A lib for fetching normalized data in a redux store through sagas.
[](https://circleci.com/gh/betagouv/redux-saga-data/tree/master)
[](https://npmjs.org/package/redux-saga-data)
## Basic Usage
You need to install a redux-saga setup with the watchDataActions and the data reducer:
```javascript
import {
applyMiddleware,
combineReducers,
createStore
} from 'redux'
import createSagaMiddleware from 'redux-saga'
import { all } from 'redux-saga/effects'
import { createDataReducer, watchDataActions } from 'redux-saga-data'
const sagaMiddleware = createSagaMiddleware()
const storeEnhancer = applyMiddleware(sagaMiddleware)
function* rootSaga() {
yield all([
watchDataActions({
rootUrl: 'http://momarx.fr',
}),
])
}
const rootReducer = combineReducers({
data: createDataReducer({ users: [] }),
})
const store = createStore(rootReducer, storeEnhancer)
sagaMiddleware.run(rootSaga)
```
Then you can request data from your api that will be stored
in the state.data
```javascript
import React, { Fragment } from 'react'
import { requestData } from 'redux-redux-saga'
class Foos extends Component {
constructor () {
super()
this.state = { error: null }
}
componentDidMount () {
const { dispatch } = this.props
dispatch(requestData({
apiPath: '/foos',
handleFail: () => this.setState({ error: action.error }),
method:'GET'
}))
}
render () {
const { foos } = this.props
const { error } = this.state
if (error) {
return error
}
return (
{foos.map(foo => (
{foo.text}
))}
)
}
}
function mapStateToProps (state) {
return {
foos: state.data.foos
}
}
export default connect(mapStateToProps)(Foo)
```
NOTE: We could also used a handleSuccess in the requestData api, in order to grab the action.data foos in that simple case:
```javascript
constructor () {
this.state = { error: null, foos: [] }
}
componentDidMount () {
const { dispatch } = this.props
dispatch(requestData({
apiPath: '/foos',
handleFail: () => this.setState({ error: action.error }),
handleSuccess: () => this.setState({ foos: action.data }),
method:'GET'
}))
}
render () {
const { error, foos } = this.setState
...
}
```
But if your rendered foos array should be coming from a memoizing merging (and potentially normalized) (and potentially selected from inter data filter conditions) state of foos, then syntax goes easier if you pick from the connected redux store lake of data.
## Usage with config
See all the possible config for requestData in the [fetch-normalize-data]( https://github.com/betagouv/fetch-normalize-data/tree/master) doc.