英文:
rxjs iif operator with multiple conditions
问题
这是我目前的代码设置：
iif(
() => !this.id,
this.service.listStuff$(),
this.service.listStuffById$(this.id)
).pipe(
switchMap((list: List) => {
// ...
})
).subscribe();
我想根据另一个条件 this.name 来添加条件，如下所示：
if (this.id) {
return this.service.listStuffById$(this.id)
} else if (this.name) {
return this.service.listStuffByName$(this.name)
} else {
return this.service.listStuff$()
}
最好的解决方案是否是链式使用两个 iif？
英文:
What is the best way to return Observables based on multiple conditions?
This is how my code is set up right now:
iif(
() => !this.id,
this.service.listStuff$(),
this.service.listStuffById$(this.id)
).pipe(
switchMap((list: List) => {
// ...
})
).subscribe();
I want to add another condition this.name such that
if (this.id) {
return this.service.listStuffById$(this.id)
} else if (this.name) {
return this.service.listStuffByName$(this.name)
} else {
return this.service.listStuff$()
}
Would the best solution be to chain two iifs?
答案1
得分: 2
你可以随时嵌套 iif 调用，因为 ObserveableInput 类型也是 Observable。
英文:
You can always nest the iif calls, since ObserveableInput types are also Observables.
iif(
() => this.id,
// if (this.id) {
this.service.listStuffById$(this.id),
iff(
() => this.name,
// } else if (this.name) {
this.service.listStuffByName$(this.name),
// } else {
this.service.listStuff$()
// }
)
).pipe(
switchMap((list: List) => {
...
}),
).subscribe();
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