but when I am trying to fetch the data there is error showing.
my Sample code is below:
AppApi.js:
var AppActions =require('../actions/AppActions');
var request = require('superagent');
var Data= {};
module.exports ={
request.get('*http://api.randomuser.me/*')
.set('Accept', 'application/json')
.end(function(err, response) {
if (err) return console.error(err);
Data.details= response.text;
AppActions.receiveData(Data.details);
});
}
my Action is:
var AppDispatcher = require('../dispatcher/AppDispatcher');
var AppConstants = require('../constants/AppConstants');
var AppActions = {
receiveData: function(data){
AppDispatcher.handleViewAction({
actionType: AppConstants.RECEIVE_DATA,
data: data
})
}
}
module.exports= AppActions;
my ConstantFile is:
module.exports ={
RECEIVE_GENDERS: 'RECEIVE_GENDERS'
}
Dispatcher is:
var Dispatcher = require('flux').Dispatcher;
var assign = require('object-assign');
var AppDispatcher= assign( new Dispatcher(), {
handleViewAction :function(action){
var payload ={
source: 'VIEW_ACTION',
action: action
}
this.dispatch(payload);
}
});
module.exports =AppDispatcher;
in my Store:
var AppDispatcher = require('../dispatcher/AppDispatcher');
var AppConstants = require('../constants/AppConstants');
var EventEmitter =require('events').EventEmitter;
var assign =require('object-assign');
var AppAPI = require('../utils/appAPI.js');
var CHANGE_EVENT ='change';
var _data=[];
var AppStore= assign({ }, EventEmitter.prototype, {
setData: function(data){
console.log("my Data", data);
_data=data
},
getData: function(){
//not getting data in console
console.log("returning Data", _data);
return _data;
},
emitChange: function(){
this.emit(CHANGE_EVENT);
},
addChangeListener : function(callback){
this.on('change', callback);
},
removeChangeListener: function(callback){
this.removeListener('change',callback)
}
});
AppDispatcher.register(function(payload){
var action = payload.action;
switch(action.actionType){
case AppConstants.RECEIVE_DATA:
AppStore.setData(action.data);
AppStore.emit(CHANGE_EVENT);
break;
}
return true;
});
module.exports =AppStore;
my Main.js is:
var App= require('./components/App');
var React = require('react');
var ReactDom = require('react-dom');
var AppAPI = require('./utils/appAPI.js');
AppAPI.getGenders();
ReactDom.render(
<App/>,
document.getElementById('app')
)
and My APP.JS is in following format:
var React =require('react');
var AppActions = require('../actions/AppActions');
var AppStore = require('../stores/AppStore');
function getAppState(){
return{
data: AppStore.getData()
}
}
var App= React.createClass({
getInitialState: function(){
console.log(getAppState().data)
return getAppState()
},
componentDidMount: function(){
AppStore.addChangeListener(this._onChange);
},
componentWillUnmount: function(){
AppStore.removeChangeListener(this._onChange);
},
render: function(){
},
_onChange: function(){
this.setState(getAppState());
}
});
module.exports =App;
Problem: empty object getting in console.log(getAppState().data) because rendering part is not waiting for ajax data.
please help me or give me some solution for this problem, I am struggling with it since last 3 days.
Thanks in advance

In case you want to avoid rendering a react component because data are not loaded yet, you can condition the component displaying this way:
return{
<div>
{
this.state.data?
<ComponentExample data={this.state.data}/>
:
null
}
</div>
}
There is other ways to condition component rendering, like using a stateless component, but this ways will work just fine.
Otherwise, It is not a problem that you got an empty object in getInitialState(): It is right that you lack data at first rendering, but as soon as data from your API will be retreived, thanks to _onChange(),the component will be re-rendered and as a result, ComponentExample could be displayed.

function getAppState(){
return{
data: AppStore.getData(),
status:AppStore.getStatus()
}
}
add getStatus function to AppStore
render: function(){
if(this.state.status=='loading')
return (<div className="loading"></div>);
if ....
return (<RealComponent data={this.state.data}></RealComponent>)
},

