使用caseInSensitive在Firebase中保存和/或查询用户显示名称？ [英] Saving and/or Querying User Display Names in Firebase using caseInSensitive?

问题描述

我要将我的项目从Swift移到Firebase。 Firebase用户没有用户名，但我允许他们保存显示名称，该显示名称的作用更像是属性而不是实际对象。我该如何使用户使用敏感文本中的大小写来查询其他用户/朋友？

I'm moving my project over to Firebase from Swift. Firebase user's don't have usernames but I'm allowing them to save a display name which works more like a attribute than an actual object. How can I get users to query for other users/"friends" using case in sensitive text?

推荐答案

您可以轻松地完成此操作任务。我们不知道您当前数据的结构，但这是一个示例

You can easily accomplish this task. We don't know how your current data is structured but here's an example

users
  user_id_0
    dsplay_name: "Smokey"
    lower_case_name: "smokey"
  user_id_1
    display_name: "Bandit"
    lower_case_name: "bandit"

在Firebase中创建用户时，请在/ users节点中创建一个节点，其uid为节点名称，然后将display_name和lower_case_name用作子节点

When you create a user in Firebase, create a node in the /users node with their uid as the node name, and then display_name and lower_case_name as children

当您将数据写入用户节点时，在写入lower_case_name子级时，将显示名称小写：

When you write your data to the users node, just lower case the display name when you are writing to the lower_case_name child:

let lowerCaseString = displayNameString.lowercaseString
let userRef = the users uid

let userData = ["display_name": "Bandit", "lower_case_name": lowerCaseString]
userRef.setValue(userData)

然后您使用小写的字符串。

Then you query on the lower_case_name child using a lower case string.

ref.queryOrderedByChild("lower_case_name").queryEqualToValue("bandit")
   .observeEventType(.ChildAdded, withBlock: { snapshot in
}

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