使用userId获取用户信息

本文介绍了使用userId获取用户信息-Angular Firestore的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有2个不同的收藏集:

I've got 2 different collections:

• 用户:姓名，电子邮件和头像(来自其社交网络)
• 配方:用户可以创建的文档.它还包含userId及其对先前集合的引用

• Users: name, email and avatar (taken from their social network)
• Recipes: documents that the user can create. It also contains userId with their references to previous collection

要在我的页面上显示这些食谱，我使用:

To display these recipes on my page I use:

this.recipes = collection.snapshotChanges().map(actions => { return actions.map(action => ({ $id: action.payload.doc.id, ...action.payload.doc.data() })); });

并且:

<ion-card *ngFor="let recipe of recipes | async; let i = index"> ...

同时获得用户头像和姓名的最佳方法是什么?

What's the best way to get also the user avatar and name?

推荐答案

尝试此代码

this.recipes = collection.snapshotChanges().map(actions => { return actions.map(a => { const data = a.payload.doc.data(); const id = a.payload.doc.id; //this.afs.collection('users') is the ref to users collection, yours should be different return this.afs.collection('users').doc(data.userId).snapshotChanges().map(userActions=>{ return userActions.payload.data(); }).map(user=>{ return { id:id, userName:user.name, ...data }; }) }); }).flatMap(merge => ObservablebineLatest(merge)).map(data => { return [].concat(...data).map(d => { return d; }) });