backmeupplz / mobx-persist

persist mobx stores

Mobx Persist

$ npm install mobx-persist --save

Usage

import { observable } from 'mobx'
import { create, persist } from 'mobx-persist'

class SomeItem {
    @persist @observable  name = 'some'
    @persist @observable count = 0
}

class SomeStore {
    @persist('object') @observable         obj = { a: 1, b: 2 }
    @persist('map')    @observable   stringMap = observable.map<string>({})
    @persist('list')   @observable     numList = [1,2,3,4]
    @persist('object', SomeItem) @observable s = new SomeItem
    @persist('map', SomeItem)    @observable m = observable.map<SomeItem>({})
    @persist('list', SomeItem)   @observable l = []
}

const hydrate = create({
    storage: localForage,   // or AsyncStorage in react-native.
                            // default: localStorage
    jsonify: false  // if you use AsyncStorage, here shoud be true
                    // default: true
})

// create the state
export const someStore = new SomeStore()
hydrate('some', someStore).then(() => console.log('someStore has been hydrated'))

without decorators

const data = observable({
    title: 'no decorator',
    someObject: {
        a: 1,
        b: 'b',
    },
    someArray: [{
        c: 1,
        d: 'd'
    }]
})
const schema = {
    title: true,
    someObject: {
        type: 'object',
        schema: {
            a: true,
            b: true
        }
    },
    someArray: {
        type: 'list',
        schema: {
            c: true,
            d: true
        }
    }
}
export const someStore = persist(schema)(data)
hydrate('some', someStore).then(() => console.log('someStore has been hydrated'))

with initial state

const initialState = window.__STATE__.some || {
    obj: { a: 2, b: 1 }
}
export const someStore = new SomeStore()

hydrate('some', someStore, initialState)
    .then(() => console.log('some hydrated'))

re-hydration

const result = hydrate('some', someStore, initialState)
const rehydrate = result.rehydrate
result.then(() => console.log('some hydrated'))

setTimeout(() => {
    rehydrate().then(() => console.log('rehydrated'))
}, 3000)

API

persist(schema)(object)

• arguments
  • schema string/object Describes the type of data you are planning to persist. Not needed for JS primitive types. Options: 'object' | 'list' | 'map' or a structured schema object.
  • observable any The observable that you are persisting.
• returns a persistence-enabled version of observable

create(config)

• arguments
  • config object Describes the storage container you want your data to reside in.
    • storage localForage/AsyncStorage/localStorage localForage-style storage API. localStorage for Web (default), AsyncStorage for React Native
    • jsonify bool Enables serialization as JSON
    • debounce number Debounce interval applied to storage calls (in miliseconds, default 0).
• returns
  • hydrate function hydrate(key, store, initialState?, customArgs?)
    • key string The key of your datastore that you want to hydrate from your persisted record.
    • store object The store in which that key resides.
    • initialState object Optional initial state the store is seeded with.
    • customArgs object Optional custom arguments that are available during the deserialization process which can be used to pass in e.g. stores to model constructors during deserialization. See https://github.com/mobxjs/serializr#6-use-custom-arguments-to-inject-stores-to-models
    • returns IHydrateResult

interface IHydrateResult

extends Promise

• methods
  • rehydrate function
    • returns IHydrateResult

Examples

• Web
• React Native

Dependency

• Serializr