firebase 从实时数据库中删除特定项目

Question

don't know how to make user abele to delete his own comment in android studio using java

all comments played at list

need user to press button delete to delete his comment

and no one can delete comment not his

[![this is my data structure]

Answer 1

Solution1: Add a user's uid in the comment. Use that uid to match the current logged-in user's uid to show delete button in your UI. data structure for comments: [{uid, name, photoUrl, rating, text}]

Solution2: The above way should work but essentially all users had delete access to anyone's comment.. it's just that you're not showing the mechanism in UI. for better security I guess you should look at https://firebase.google.com/docs/database/security something like should work

{
  "rules": {
    "items": {
      "$item_id" : {
        "comments": {          
          "$comment_id": {            
            ".read": "auth != null",
            ".write": "auth != null && (data.child('uid').exists() ? (data.child('uid').val() == auth.uid) : true)"
          }
        }
      }
    }
  }
}