不是功能问题

Question

我正在面对Ionic Framework上的经典“ Not a Function”问题，希望您能帮助我更好地理解这种情况。

我试图从数组中找出一个对象。 该对象具有私有属性，可以使用简单的getter方法检索该私有属性。

当执行以上整个类的这一行时，就会出现问题：

this.selectedWorkoutPlan = this.workoutPlanList.find(object => object.getId() === this.id);

控制台返回前面提到的错误。

这是我的.ts文件：

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import {WorkoutPlanService} from "../../services/workout-plan.service";
import {WorkoutPlan} from "../../models/workout-plan";

@IonicPage()
@Component({
  selector: 'page-workout-plan-detail',
  templateUrl: 'workout-plan-detail.html',
})
export class WorkoutPlanDetailPage {

  id: number = 0;
  title: string = "";
  startDate: Date = new Date();
  endDate: Date = new Date();

  workoutPlanList: WorkoutPlan[] = [];
  selectedWorkoutPlan: WorkoutPlan = new WorkoutPlan();

  constructor(public navCtrl: NavController, public navParams: NavParams,
              private workoutPlanService: WorkoutPlanService) {
  }

  ionViewDidLoad() {
    this.id = this.navParams.get("id");
    this.workoutPlanList = this.workoutPlanService.getWorkoutPlanList();
    this.selectedWorkoutPlan = this.workoutPlanList.find(object => object.getId() === this.id);
  }

}

这是.ts模型的类。

import {WorkoutExercise} from "./workout-exercise";

export class WorkoutPlan {

  private title: string;
  private exercises: WorkoutExercise[];
  private startDate: Date;
  private endDate: Date;
  private id: number;

  constructor() {
    this.id = new Date().getTime();
  }

  setTitle(newTitle: string) {
    this.title = newTitle;
  }

  setExercises(newExercises: WorkoutExercise[]) {
    this.exercises = newExercises;
  }

  setStartDate(newStartDate: Date) {
    this.startDate = new Date(newStartDate);
  }

  setEndDate(newEndDate: Date) {
    this.endDate = new Date(newEndDate);
  }

  setId(newId: number) {
    this.id = newId;
  }

  getTitle() {
    return this.title;
  }

  getExercises() {
    return this.exercises;
  }

  getStartDate() {
    return this.startDate;
  }

  getEndDate() {
    return this.endDate;
  }

  getId() {
    return this.id;
  }

}

我在语法中缺少什么吗？

在我看来，我认为一个数组的对象将同时具有属性和方法，不是吗？

在此先感谢您的时间。

Answer 1

我的猜测是，你可能会被序列化的WorkOutPlan某处对象中WorkoutPlanService然后解析字符串回WorkOutPlan对象，这会导致你失去了相关的方法。

您是否随时对这些对象进行字符串化？