Redux-persist: sub state for key `%s` modified, skipping myKey

[SpadarShut]

When my app is started I get the following message in console

sub state for key `%s` modified, skipping myKey

and so I don't see updated data for myKey. Can someone please advice what can be wrong?
Also, when my redux state for this key is updated I get no message that something gets written into storage.
Using react-native with AsyncStorage if it matters.

[rt2zz]

that means that your reducer for myKey is modifying state. Typically this is solve by making sure your default case for the reducer returns plain state
i.e.

default:
  return state

[leethree]

Not sure if it's related or totally different issue. I'm getting this warning:

redux-persist/stateReconciler: sub state for key `_persist` modified, skipping.

See persistReducer.js L104-L111, it looks like state and inboundState has _persist key but reducedState doesn't. Is this intended?

[SpadarShut]

@rt2zz thanks, changed my reducer and now all's working!

[rt2zz]

@leethree good catch, that dev check has now been updated to skip _persist key: https://github.com/rt2zz/redux-persist/blob/v5/src/stateReconciler.js#L60

[leethree]

@rt2zz awesome, thanks!

[cs1717c]

To add to this.... (since I was stuck on this forever):

If you're reducer uses

case default:
return {...state}

this will not work for redux-persist. Change it to return state;

[brunolemos]

I'm having this warning on v5 and the reducers already returns the state on case default.

redux-persist/stateReconciler: sub state for key `admin` modified, skipping.
redux-persist/stateReconciler: sub state for key `auth` modified, skipping.
redux-persist/stateReconciler: sub state for key `matches` modified, skipping.
redux-persist/stateReconciler: sub state for key `premium` modified, skipping.
redux-persist/stateReconciler: sub state for key `swipes` modified, skipping.
autoMergeLevel1.js:21

redux-persist/stateReconciler: rehydrated keys 'admin, albums, auth, deepLink, matches, permissions, premium, profiles, review, swipes, _persist'
autoMergeLevel1.js:29

It seems to be because I'm handling the REHYDRATE action type:

switch (action.type) {
  case REHYDRATE:
    return {
      ...initialState,
      ..._.omit((action.payload || {}).admin, ['loading']),
    }

Can this cause issue? What's the alternative implementation?

[amitpatil321]

@cs1717c : Thanks man! that was exactly my problem.

[cnscorpions]

@rt2zz thanks, it solves the very problem.

[justinkx]

To add to this.... (since I was stuck on this forever):

If you're reducer uses

case default:
return {...state}

this will not work for redux-persist. Change it to return state;

Thanks, It saved my day