Angular 4と@ngrx 4を使用してWebアプリケーションを作成していますが、Store
の戻り値型に問題があります。これは、私が使用しているコンポーネントであるStore
:@ngrx 4 store return type
Store
などを作成するので、私は
store.select
から取得する観察者は、
State
インタフェースに入力する必要がありますドキュメントの理解ができるものから、
export class ProductEditComponent implements OnInit, OnDestroy {
categoryMap: Map<number, Node>;
categoryObs$: Observable<State>;
categoryObsSubscription;
constructor(private store: Store<State>) { }
ngOnInit() {
// Retrieve data from the backend.
this.categoryObs$ = this.store.select('productTree');
this.categoryObsSubscription = this.categoryObs$.subscribe((res: State) => {
this.categoryMap = res.productTree;
}, (error) => {
console.error(error);
});
this.store.dispatch(new productTreeActions.LoadProductTreeAction(1));
}
ngOnDestroy() {
this.categoryObsSubscription.unsubscribe();
}
}
:私が選択したStore
(this.categoryObs$ = this.store.select('productTree');
)に私の観察可能なを割り当てるしようとすると、store: Store<State>
はしかし、私はこのエラーを取得する:
Type 'Store<Map<number, Node>>' is not assignable to type 'Observable<State>'. Types of property 'operator' are incompatible. Type 'Operator<any, Map<number, Node>>' is not assignable to type 'Operator<any, State>'. Type 'Map<number, Node>' is not assignable to type 'State'. Property 'productTree' is missing in type 'Map<number, Node>'.
私はres
の値をチェックしており、それはState
クラスに対応しているので、何が間違っているのか分かりません。
export interface State {
productTree: Map<number, Node>;
errorMsg: string;
}
const initialState: State = {
productTree: new Map<number, Node>(),
errorMsg: ''
};
export function productTreeReducer(state = initialState, action: productTreeOperations.Actions): State {
switch (action.type) {
case productTreeOperations.LOAD_PRODUCT_TREE:
return initialState; // Reset state
case productTreeOperations.LOAD_PRODUCT_TREE_COMPLETE:
return { productTree: action.payload, errorMsg: '' };
case productTreeOperations.LOAD_PRODUCT_TREE_FAIL:
return { productTree: undefined, errorMsg: action.payload }
case productTreeOperations.DELETE_BRANCH:
return deleteBranch(action.payload, state);
case productTreeOperations.ADD_CHILD:
return addChild(action.payload.parent, action.payload.newChild, state);
default:
return state;
}
}
とアクション:
export const LOAD_PRODUCT_TREE = 'load-product-tree';
export const LOAD_PRODUCT_TREE_COMPLETE = 'load-product-tree-complete';
export const LOAD_PRODUCT_TREE_FAIL = 'load-product-tree-fail';
export const DELETE_BRANCH = 'delete-branch';
export const ADD_CHILD = 'add-child';
/**
* Loads tree from backend and resets current state.
*/
export class LoadProductTreeAction implements Action {
readonly type = LOAD_PRODUCT_TREE;
constructor (public payload: number) { }
}
/**
* Returns the loaded tree from the backend.
*/
export class LoadProductTreeCompleteAction implements Action {
readonly type = LOAD_PRODUCT_TREE_COMPLETE;
constructor (public payload: Map<number, Node>) { }
}
/**
* Returns an error that happened when the tree was being loaded from the backend.
*/
export class LoadProductTreeFailAction implements Action {
readonly type = LOAD_PRODUCT_TREE_FAIL;
constructor (public payload: string) { }
}
/**
* Deletes an entire branch of the tree (the current node and all child nodes).
*/
export class DeleteBranchAction implements Action {
readonly type = DELETE_BRANCH;
constructor (public payload: Node) { }
}
/**
* Adds a child to a node.
*/
export class AddChildAction implements Action {
readonly type = ADD_CHILD;
constructor (public payload: { parent: Node, newChild: Node }) { }
}
export type Actions = LoadProductTreeAction |
LoadProductTreeCompleteAction |
LoadProductTreeFailAction |
DeleteBranchAction |
AddChildAction;
をこの
selectFeature
を使用! –私はします!助けてくれて、私の事を明確にしてくれてありがとう! :) – Felipe