我收到一个奇怪的错误，当我控制台记录我的数组值时，它返回为[object Set]。我不确定这是发生在组件还是服务中，但我没有将对象作为值。
当从组件调用deleteRow函数并将其传递给服务时，就会发生这种情况。
视图组件.ts
@Component({
templateUrl: "viewpage.component.html"
})
export class ViewpageComponent implements AfterViewInit, OnInit, OnDestroy {
viewData: any;
viewName: string;
viewTag: number;
fetchedData: any;
dataSource: ViewDataSource;
pageSizeOptions: number[] = [10, 20, 50];
defaultSortCol = "1";
@ViewChild(MatSort) sort: MatSort;
@ViewChild(MatPaginator) paginator: MatPaginator;
selection = new SelectionModel<TableRow>(true, []);
displayedColumns: string[] = [];
navSub: any;
primaryTableValue: any;
constructor(
private actionService: ActionService,
private route: ActivatedRoute,
private router: Router
) {}
ngOnInit() {
// Init the component the first time it is navigated to.
this.initData();
// Subscribe to the router, so that any new navigation to this component loads new data.
this.navSub = this.router.events.subscribe((e: any) => {
if (e instanceof NavigationEnd) {
this.initData();
}
});
}
initData() {
this.viewTag = +this.route.snapshot.paramMap.get("tag");
this.dataSource = new ViewDataSource(this.actionService);
// if (this.viewData) {
// console.log(this.viewData);
// }
// Load the View from the DataSource with default params
this.dataSource.loadView(this.viewTag, 0, 10, this.defaultSortCol, "asc");
// Subscribe to the View in the DataSource
this.dataSource.view.subscribe(x => {
if (x.ActionName) {
x.ColumnIds.unshift("9");
this.viewData = x;
this.fetchedData = this.viewData.TableData;
this.primaryTableValue = (this.viewData.ViewData.DbrAction.PrimaryTable);
}
});
}
ngAfterViewInit() {
// After sorting, jump back to first page of newly sorted data.
this.sort.sortChange.subscribe(() => {
this.paginator.pageIndex = 0;
});
// Sort changes and pagination events should reload the page.
merge(this.sort.sortChange, this.paginator.page)
.pipe(tap(() => this.loadPage()))
.subscribe();
}
loadPage() {
this.dataSource.loadView(
this.viewTag,
// '',
this.paginator.pageIndex,
this.paginator.pageSize,
this.sort.active,
this.sort.direction
);
}
/** Whether the number of selected elements matches the total number of rows. */
isAllSelected() {
const numSelected = this.selection.selected.length;
const numRows = this.dataSource.view['source']['value'].TableData;
return numSelected === numRows.length;
}
/** Selects all rows if they are not all selected; otherwise clear selection. */
masterToggle() {
this.isAllSelected()
? this.selection.clear()
: this.dataSource.view['source']['value'].TableData.forEach((row: TableRow) =>
this.selection.select(row)
);
}
// Delete row functionality
deleteRow() {
this.selection.selected.forEach(item => {
const index: number = this.dataSource.view['source']['value'].TableData.filter (
(d: TableRow) => d === item
);
this.dataSource.view['source']['value'].TableData.splice(index, 1);
this.dataSource = new ViewDataSource(this.dataSource.view['source']['value'].TableData);
});
this.selection = new SelectionModel<TableRow>(true, []);
this.actionService.deleteRow(this.selection, this.primaryTableValue).subscribe(response => {
console.log("Success!");
});
}
view.service.ts
@Injectable({ providedIn: 'root' })
export class ActionService {
private actionSource = new BehaviorSubject<any>([]);
currentAction = this.actionSource.asObservable();
private refNumSubject = new BehaviorSubject<any>([]);
currentRef = this.refNumSubject.asObservable();
// private dataSource = new BehaviorSubject<any>([]);
// currentPrimaryNumber = this.dataSource.asObservable();
currentRefNumber: number;
// This is for saving states of views:
public stateMap: Map<string, ActionState>;
public refNumber: number;
viewData: any;
constructor(private http: HttpClient, private router: Router) {
// Init the stateMap
this.stateMap = new Map<string, ActionState>();
this.refNumber = 0;
}
// Http Options
httpOptions = {
headers: new HttpHeaders({
'Content-Type': 'application/json'
})
};
// Loads a page of an Action after retrieving data from the API.
// ##BOOKMARK
loadPage(actionTag: number, pageIndex: number, pageSize: number, sortCol: string, sortDirection: string): Observable<any> {
let user = JSON.parse(localStorage.getItem('currentUser'));
return this.http.post<any>('/actions/actionPage/',
{
SessionId: user.userEnv.sessionId,
ActionTag: { value: actionTag },
SortDirection: sortDirection,
SortCol: +sortCol,
PageIndex: pageIndex,
PageSize: pageSize,
Filter: ""
}).pipe(map(actionData => {
const actionObj = JSON.parse(actionData);
// Cacheing stuff:
// this.refNumSubject.next(this.refNumber);
// let actionState = new ActionState(this.refNumber++, actionTag, pageIndex, pageSize, +sortCol, sortDirection);
// this.cacheAction(actionState);
//
return actionObj;
}));
}
// Delete Row ##TEST
deleteRow(selection: any, primaryTable: any): Observable<any> {
const user = JSON.parse(localStorage.getItem('currentUser'));
const indices = [selection._selection].map((row: { value: any; }) => `${row}`);
console.log(`Session Id Value in Service: ` + user.userEnv.sessionId);
console.log(`Primary Table Value in Service: ` + primaryTable);
console.log(`Row Selection Value in Service: ` + indices);
return this.http.post<any>('/actions/deleteRow/',
{
sessionId: user.userEnv.sessionId,
table: primaryTable,
Tag: indices
}).pipe(map(deleteRowObject => {
const deleteRowReturn = JSON.parse(deleteRowObject);
console.log(`test delete ` + deleteRowReturn);
return deleteRowReturn;
}));
}
'[object object]'由于+运算符，它调用对象的toString方法
像这样使用：
console.log('scope is ' + scope);
Produced the string scope is [object object]
相反，使用带有逗号的console.log((方法可以打印对象
console.log('scope is', scope)