javascript - Persisting only some fields from the Reducer - Stack Overflow

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Hi in our app we have a reducer pattern:

{
   data: //here we have our actual data
   fetching: // is it still fetching 
   intact: // has it been 'touched'
   error: //errors if need be
}

furthermore due to business demand I need to persist a ReduxForm which is its own can of worms...

form: {
    Foobar: {
      values: {

      },
      initial: {

      },
      syncErrors: {

      },
      registeredFields: {

      }
    }
  }
}

it is as you may have figured out is pointless to persist anything but data, but Redux-Persist persists the entire reducer. The examples on filtering and transformation is a bit... lackluster in my feel and I have been strugling to implement. Looking for an example

Hi in our app we have a reducer pattern:

{
   data: //here we have our actual data
   fetching: // is it still fetching 
   intact: // has it been 'touched'
   error: //errors if need be
}

furthermore due to business demand I need to persist a ReduxForm which is its own can of worms...

form: {
    Foobar: {
      values: {

      },
      initial: {

      },
      syncErrors: {

      },
      registeredFields: {

      }
    }
  }
}

it is as you may have figured out is pointless to persist anything but data, but Redux-Persist persists the entire reducer. The examples on filtering and transformation is a bit... lackluster in my feel and I have been strugling to implement. Looking for an example

• javascript
• reactjs
• redux
• redux-form
• redux-persist

Share Improve this question Follow edited Sep 4, 2018 at 7:42 Tackgnol asked Sep 4, 2018 at 7:31 TackgnolTackgnol 50511 gold badge1010 silver badges1717 bronze badges

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2 Answers 2

Sorted by: Reset to default 10

Ok so this works using redux-persist-transform-filter like @NickHTTPS sugested:

import createFilter from 'redux-persist-transform-filter';

const saveSubsetFilter = createFilter('form', ['Foo.bar']);

const persistConfig = {
    key: 'form',
    storage,
    whitelist: ['form'],
    transforms: [saveSubsetFilter]
};

persistCombineReducers(persistConfig, { form: formReducer });

works like a charm :)

It's possible to whitelist/blacklist keys in redux-persist:

import { createStore } from 'redux'
import { persistStore, persistReducer } from 'redux-persist'
import storage from 'redux-persist/lib/storage'

const persistConfig = {
  key: 'form',
  storage: storage,
  whitelist: ['Foobar'] // only Foobar will be persisted
};

const persistedReducer = persistReducer(persistConfig, rootReducer)

export default () => {
  let store = createStore(persistedReducer)
  let persistor = persistStore(store)
  return { store, persistor }
}

Unfortunately whitelist/blacklist only accepts 1 level deep so I think you need to use something like this: https://github./edy/redux-persist-transform-filter or rework your data structure in a way that you can bypass the 1 level deep limitation of the library.

Hope it helps!

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