设置带有REDUX的不变地图中嵌套的属性的值

Question

我正在尝试使用还原器设置state.case.summaries.get(action.summary.id).metadata.summaryRank的值。summaries是Immutable.Map<string, Summary>;

我已经尝试过：

        return {
            ...state,
            'case' : {
                ...state.case,
                summaries : {
                    ...state.case.summaries,
                    [action.summary.id] : {
                        ...state.case.summaries.get(action.summary.id),
                        metadata : {
                            ...state.case.summaries.get(action.summary.id).metadata,
                            summaryRank : action.newRank
                        }
                    }
                }
            }
        };

但是我正在失去我的类型：

`state` before:
ApplicationState {_map: Map, __ownerID: undefined}
after:
{_map: Map, __ownerID: undefined, case: {…}}

`case` before:
Case {_map: Map, __ownerID: undefined}
after:
{_map: Map, __ownerID: undefined, summaries: {…}}

`summaries` before
Map {size: 44, _root: HashArrayMapNode, __ownerID: undefined, __hash: undefined, __altered: false}
after
{size: 44, _root: HashArrayMapNode, __ownerID: undefined, __hash: undefined, __altered: false, …}

所以，如果我稍后尝试做summaries.get(summaryId)，我最终会得到applicationState.case.summaries.get is not a function

---

然后我尝试这样做：

        return state.set('case',
            state.case.set('summaries',
                state.case.summaries.get(action.summary.id).set(//not sure what to do here
                    state.case.summaries.get(action.summary.id).set('metadata',
                        state.case.summaries.get(action.summary.id).metadata.set('summaryRank',
                            action.newRank
                        )
                    )
                )
            )
        );

但是我得到了：

 [exec]
 [exec]  46                     state.case.summaries.get(action.summary.id).set(
 [exec]                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 [exec]  47                         state.case.summaries.get(action.summary.id).set('metadata',
 [exec]     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 [exec] ...
 [exec]  51                         )
 [exec]     ~~~~~~~~~~~~~~~~~~~~~~~~~
 [exec]  52                     )
 [exec]     ~~~~~~~~~~~~~~~~~~~~~
 [exec]
 [exec] .../services/store/caseReducer.ts(46,21): error TS2346: Supplied parameters do not match any signature of call target.
 [exec]

---

更多信息

---

case.ts

const CaseRecord = Immutable.Record({
    id: '',
    reserved:false,
    loaded: false,
    summaries: Immutable.Map<string, Summary>(),
    caseMetadata: new models.CaseMetadata(),
});
export class Case extends CaseRecord {
    public id: string;
    public loaded: boolean;
    public reserved: boolean;
    public summaries: Immutable.Map<string, Summary>;
    public caseMetadata: models.CaseMetadata;
    constructor(properties?: any) {
        super(properties);
    }
    public asMutable(): Case {
        let record = <Case>super.asMutable();
        record.summaries = this.summaries.asMutable();
        this.summaries.forEach((summary) => {
            record.summaries = record.summaries.set(summary.id, <models.Summary>summary.asMutable());
        });
        record.caseMetadata = this.caseMetadata.asMutable();
        return record;
    }
}

applicationstate.ts

const ApplicationStateRecord = Immutable.Record({
    case: new models.Case(),
    lookupValues: {}
});
export class ApplicationState extends ApplicationStateRecord {
    public case: models.Case;
    public lookupValues: LookupValues;
    constructor(properties?: any) {
        super(properties);
    }
}

Answer 1

在Redux Store中使用类类型请小心 - 您必须确保您不使用普通JS对象。

做类似：

的事情

return { /* stuff */ }

Redux无法确定您将其从另一种类型中得出。您可以应用原始原型，例如：

return Object.assign(new ApplicationState(), { /* stuff */ })

但是，当有很多嵌套时，这很乏味。

值得庆幸的是，似乎您一直在使用不变的东西，这使更新嵌套类型变得相当容易。我相信您可以做：

return state.setIn(
    ['case', 'summaries', action.summary.id, 'metadata', 'summaryRank'],
    action.newRank
)

这也将根据需要根据需要创建键。