Does not work 1

[dsame]

`import { observable, action } from 'mobx';
import { create, persist } from 'mobx-persist';

const DEFAULT_ZOOM = 5;
class Map {
@persist
@observable
zoom = DEFAULT_ZOOM;
}

class UI {
@observable hydrated = false;
@observable map = new Map();
}

const ui = new UI();

const hydrate = create({});

export default ui;
hydrate('map2ui', ui)
`

causes
mobx.module.js?daf9:3516 [mobx] Encountered an uncaught exception that was thrown by a reaction or observer component, in: 'Reaction[Reaction@1] Error: [serializr] Failed to find default schema for undefined at invariant (serializr.js?967d:44) at Object.serialize (serializr.js?967d:363) at mobx_1.reaction.delay (index.js?b78b:47) at eval (mobx.module.js?daf9:600) at trackDerivedFunction (mobx.module.js?daf9:3287) at Reaction.track (mobx.module.js?daf9:3491) at reactionRunner (mobx.module.js?daf9:599) at Reaction.eval [as onInvalidate] (mobx.module.js?daf9:587) at Reaction.runReaction (mobx.module.js?daf9:3463) at runReactionsHelper (mobx.module.js?daf9:3589)

[dsame]

The problems seems to appear if there's no at least one persisted field in the object. But i really do not want to persist any of child stories. I want to persist storie's properties (some of them)

[designbyadrian]

I spent hours trying to figure this out. @dsame 's reply helped. I'm now adding one as soon as my store is constructed, but this is only sometimes a viable solution.

[shrugs]

I'd expect that you can also only hydrate that one child store hydrate("map", ui.map) without a problem.

[marcelxsilva]

This error occurs when, for example, a store called user does not have persist inside it, but in the store's index it hashydrate('user', stores.user).

Just remove hydrate('user', stores.user) and the problem will be solved.

it worked for me.