Initial redux-orm state loading

loadStateReducer.ts

import orm from 'schema/orm'

export function loadStateReducer(state = orm.getEmptyState(), payload) {
  // Create a Redux-ORM session from our entities "tables"
  const session = orm.session(state)

  const parseEntity = (modelName, stateSlotName) => {
    const ModelClass = session[modelName]

    const modelStates = payload.entities[stateSlotName]
    if (modelStates) {
      // generic entities load
      // parse by default will upsert model instance
      return modelStates.map ?
        modelStates.map(modelState => ModelClass.parse(modelState)) :
        ModelClass.parse(modelStates)
    }
  }

  // pay attention to our custom `stateSlotName` model class property
  orm.getModelClasses().forEach(modelClass => {
    const ModelClass = session[modelClass.modelName]
    parseEntity(modelClass.modelName, ModelClass.stateSlotName)
  })

  return session.state
}

store.tsx

import { renderToString } from 'react-dom/server'

import configureStore from 'common/store'
import { loadStateReducer } from 'product/reducers'

export const getInitialState = () => {
  const initialState = {
    // !!!!!YOUR INITIAL JSON STATE HERE!!!!
  }
  return {
    orm: loadStateReducer(undefined, initialState)
  }
}

...

const store = configureStore({ initialState: getInitialState(), reducers, rootSaga })

const html = renderToString(
  <Provider store={store}>
    <App />
  </Provider>
)

...