Firebase允许拒绝(Permission denied with Firebase)

 我希望我的应用程序的用户有权访问通过实时数据库访问的其他用户的配置文件。 我正在引用db via 
 
 ref.once('users/'+uid, snapshot => snapshot.child('users/'+uid).val()) 
 
 我有的规则： 
 
{
  "rules": {
    "users": {
      ".read": true,
      "$uid": {
        ".write": "$uid === auth.uid"
      },
   },
}
 
 我不知道为什么我无法访问users/:uid即使模拟器通过勾选read并运行<firebaseURL>/users上的模拟来提供success消息。 
 
 如果我设置".read": true"在rules下它确实允许我读取数据，但如果我想要实现我不希望未经授权的用户可用的内容，这可能会".read": true"我的注意。 
 
 编辑（解决方案）： 
 
 问题在于引用firebase。 而不是firebase.database.ref('users')我通过firebase.database.ref()引用了root本身。 
 
 该引用导致应用默认read/write规则。 

I want users of my app to have access to see profile of other users that is accessed via real-time database. I'm referencing to db via 
 
ref.once('users/'+uid, snapshot => snapshot.child('users/'+uid).val()) 
 
Rules i have:
 
{
  "rules": {
    "users": {
      ".read": true,
      "$uid": {
        ".write": "$uid === auth.uid"
      },
   },
}
 
I don't get why i can't access users/:uid even though simulator gives success message by ticking read and running simulation on <firebaseURL>/users.
 
If i set ".read": true" under rules it does allow me to read the data, but that may bait me later on if i would want to implement stuff that i don't want to be available to unauthorized users.
 
Edit (solution):
 
The problem was with referencing to firebase. Instead of firebase.database.ref('users') I was referencing too root itself by firebase.database.ref(). 
 
That reference caused to apply default read/write rules.

原文：https://stackoverflow.com/questions/45217092