Angular8 rxjs 数组筛选基础问题

Question

已解决,应该在resolve守卫处用res.homeDatas[0]取值.

如下代码,line1输出数据如下图,line2输出undefined,line3当然无法比较. 该如何取值?

export type Project = {
    id: string;
    name: string;
    parentProjectId?: string;
}

ngOnInit() {
  this.activateInfo.data
  .pipe(map(res => {
    return this.filterProject(res.homeDatas,this.projectId)
  }))
  }

  filterProject(projects: Project[], projectId: string) {
    return projects.filter((someworkbook: Project) => {
      console.log(someworkbook); //line1
      console.log(someworkbook.parentProjectId); //line2
      if ( someworkbook.parentProjectId === projectId) { //line3
        console.log('===> true');
        return true;
      }
      console.log('===> false');
      return false;
    });
  }

Answer 1

已解决!

应该在resolve守卫处用res.homeDatas[0]取值.