Angular {{row.contact}} 电子邮件 {{row.email} 持有 硬币 霍尔丁 行动
好的,经过一些自我回忆,我发现我不仅需要订阅@effects才能在mat表中显示EmployeeModel[],还应该在订阅中实例化UserDataSource。我从未想过会错过这一个,希望也能帮助其他人 .将对其进行进一步测试…见下文 @user1.component.tsAngular {{row.contact}} 电子邮件 {{row.email} 持有 硬币 霍尔丁 行动,angular,material-design,ngrx-store,ngrx-effects,Angular,Material Design,Ngrx Store,Ngrx Effects,好的,经过一些自我回忆,我发现我不仅需要订阅@effects才能在mat表中显示EmployeeModel[],还应该在订阅中实例化UserDataSource。我从未想过会错过这一个,希望也能帮助其他人 .将对其进行进一步测试…见下文 @user1.component.ts @Component({ selector: "app-user1", templateUrl: "./user1.component.html", styleUrls: ["./user1.component
@Component({
selector: "app-user1",
templateUrl: "./user1.component.html",
styleUrls: ["./user1.component.scss"]
})
export class User1Component implements OnInit {
displayedColumns = ["firstName", "lastName", "contact", "email", "actions"];
displayedtransColumns = ["coin", "holdings", "price", "action"];
userDatabase: EmployeeModel[] = [];
dataSource: any | null;
index: number;
id: string;
selectedUserId: string;
users: Array<EmployeeModel> = [];
transactionListSub: Subscription;
transactionList: Observable<any>;
employees$: Observable<EmployeeModel[]>;
constructor(
public store: Store<fromStore.UserState>,
public httpClient: HttpClient,
public dialog: MatDialog
) {}
@ViewChild(MatPaginator) paginator: MatPaginator;
@ViewChild(MatSort) sort: MatSort;
@ViewChild("filter") filter: ElementRef;
ngOnInit() {
//dispatch action to load employees
this.loadData();
}
public loadData() {
/* this.store.select("employees").subscribe(state => {
console.log("Store state: " + state.);
});
*/
console.log("userDatabase from store: " + this.userDatabase);
this.store.select(fromStore.getAllEmployees).subscribe(arr => {
console.log("fromStore.getAllEmp: " + arr);
this.userDatabase = arr;
console.log("dataSource: " + this.userDatabase.length);
});
this.dataSource = new UserDataSource(
this.userDatabase,
this.paginator,
this.sort
);
this.store.dispatch(new fromStore.LoadEmp());
Observable.fromEvent(this.filter.nativeElement, "keyup")
.debounceTime(1000)
.distinctUntilChanged()
.subscribe(() => {
if (!this.dataSource) {
return;
}
this.dataSource.filter = this.filter.nativeElement.value;
});
}
addTransactionDialog() {
const dialogRef = this.dialog.open(AddDialogComponent, {
width: "300px"
});
dialogRef.afterClosed().subscribe(result => {
console.log(result);
});
}
}
export class UserDataSource extends DataSource<EmployeeModel> {
_filterChange = new BehaviorSubject("");
get filter(): string {
return this._filterChange.value;
}
set filter(filter: string) {
this._filterChange.next(filter);
}
filteredData: EmployeeModel[] = [];
renderedData: EmployeeModel[] = [];
constructor(
public _userDatabase: any,
public _paginator: MatPaginator,
public _sort: MatSort
) {
super();
// Reset to the first page when the user changes the filter.
this._filterChange.subscribe(() => (this._paginator.pageIndex = 0));
}
/** Connect function called by the table to retrieve one stream containing the data to render. */
connect(): Observable<EmployeeModel[]> {
// Listen for any changes in the base data, sorting, filtering, or pagination
const displayDataChanges = [
this._userDatabase,
this._sort.sortChange,
this._filterChange,
this._paginator.page
];
console.log("fromDatasource: " + this._userDatabase);
return Observable.merge(...displayDataChanges).map(() => {
// Filter data
this.filteredData = this._userDatabase
.slice()
.filter((user: EmployeeModel) => {
const searchStr = (user._id +
user.firstName +
user.lastName +
+user.contact,
user.email).toLowerCase();
return searchStr.indexOf(this.filter.toLowerCase()) !== -1;
});
// Sort filtered data
const sortedData = this.sortData(this.filteredData.slice());
// Grab the page's slice of the filtered sorted data.
const startIndex = this._paginator.pageIndex * this._paginator.pageSize;
this.renderedData = sortedData.splice(
startIndex,
this._paginator.pageSize
);
return this.renderedData;
});
}
disconnect() {}
/** Returns a sorted copy of the database data. */
sortData(user: EmployeeModel[]): EmployeeModel[] {
if (!this._sort.active || this._sort.direction === "") {
return user;
}
return user.sort((a, b) => {
let propertyA: number | string = "";
let propertyB: number | string = "";
switch (this._sort.active) {
case "_id":
[propertyA, propertyB] = [a._id, b._id];
break;
case "firstName":
[propertyA, propertyB] = [a.firstName, b.firstName];
break;
case "lastName":
[propertyA, propertyB] = [a.lastName, b.lastName];
break;
case "contact":
[propertyA, propertyB] = [a.contact, b.contact];
break;
case "email":
[propertyA, propertyB] = [a.email, b.email];
break;
}
const valueA = isNaN(+propertyA) ? propertyA : +propertyA;
const valueB = isNaN(+propertyB) ? propertyB : +propertyB;
return (
(valueA < valueB ? -1 : 1) * (this._sort.direction === "asc" ? 1 : -1)
);
});
}
}
//dispatch action first
this.store.dispatch(new fromStore.LoadEmp());
console.log("userDatabase from store: " + this.userDatabase);
//then subscribe to selector of effect in order to convert observable response into EmployeeModel[] and instantiate the Datasource inside
this.store.select(fromStore.getAllEmployees).subscribe(arr => {
console.log("fromStore.getAllEmp: " + arr);
this.userDatabase = arr;
this.dataSource = new UserDataSource(
this.userDatabase,
this.paginator,
this.sort
);
console.log("dataSource: " + this.userDatabase);
});
请注意,这是将组件分为容器组件和表示组件的一个很好的理由。在这种情况下,容器组件可以将
.select(getAllEmployees)
返回的可观察对象发出的值作为@Input()
属性传递给表示组件,使用异步管道订阅/取消订阅可观察对象。
//dispatch action first
this.store.dispatch(new fromStore.LoadEmp());
console.log("userDatabase from store: " + this.userDatabase);
//then subscribe to selector of effect in order to convert observable response into EmployeeModel[] and instantiate the Datasource inside
this.store.select(fromStore.getAllEmployees).subscribe(arr => {
console.log("fromStore.getAllEmp: " + arr);
this.userDatabase = arr;
this.dataSource = new UserDataSource(
this.userDatabase,
this.paginator,
this.sort
);
console.log("dataSource: " + this.userDatabase);
});