[英]How to get a generated document's ID in the firestore then add subcollection into it?
I am creating a todo-list, and I want to enable users to add the task in the list. 我正在创建一个待办事项列表,并且希望允许用户将任务添加到列表中。 However, I am troubled in getting document id.
但是,我在获取文档ID时遇到了麻烦。
Here are 2 methods I have tried: 这是我尝试过的2种方法:
this.currentUser = firebase.auth().currentUser;
const currentUserUid = this.currentUser.uid;
let collectionPath = "/userProfile/" + currentUserUid + "/list";
this.list = firebase.firestore().collection(collectionPath).doc()
const listId = this.list.id;
this.ref = firebase.firestore().collection(collectionPath)
.doc(listId).collection("task")
Unlucky, this way createe a new document insteading of storing task into the list. 不幸的是,这种方式创建了一个新文档,而不是将任务存储到列表中。
Another method is: 另一种方法是:
this.currentUser = firebase.auth().currentUser;
const currentUserUid = this.currentUser.uid;
let collectionPath = "/userProfile/" + currentUserUid + "/list";
this.list = firebase.firestore().collection(collectionPath)
.get().then((snapshot) => {
snapshot.docs.forEach(doc => {
return doc.data();
})
})
const listId = this.list.id;
this.ref = firebase.firestore().collection(collectionPath)
.doc(listId).collection("task")
But it said listId is undefined. 但它说listId是未定义的。
Here is my firebase structure: 这是我的firebase结构:
User(Collection) - User1...
|
List(Collection) - List1...
|
(Expected)Task(Collection) - task1...
Amy suggestions? 艾米的建议? Thanks a lot!
非常感谢!
In order to get the document's ID I would suggest you take a look at this answer . 为了获得文档的ID,建议您看一下这个答案 。 Also maybe this may prove helpful.
同样也许这可能会有所帮助。 As for adding a subcollection to a document I would suggest you reading this question and the following documentation .
至于向文档中添加子集合,我建议您阅读此问题和以下文档 。
Let me know if these were helpful. 让我知道这些是否有帮助。
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