如何将值/条目添加到firebase集合中的字段

Question

Firebase DB

My code trying to addtodo error on console once i click add to do

只是想知道有没有人知道我将如何将我的 addtodo 存储在我的 todolist 字段中的 house 子集合中 `

todo_title:string;
  todo_description: string;
  todo_last_date: Date;
  todo_owner: string;

  constructor(private navCtrl: NavController, private toastCtrl:ToastController) { 
  this.todo_owner = firebase.auth().currentUser.uid;
  }
  ngOnInit() {

    firebase.firestore().collection("house").doc("this.house.id").collection("toDoList").add({
      title: this.todo_title,
      description: this.todo_description,
      last_date: this.todo_last_date,
      owner: this.todo_owner,
      created: firebase.firestore.FieldValue.serverTimestamp
      ()
    }).then((docRef) => {
      this.toastCtrl.create({
        message: "toDo has been added!",
        duration: 2000
      }).then((toast) => {
        toast.present();
        this.navCtrl.navigateBack
      })
       }).catch((err) => {
         this.toastCtrl.create({
           message: "ToDo has been Added",
           duration: 3000
         }).then((toast) => {
           toast.present();
         })
         })
       }

  }`

Answer 1

错误告诉你你传递给title的值（你传递给add()方法的对象的属性）是未定义的。所以，换句话说，this.todo_title 似乎是undefined。

---

另外，我认为你应该这样做：

firebase.firestore().collection("house").doc(this.house.id).collection("toDoList").add(...)

注意doc(this.house.id) 而不是doc("this.house.id")：使用后者你传递一个值为"this.house.id" 的字符串。