Multiple redux-sagas

Question

I use react-redux and redux-saga for API calls from this example. My target is to do another API calls with different urls and to use them in different pages. How to achieve that?

Sagas:

import { take, put,call } from 'redux-saga/effects';
import { takeEvery, delay ,takeLatest} from 'redux-saga';
function fetchData() {
    return  fetch("https://api.github.com/repos/vmg/redcarpet/issues?state=closed")
    .then(res => res.json() )
    .then(data => ({ data }) )
    .catch(ex => {
        console.log('parsing failed', ex);
        return ({ ex });
    });
}
function* yourSaga(action) {
    const { data, ex } = yield call(fetchData);
    if (data)
    yield put({ type: 'REQUEST_DONE', data });
    else
    yield put({ type: 'REQUEST_FAILED', ex });
}
export default function* watchAsync() {
    yield* takeLatest('BLAH', yourSaga);
}
export default function* rootSaga() {
    yield [
        watchAsync()
    ]
}

App:

import React, { Component } from 'react';
import { connect } from 'react-redux';
class App extends Component {
    componentWillMount() {
        this.props.dispatch({type: 'BLAH'});
    }
    render(){
       return (<div>
            {this.props.exception && <span>exception: {this.props.exception}</span>}
            Data: {this.props.data.map(e=><div key={e.id}>{e.url}</div>)}

          </div>);
    }
}
export default connect( state =>({
    data:state.data , exception:state.exception
}))(App);

My target is to make another saga, which I will use in another component, and both to not mess with each other. Does that possible?

Answer 1

Redux Saga uses the all function in the recent version (0.15.3) to combine multiple sagas to one root saga for the Redux store.

import { takeEvery, all } from 'redux-saga/effects';

...

function *watchAll() {
  yield all([
    takeEvery("FRIEND_FETCH_REQUESTED", fetchFriends),
    takeEvery("CREATE_USER_REQUESTED", createUser)
  ]);
}

export default watchAll;

In the Redux store you can use the root saga for the saga middleware:

import { createStore, applyMiddleware } from 'redux';
import createSagaMiddleware from 'redux-saga';

import rootReducer from './reducers';
import rootSaga from './sagas';

const sagaMiddleware = createSagaMiddleware();
const store = createStore(
  rootReducer,
  applyMiddleware(sagaMiddleware)
);

sagaMiddleware.run(rootSaga)