类型“{}"不可分配给类型“配置文件" [英] Type '{}' is not assignable to type 'Profile'

问题描述

我是打字稿的新手，遇到错误

I'm new to typescript and im getting the error

类型{}"不可分配给类型配置文件".

Type '{}' is not assignable to type 'Profile'.

在 this.profile 上我该如何解决这个问题?

on this.profile how can I fix this?

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import { AngularFireAuth } from 'angularfire2/auth';
import { AngularFirestore } from 'angularfire2/firestore';
import { Profile } from './../../models/profile';


@IonicPage()
@Component({
  selector: 'page-profile',
  templateUrl: 'profile.html',
})
export class ProfilePage {

    profile = {} as Profile;

    constructor(private afs: AngularFirestore, private afAuth: AngularFireAuth,
      public navCtrl: NavController, public navParams: NavParams) {
    }
    ionViewWillLoad() {
      this.afAuth.authState.take(1).subscribe(data => {
          let profileCollection = this.afs.collection('profiles').doc(`${data.uid}`).valueChanges();
          profileCollection.subscribe(profile => this.profile = profile);
      })
    }
  }

推荐答案

您的问题可能是您的 Profile 类型具有强制属性.您只需要将它们设为可选或将它们初始化为默认值.您不能将空对象分配给具有属性的类型.

Your problem here is that probably your Profile type has mandatory properties. You just have to either make them optional or initialize them to default values. You can’t assign an empty object to a type with properties.

你能做的也只是说 profile: Profile 而不初始化它.您仍在强制执行该类型.由于您只是在订阅内分配它，因此您不需要执行 {} 空对象分配.

What you can do is also just say profile: Profile without initialising it. You’re still enforcing the type. Since you are only assigning it inside the subscribe you don’t need to do the {} empty object assignment.

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