在Firebase上获取用户Uid字典

Question

这是我的情况；我需要一个应用程序中所有用户的字典，才能在didSelectRowAt上使用UITableView来获取搜索到的用户uid。 我的firebase数据库的设计如下： 不允许上传图片，请在此处链接

此外，我通过执行此操作成功创建了string/dictionary个用户名；

        let rootRef = Database.database().reference()
    let query = rootRef.child("users").queryOrdered(byChild: "users")
    query.observe(.value) { (snapshot) in
        for child in snapshot.children.allObjects as! [DataSnapshot] {
            if let value = child.value as? NSDictionary {
               // declaring a user in class User() which was made with strings(name, email, ect.)
            let user = User()

            let name = value["name"] as? String ?? "name not found"
            // making the string of it go into the user.name
            user.name = name
            // appending it into a variable of class user()
            self.users.append(user)
            }
     }
}

我不确定该怎么做，因为uid's都不同，并且没有名称(ex. email: test@test.com).

也许我需要重组数据库以允许这样做，但是我不太确定。感谢您的帮助！

Answer 1

一种方法是保留uid字段以及名称，电子邮件和profileImageURI字段。

let rootRef = Database.database().reference()
guard let uid = rootRef.child("users").childByAutoId().key

现在，将uid作为字段发送，同时将数据保存到firebase。 检索数据时，您可以按以下方式映射数据：

let query = rootRef.child("users").queryOrdered(byChild: "users")
query.observe(.value) { (snapshot) in
    for child in snapshot.children.allObjects as! [DataSnapshot] {
        if let value = child.value as? NSDictionary {
           // declaring a user in class User() which was made with strings(name, email, etc.)
        var dict = [String:String]()
        let user = User()
        let name = value["name"] as? String ?? "name not found"
        // making the string of it go into the user.name
        user.name = name
        user.uid = value["uid"]
        dict[name] = "\(uid)"
        }
 }