[英]Handle async promise before ngOnInit Angular
I have a request that returns data for a table, which needs to be handled like a promise to wait until the data has been loaded. 我有一个返回表数据的请求,该表需要像承诺一样等待,直到数据加载完毕。 In order to load the data into the table I have to use async/wait, but this messes up all other functions/methods.
为了将数据加载到表中,我必须使用异步/等待,但这会弄乱所有其他函数/方法。
How to store the data in currentList without using async/wait on ngOnInit()? 如何在不使用ngOnInit()上的异步/等待的情况下将数据存储在currentList中? Or is there an other way?
还是有其他方法?
async getEducationList(): Promise<any> {
return this.educationList = await this.applicationClient.getEducations()
.toPromise()
.then((res) => {
this.educationListAll = res;
});
}
async ngOnInit() {
await this.getEducationList();
this.currentList = this.educationListAll;
}
Note - this.applicationClient.getEducations() is an Observable 注意-this.applicationClient.getEducations()是可观察的
try this way 尝试这种方式
async ngOnInit() : Promise<void> {
this.currentList = await this.applicationClient.getEducations().toPromise();
this.initTable(data);
}
initTable(data) {
// Some code to handle the data
}
Solved the issue by wrapping the API call in an observable and then moved the code from ngOnInit to another function initTable. 通过将API调用包装在一个可观察的对象中,然后将代码从ngOnInit移到另一个函数initTable来解决此问题。
getEducationList(): Observable<Education[]> {
return this.applicationClient.getEducations();
}
initTable(data) {
// Some code to handle the data
}
ngOnInit() {
this.getEducationList().toPromise().then(data => {
this.loader = false;
this.initTable(data);
});
}
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