问题描述
我做了一个解析器,我的代码运行得很好。但是我想知道是否有任何方法可以在TS组件中进行refacto,因为我现在从解析器中获取了数据,但是任何时候我尝试擦除一些我认为现在无用的东西时,我的应用就会崩溃。 这是我的解析器:
@Injectable()
export class MatchTableListResolver implements Resolve<MatchTable[]> {
constructor(private readonly matchTablesService: MatchTablesService
) {}
resolve(route: ActivatedRouteSnapshot,_state: RouterStateSnapshot): Observable<MatchTable[]> {
console.log("inside resolver")
return this.matchTablesService.list().map(data => {
console.log("tata",data); return data});
}
}
以及我想在我的component.TS文件中重新引用的内容:
this.urlWatcher$ = this.route.data.pipe(
distinctUntilChanged(),withLatestFrom(this.matchTables$),map(([params,newMatchTables]) => {
this.page = 1;
this.startIndex = 0;
this.endindex = 50;
const matchTableFromParam = newMatchTables.find(m => m.technicalName === params['id']);
if (matchTableFromParam) {
this.matchTableSelected = matchTableFromParam;
this.selectLines(this.startIndex,this.endindex);
} else {
if(newMatchTables.length > 0) {
this.matchTableSelected = newMatchTables[0];
this.router.navigate(['/configuration/matchtables/' + this.matchTableSelected.technicalName]);
this.selectLines(this.startIndex,this.endindex);
}
}
})
);
this.matchTableList$ = this.matchTablesService.list().pipe(
map(matchTables => {
matchTables = matchTables.sort((a,b) => a.name.toLocaleLowerCase() === b.name.toLocaleLowerCase() ? 0 : a.name.toLocaleLowerCase() < b.name.toLocaleLowerCase() ? -1 : 1);
this.matchTables$.next(matchTables);
}),catchError( (error: HttpErrorResponse) => {
this.loadingError$.next(true);
return EMPTY;
})
);
concat(this.matchTableList$,this.urlWatcher$).subscribe();
因为我现在正在使用:
this.listMatchTable = this.route.snapshot.data.listMatchTable;
我不习惯使用解析器,但是我想现在我从解析器接收数据了,我应该能够使事情有所不同(也许摆脱可观察性?),但是我不知道从哪里开始。
解决方法
您可以使用快照字段从路由获取数据和参数
this.id = this.route.snapshot.params['id'];
this.listMatchTable = this.route.snapshot.data.listMatchTable;
然后,您可以在没有可观察对象的情况下实现逻辑
this.page = 1;
this.startIndex = 0;
this.endIndex = 50;
const matchTableFromParam = this.listMatchTable.find(m => m.technicalName === this.id);
if (matchTableFromParam) {
this.matchTableSelected = matchTableFromParam;
this.selectLines(this.startIndex,this.endIndex);
} else {
if(newMatchTables.length > 0) {
this.matchTableSelected = this.listMatchTable[0];
this.router.navigate(['/configuration/matchtables/' + this.matchTableSelected.technicalName]);
this.selectLines(this.startIndex,this.endIndex);
}
}