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redux-data-collections

v0.0.12

Published

Redux actions, reducers and selectors for managing data in JSONAPI format.

Downloads

19

Readme

redux-data-collections

Redux actions, reducers and selectors for managing data in JSONAPI format.

About

Installation

yarn add redux-data-collections

Usage

These examples presume you're using React Redux Starter Kit (because I do). There's nothing particularly special about one react-redux kit versus another. You should be able to adapt these examples to your needs.

Redux-data-collections exports createCollectionReducer by default. A collection reducer will only handle actions with a meta.type that matches the collection type. For instance, if you create a reducer like createCollectionReducer('cars'), the created reducer will only respond to actions where the action.meta.type === 'cars'. In practice, this is managed for you.

Simply add your collections to your root reducer in src/store/reducers.js

import { combineReducers } from 'redux'
import createCollectionReducer from 'redux-data-collections'

// in a naive world we'd just create the reducers and move on
export const createRootReducer = (asyncReducers) => {
  return combineReducers({
    articles: createCollectionReducer('article'),
    comments: createCollectionReducer('comment'),
    people: createCollectionReducer('person'),
    ...asyncReducers
  })
}

// ...

Customizing the default reducer

The reducer returned from redux-data-collections is designed to handle specific actions. For most usecases these default actions will allow you to work smoothly with the collections. However, if we need custom actions we can join the collectionReducer from redux-data-collections with our custom reducer using reduceReducers.

import createCollectionReducer, { reduceReducers } from 'redux-data-collections'
import { handleActions } from 'redux-actions'
import { CUSTOM_ACTION_TYPE } from './constants'

// create a redux-data-collections reducer
const collectionReducer = createCollectionReducer('media')

// create your own reducer
const mediaReducer = handleActions({
  [CUSTOM_ACTION_TYPE]: state => state
}, {})

// join the two reducers together
// the collection reducer will run first, it will capture only redux-data-collections actions
// the media reducer runs second and will get the state after redux-data-collections has altered it
const reducer = reduceReducers(collectionReducer, mediaReducer)

export default reducer

Send actions to your reducers

import { connect } from 'react-redux'
import EditEntity from '../components/EditEntity'
import { setAttribute } from 'redux-data-collections/lib/actions/item'

const mapStateToProps = (state, ownProps) => {
  return {
  }
}

const mapDispatchToProps = (dispatch, ownProps) => {
  return {
    setAttr: (attribute, value) => dispatch(
      setAttribute({
        type: 'post',
        id: 'post-id-1',
        attribute,
        value
      })
    )
  }
}

const EditEntityContainer = connect(mapStateToProps, mapDispatchToProps)(EditEntity)

export default EditEntityContainer

Select value from the state

import { connect } from 'react-redux'
import EditEntity from '../components/EditEntity'
import { selectItemAttributes, selectItemAttributeByName } from 'redux-data-collections/lib/selectors/item'
import { setAttribute } from 'redux-data-collections/lib/actions/item'

const mapStateToProps = (state, ownProps) => {
  return {
    attributes: selectItemAttributes(state)('post', 'post-id-1'), // <-- all attributes
    name: selectItemAttributeByName(state)('post', 'post-id-1', 'name'), // <-- just the name
  }
}

const mapDispatchToProps = (dispatch, ownProps) => {
  return {
    setName: (value) => dispatch(
      setAttribute({
        type: 'post',
        id: 'post-id-1',
        attribute: 'name',
        value
      })
    )
  }
}

const EditEntityContainer = connect(mapStateToProps, mapDispatchToProps)(EditEntity)
export default EditEntityContainer