Pass data to React component with kefirjs

I am new in ReactJS and "reactive programming". I tried to create a dispatcher, action and store according to this project, but I don't know how to pass data to component.
In this example it doesn't work.
var data = [1, 2, 3, 4, 5];
var AppDispatcher = Kefir.emitter();
function DataActions() {
this.getAllData = function () {
AppDispatcher.emit({
actionType: "GET_ALL"
});
};
}
var Actions = new DataActions();
var getAllDataActionsStream = AppDispatcher.filter(function (action) {
return action.actionType === "GET_ALL";
}).map(function (action) {
return function (data) {
return data;
};
});
var dataStream = Kefir.merge([getAllDataActionsStream]).scan(function (prevData, modificationFunc) {
return modificationFunc(prevData);
}, {});
var Content = React.createClass({
getInitialState: function() {
this.onDataChange = this.onDataChange.bind(this);
return {componentData: []};
},
componentDidMount: function() {
dataStream.onValue(this.onDataChange);
},
componentWillMount: function(){
dataStream.offValue(this.onDataChange);
console.log(Actions.getAllData());
},
onDataChange(newData) {
this.setState({componentData: newData});
},
render: function() {
console.log(this.state);
var list = this.state.componentData.map(function (item, i) {
return (
<li key={i}>{item}</li>
);
});
return <ul>{list}</ul>;
}
});
React.render(<Content />, document.getElementById('container'));

Before I begin to answer in length I want to answer this part up front:
but I don't know how to pass data to component.
In the example you linked the author passes in the Todos into the main component using React's props, not with an action. So that is the approach I take in my example as well.
Now here is my example. I highly reccommend looking at the example and reading along to what I've written below.
var data = [ 1, 2, 3, 4, 5 ];
// This will now log all events of the AppDispatcher in the console with the prefix 'Kefer: '
var AppDispatcher = Kefir.emitter().log("Kefir: ");
function DataActions() {
// Our application has an action of emitting a random number.
this.emitNumber = function() {
AppDispatcher.emit({
actionType: "EMIT_NUMBER"
})
};
}
var Actions = new DataActions();
var emitNumberActionStream = AppDispatcher
.filter(function(action) {
return action.actionType === "EMIT_NUMBER";
})
.map(function(action) {
console.log("EMIT_NUMBER ACTION OCCURRED!!");
return Math.floor(Math.random() * (10)) + 1;
});
// Only one stream, no need to merge right now.
//var dataStream = Kefir.merge([ getAllDataActionsStream ]);
var Content = React.createClass({
getInitialState: function() {
// Set initial componentData using the data passed into this component's via props
return { componentData: this.props.data };
},
componentDidMount: function() {
// On each emitted value run the this.onDataChange function
emitNumberActionStream.onValue(this.onDataChange);
// Every second emit a number using the Actions we created earlier
setInterval(function() {
Actions.emitNumber();
}, 1000);
},
onDataChange: function(emittedNumber) {
console.log('state on change:', this.state);
// Update the state by appending the emitted number to the current state's componentData
this.setState({ componentData: this.state.componentData.concat([emittedNumber])});
console.log('updated state: ', this.state);
console.log('-----------------');
},
render: function() {
console.log('RENDER AGAIN!');
var list = this.state.componentData.map(function(item, i) {
return (
<li key={i}>{item}</li>
);
});
return <ul>{list}</ul>;
}
})
;
// Pass in initial data using props 'data={data}'
React.render(<Content data={data}/>, document.getElementById('container'));
I modified the example you gave that wasn't working so that it works and makes a little more sense (hopefully).
The Actions and Stores work like this:
Actions:
Request a number be emitted
Stores
Listen for "EMIT_NUMBER" actions and emit a random number
And the actual component runs like this:
It gets the initial 5 numbers passed into the component via props.
Once mounted it begins listening to the store and creates a setInterval that calls the action dispatcher's emitNumber() action. The interval is to show the reactivity at work, you could imagine that there was a button to press that would call emitNumber() instead.
The store observes the action dispatcher emit "EMIT_NUMBER" and emits a number.
The component observes the store emitted a number and updates the component's state.
The component observes that its state has changed and it rerenders.

I believe the issue is that you're using ES6 syntax (which is what the example was written in... notice the Readme). You'll need to either use a transpiler like Babel or convert your method(param => console.log(param)) syntax into normal JS (ie, method(function(param) { console.log(param) });).

