Question

我似乎无法弄清楚为什么我的db对象被返回为未定义，我在ts文件中使用.subscribe解压缩它，但无法访问其任何值。我想我必须遗漏与使用.child？

有关的事情

我称之为填充数据

test() {
    this.assessment.first = "test";
    this.assessment.second = "test";
    this.assessment.third = "test";
    this.assessment.education = 1;
    this.assessment.civic = 1;
    this.assessment.employment = 1;
    this.assessment.health = 1;
    this.assessment.housing = 1;
    this.assessment.social = 1;
    this.visionService.createAssessmentItem(this.assessment)
    console.log(this.assessment);
  }

然后在同一个ts文件中

assessment;

  constructor(private visionService: VisionService,
              public auth: AuthService) { }

  ngOnInit() {
    //this.assessments = this.visionService.getAssessment();

    this.assessment = this.visionService.getAssessment().subscribe(a => {
      this.assessment = a
    });
    console.log(this.auth.currentUser.uid);
    console.log(this.assessment);
  }

我打印用户ID以确保它们存在且实际上有数据。

我的服务

 getAssessment(): FirebaseObjectObservable<any> {
    const path = `/assessments/${this.userId}`
    console.log(this.userId) // make sure it matches.
    return this.db.object(path);
  }

并在db

中

0yUcmxq0Tig9TW3mCJWwGOo5c8l1
 -KqMjDGfbSb5qS2o0MIL
 civic: 1
 education: 1
 employment: 1
 first: "test"
 health: 1
 housing: 1
 second: "test"
 social: 1
 third: "test"

有人可以展示并解释最佳方法吗？老实说，这可能很难，我觉得我在这里缺少一些关键的东西。

Angularfire 2从DB对象获取未定义

0 个答案: