如何与ngrx一起创建或删除多个数据?
How to create or delete multiple data together with ngrx?
结合所有 "flux architecture"(actions
、effects
、reducers
等...)和 rxjs
我正在尝试创建和/或删除多个数据。
我有以下问题:
- 如何在后台和后台创建或删除多个数据
该州的实体?
- 我一直在研究,有人说要使用 forkJoin,但它怎么样
与通量架构一起使用?
- 如何实时接收这个数据,让其他请求等待
让他们到达?
这是我正在做的一个例子:
后端服务:
create(peoples: Array<IPeople>): Observable<Array<IPeople>> {
const https = [];
peoples.forEach((people) => https.push(this.httpClient.post<IPeople>(this.endpoint, people)));
return forkJoin([]);
}
效果
createAll$ = createEffect(() =>
this.action$.pipe(
ofType(fromPeopleActions.CREATE),
mergeMap((action) => {
return this.backend.create(action.people).pipe(
map((people) => fromPeopleActions.CREATE_SUCCESS({ people })),
catchError((error) => of(fromPeopleActions.CREATE_FAIL({ error: this.requestHandler.getError(error) })))
);
})
)
);
减速器:
const peopleReducer = createReducer(
INIT_STATE,
on(fromPeopleAction.GET_ALL_SUCCESS, fromPeopleAction.CREATE_SUCCESS, fromPeopleAction.DELETE_SUCCESS, (state, { peoples }) => adapter.addMany(peoples, { ...state, loading: false })),
on(fromPeopleAction.GET_ALL_FAIL, fromPeopleAction.CREATE_FAIL, fromPeopleAction.DELETE_FAIL, (state, { error }) => ({ ...state, error, loading: false }))
);
呼叫
ngOnInit(): void {
this.peopleDispatchService.getAll();
this.peopleSelectorsService.loading.subscribe((isLoading) => {
if (!isLoading) {
this.peopleSelectorsService.total.subscribe((total) => {
console.log(total);
if (total === 0) {
this.peopleDispatchService.create([
{ id: '0', isMain: true, name: 'THIAGO DE BONIS CARVALHO SAAD SAUD', avatar: 'assets/users/thiagobonis.jpg', messages: null },
{ id: '1', isMain: false, name: 'BILL GATES', avatar: 'assets/users/billgates.jpg', messages: null },
{ id: '2', isMain: false, name: 'STEVE JOBS', avatar: 'assets/users/stevejobs.jpg', messages: null },
{ id: '3', isMain: false, name: 'LINUS TORVALDS', avatar: 'assets/users/linustorvalds.jpg', messages: null },
{ id: '4', isMain: false, name: 'EDSGER DIJKSTRA', avatar: 'assets/users/dijkstra.jpg', messages: null },
])
} else {
this.peopleSelectorsService.allIds.subscribe((ids) => this.peopleDispatchService.delete(ids.toString()));
}
});
}
});
}
你几乎做对了
create(people: Array<IPeople>): Observable<Array<IPeople>> {
return forkJoin(
...people.map(person => this.httpClient.post<IPeople>(this.endpoint, person)),
);
}
另外 fromPeopleAction.DELETE_SUCCESS
和 addMany
放在一起听起来很奇怪。我会为它添加一个独立的on
。
现在创建将引起创建请求。
如何在后端和状态实体中创建或删除多个数据?
- 你的做法很好。
我一直在研究,有人说可以使用 forkJoin,但它如何与 flux 架构一起使用?
- 检查我上面的例子
如何实时接收这个数据,让其他请求等待他们到达?
- 更好的做法是让一个请求获取所有数据,然后将响应转换为许多操作,例如 ADD_MANY 等。或者如果您的后端不提供,则使用
forkJoin
用于批量数据交换的单一端点。
结合所有 "flux architecture"(actions
、effects
、reducers
等...)和 rxjs
我正在尝试创建和/或删除多个数据。
我有以下问题:
- 如何在后台和后台创建或删除多个数据 该州的实体?
- 我一直在研究,有人说要使用 forkJoin,但它怎么样 与通量架构一起使用?
- 如何实时接收这个数据,让其他请求等待 让他们到达?
这是我正在做的一个例子:
后端服务:
create(peoples: Array<IPeople>): Observable<Array<IPeople>> {
const https = [];
peoples.forEach((people) => https.push(this.httpClient.post<IPeople>(this.endpoint, people)));
return forkJoin([]);
}
效果
createAll$ = createEffect(() =>
this.action$.pipe(
ofType(fromPeopleActions.CREATE),
mergeMap((action) => {
return this.backend.create(action.people).pipe(
map((people) => fromPeopleActions.CREATE_SUCCESS({ people })),
catchError((error) => of(fromPeopleActions.CREATE_FAIL({ error: this.requestHandler.getError(error) })))
);
})
)
);
减速器:
const peopleReducer = createReducer(
INIT_STATE,
on(fromPeopleAction.GET_ALL_SUCCESS, fromPeopleAction.CREATE_SUCCESS, fromPeopleAction.DELETE_SUCCESS, (state, { peoples }) => adapter.addMany(peoples, { ...state, loading: false })),
on(fromPeopleAction.GET_ALL_FAIL, fromPeopleAction.CREATE_FAIL, fromPeopleAction.DELETE_FAIL, (state, { error }) => ({ ...state, error, loading: false }))
);
呼叫
ngOnInit(): void {
this.peopleDispatchService.getAll();
this.peopleSelectorsService.loading.subscribe((isLoading) => {
if (!isLoading) {
this.peopleSelectorsService.total.subscribe((total) => {
console.log(total);
if (total === 0) {
this.peopleDispatchService.create([
{ id: '0', isMain: true, name: 'THIAGO DE BONIS CARVALHO SAAD SAUD', avatar: 'assets/users/thiagobonis.jpg', messages: null },
{ id: '1', isMain: false, name: 'BILL GATES', avatar: 'assets/users/billgates.jpg', messages: null },
{ id: '2', isMain: false, name: 'STEVE JOBS', avatar: 'assets/users/stevejobs.jpg', messages: null },
{ id: '3', isMain: false, name: 'LINUS TORVALDS', avatar: 'assets/users/linustorvalds.jpg', messages: null },
{ id: '4', isMain: false, name: 'EDSGER DIJKSTRA', avatar: 'assets/users/dijkstra.jpg', messages: null },
])
} else {
this.peopleSelectorsService.allIds.subscribe((ids) => this.peopleDispatchService.delete(ids.toString()));
}
});
}
});
}
你几乎做对了
create(people: Array<IPeople>): Observable<Array<IPeople>> {
return forkJoin(
...people.map(person => this.httpClient.post<IPeople>(this.endpoint, person)),
);
}
另外 fromPeopleAction.DELETE_SUCCESS
和 addMany
放在一起听起来很奇怪。我会为它添加一个独立的on
。
现在创建将引起创建请求。
如何在后端和状态实体中创建或删除多个数据?
- 你的做法很好。
我一直在研究,有人说可以使用 forkJoin,但它如何与 flux 架构一起使用?
- 检查我上面的例子
如何实时接收这个数据,让其他请求等待他们到达?
- 更好的做法是让一个请求获取所有数据,然后将响应转换为许多操作,例如 ADD_MANY 等。或者如果您的后端不提供,则使用
forkJoin
用于批量数据交换的单一端点。