I am having trouble passing in my backbone collection in to a react component

my backbone collection collection doesn't populate when i just pass it in as props to a react component. I have tried first fetching the collection using componentDidmount and componentWillMount, but that still didn't populate the collection. If I test the code by setting a window variable pointing to DecksIndex and in the console tools call getInstance() and then fetch
,the data loads fine. my code is as follows:
//router.js
var DeckComponent = require("./views/deck.jsx")
var DecksIndex = React.createFactory(require("./views/decks.jsx"))
var decksCollection = require("./component/collections/decks.js");
module.exports = Backbone.Router.extend({
initialize: function(){
this.rootEl = document.getElementById('container');
},
routes: {
"":"index",
"decks/:id":"deckShow"
},
index: function(){
var decks = new DecksIndex({decks: decksCollection.getInstance()});
this._swapView(decks)
console.log("hooray!")
},
deckShow: function(id){
//var deck = Flashcards.Collections.decks.getOrFetch(id);
var showDeck = new DeckComponent();
this._swapView(showDeck);
},
_swapView: function(view){
if (this.currentView) {
React.unmountComponentAtNode(this.rootEl);
}
this.currentView = view
React.render(view, document.getElementById('container'));
}
});
//decks.js
var deck = require('../models/deck.js')
var decks = Backbone.Collection.extend({
url: "/api/decks",
model: deck,
getOrFetch: function(id){
var model = this.get(id);
var that = this;
if (model) {
model.fetch();
}else{
model = new deck({id: id})
model.fetch({
success: function(){
that.add(model)
}
})
}
return model;
},
parse: function (data) {
debugger;
return data.objects
},
});
decks.getInstance = _.memoize(function () {
return new decks();
});
module.exports = decks;
//decks.jsx
var DecksList = React.createClass({
render: function() {
return (
<div className="deck-list">
{
this.props.decks.map(function (deck) {
var title = deck.name
debugger;
return (
<div key={deck.id} className="note-summary">
{title}
</div>
);
})
}
</div>
);
}
});
module.exports = DecksList;

this is an example of a situation where a container component that manages state makes sense. If DecksList had a container that retrieved the collection when it mounted and only rendered DecksList once the data was available it would probably solve the problem. Here's a good article on the pattern: https://medium.com/#dan_abramov/smart-and-dumb-components-7ca2f9a7c7d0

React, can't set up auto update on emit change

This is my component class (Part of it).
updateStore: function() {
console.log("Updating state in the Calendar.js");
this.setState(this.getInitialState());
},
componentDidMount: function() {
EventsStore.addChangeListener(this.updateStore, 'CHANGE');
},
componentDidUnmount: function() {
EventStore.removeChangeListener(this.updateStore);
},
This is my action (Tuxx)
var Actions = require('tuxx/Actions');
var eventsStore = require('../Stores/EventsStore');
var jQ = require('jquery');
var eventsActions = Actions.createActionCategory({
category: 'events',
source: 'standard',
actions: ['create', 'get']
});
eventsActions.register(eventsStore, {
create: eventsStore.onCreate,
get: eventsStore.onGet
});
eventsActions.before('get', function (nextCallback, actionBody) {
jQ.get('http://127.0.0.1:8181/events').done(function(resp) {
nextCallback(resp);
});
});
module.exports = eventsActions;
And this is part of my store
onGet: function(resp) {
resp = JSON.parse(resp);
this._events = resp;
console.log(this._events);
console.log("Emiting change")
this.emitChange('CHANGE');
},
And last, this is my init code:
eventsAction.get();
var App = React.createClass({
render: function() {
return (
<div>
<RouteHandler />
</div>
)
}
});
var routes = (
<Route name="app" path="/" handler={App}>
<DefaultRoute handler={Calendar} />
<Route name="event.edit" path="/event/:eventId" handler= {EventEditForm} />
</Route>
);
Router.run(routes, function(Handler) {
React.render(<Handler />, document.getElementById("main"));
});
As far as I understand, it should re render my component when emitChange is run.
This is my console output:
I think it should hit the
console.log("Updating state in the Calendar.js");
part, but it doesn't.
I am far from being competent in JS world, so I need help.
Thank you in advance.
This is how store is required:
var EventsStore = require('./Stores/EventsStore');
store is saved as follows:
Store is defined as:
var Stores = require('tuxx/Stores')
var eventsStore = Stores.createStore({
_events: [],
getAll: function () {
return Object.keys(this._events);
},
(...)
(...)
onGet: function(resp) {
resp = JSON.parse(resp);
this._events = resp;
console.log(this._events);
console.log("Emiting change")
this.emitChange();
},
register: function () {
return {
events: {
create: this.onCreate,
get: this.onGet
}
};
}
});
module.exports = eventsStore;
In the component I use it using EventsStore variable which was created from:
var EventsStore = require('./Stores/EventsStore');
Second edit.
I was still digging and I found out this:
componentDidMount: function() {
EventsStore.addChangeListener(this.updateStore);
console.log('Calendar::componentDidMount');
console.log(EventsStore.listeners());
console.log('----')
},
And the result in the console is:
[Log] Calendar::componentDidMount (app.js, line 36083)
[Log] [] (app.js, line 36084)

Having looked at the Tuxx source code, I believe that should work. You can also omit that second "CHANGE" parameter to emitChange and addChangeListener and it'll use a default. I assume it's the same instance of the store you're using everywhere?
Looking at Tuxx, they use the createOwnerClass and connectOwnerToStore combo to make all of this happen automatically - see the initial guide on the homepage. Perhaps using that approach would help you track down the bug?