我有一个具有属性会话的状态对象,该属性可以是对象或null.
我不想对isSessionActive()getter进行脏检查,所以我想使用computedFrom().但是,当此对象更改时,computerFrom()似乎不会触发,除非之前未定义.
如果我的州商店没有专门的isSessionActive布尔属性,我可以这样做吗?
@autoinject
export class Home {
firstName: string = "user";
private state: State;
constructor(private store: Store) {
store.state.subscribe(
response => this.state = response
)
}
@computedFrom('state.activeSession')
get isSessionActive() {
return this.state.activeSession !== null;
}
}
最佳答案
我最后只是做了以下事情:
isSessionActive: boolean = false;
constructor(private store: Store) {
store.state.subscribe(
response => {
this.state = response;
this.isSessionActive = response.activeSession !== null;
}
)
}