erschema-selectors

A class of selectors for use with the erschema-redux-immutable library

Usage

import Selector from 'erschema-selectors'
import erschema from 'erschema-redux-immutable'
import { createStore, combineReducers } from 'redux';
import { Record } from 'immutable'
import schema from './schema'
import reducers from './reducer'

const store = createStore(combineReducer({
  ...reducers,
  erschema({
    schema,
  })
}))

class UserModel extends Record({
  name: '',
  id: '',
}){}

const defaultUserModel = new UserModel()

const userSelectors(
  ((state)=>state.erschema) | 'erschema',
  'users',
  defaultUserModel
)

const mapStateToProps = (state, props)=>{
  return {
    user: userSelectors.find((props)=>props.id)(state, props)
  }
}

Properties

type $idSelector = (state: Object, props: Object)=>any
const defaultIdSelector = (s, p)=>p.id

type $idsSelector = (state: Object, props: Object)=>any[]

findEntityData

userSelectors.findEntityData()
===>
returns all of the models for users entity type in an immutable Map

find

userSelectors.find(idSelector?: $idSelector = defaultIdSelector)
===>
returns the user model if it exists, or the default user model

get

userSelectors.find(idSelectors: $idsSelector)
===>
returns the ids iterator type mapped with the user models if they exists, or the default user model

get

userSelectors.find(idSelectors: $idsSelector)
===>
returns the ids iterator type mapped with the user models if they exists, or the default user model

findManyRelationshipData

userSelectors.findManyRelationshipData(relationshipName)
===>
returns the entire immutable Map of relationship values

ie. userSelectors.findManyRelationshipData('friends')
===>
Immutable.Map({
  [id]: Immutable.OrderedSet([...ids])
})

findMonoRelationshipData

userSelectors.findMonoRelationshipData(relationshipName)
===>
returns the entire immutable Map of relationship values

ie. userSelectors.findManyRelationshipData('friends')
===>
Immutable.Map({
  [id]: id
})

getRawRelatedIds

userSelectors.getRawRelatedIds(relationshipName, idSelector?: $$idSelector = defaultIdSelector)
===>
returns the relationship for a specific id as an Immutable OrderedSet if it exists, or a empty OrderedSet if no relationship for that id exists

getRelatedIds

Same as getRawRelatedIds except returns an Immutable List instead of an OrderedSet, which is easier to work with

findRelatedId

userSelectors.findRelatedId(relationshipName, idSelector?: $$idSelector = defaultIdSelector)
===>
returns the related id for a specific ids relationship  if it exists, or a 0 if it does not exist