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How to stop Firebase Realtime Database Unity SDK listener load all child data at start of application


How to stop Firebase Realtime Database Unity SDK listener load all child data at start of application

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How to stop Firebase Realtime Database Unity SDK listener load all child data at start of application
Tag : chash , By : Der Ketzer
Date : November 24 2020, 05:49 AM

this will help I had a similar requirement in my project where I wanted to get only the latest chat messages to a user joining an already active chatroom. I used timestamps to build a robust solution for this.
Database design:
FirebaseDatabase.DefaultInstance.GetReference("Timestamp").RunTransaction(mutableData =>
{
    mutableData.Value = ServerValue.Timestamp;
    return TransactionResult.Success(mutableData);
})
.ContinueWith(task => 
{
    long currentTimestamp = (long)(task.Result.Value);
    //Use this timestamp in the next step
});
logR.OrderByChild("timestamp").StartAt(currentTimestamp).ChildAdded += HandleChildAdded;

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Retrieve child data from firebase realtime database


Tag : firebase , By : jrf
Date : March 29 2020, 07:55 AM
Hope this helps I'm assuming that you also have a path for your user data, such as "/users/". The data for the user record would therefore be returned by looking at "users/LlMNVWXvzLhmP24AKVciM2PvPVy2", for example.
The point of indexing your records as you've done by indicating which users are associated with a customer is just to make it easier to fetch data later on, particularly as your database scales.
"users":{
  "LlMNVWXvzLhmP24AKVciM2PvPVy2":{
    "customer" : "1510925e-0541-474f-93c1-10890934fda9"
  }
  "Q4sM188BgwRGYhJUiLDqgAzGGX72":{
    "customer" : "634f6b10-1def-496d-af44-834ae3c69c27"
  }
  ...for many, many records...
}

Application is consuming power in the background if I set listener for Firebase Realtime Database in Android


Tag : android , By : Paul Schwarz
Date : March 29 2020, 07:55 AM
it fixes the issue In order to stop this from happening, you need to remove the listener accordingly to the life-cycle of your activity. So, please use the following line of code:
databaseReference.removeEventListener(valueEventListener);

Firebase Realtime Database can you remove Listener when Listener is called


Tag : android , By : nobodyzzz
Date : March 29 2020, 07:55 AM
Does that help I can't really tell what exactly your condition is really trying to express, but if you want just a single value a single time from the database (without listening to its changes over time), you can simply use addListenerForSingleValueEvent() to get a single snapshot of a node in the database.
If you're waiting for a value to appear that wasn't previously there, and you want to stop listening at the time it appears, what you're doing is fine. But you might want to listen more closely to the child of interest instead of its parent.

How to retrieve child data from firebase realtime database on Swift 5


Tag : swift , By : wraith
Date : March 29 2020, 07:55 AM
this will help I am facing with firebase problem for 2 days and couldn't handle it. , Assuming you have multiple posts like this
posts
   0
      tags
         0: 100
         1: 200
   1
      tags
         0: 100
         1: 200
func readPostTags() {
    let postsRef = self.ref.child("posts")
    postsRef.observe(.childAdded, with: { snapshot in
        let content = snapshot.childSnapshot(forPath: "creation_date").value as! String
        let tagsSnap = snapshot.childSnapshot(forPath: "tags")
        let allChildTagsSnap = tagsSnap.children.allObjects as! [DataSnapshot]
        for tagChildSnap in allChildTagsSnap {
            let key = tagChildSnap.key
            let value = tagChildSnap.value as! Int
            print(content, key, value)
        }
    })
}
0 100
1 200
0 100
1 200

How to listener on realtime firebase database for get data dynamically by backend laravel and websocket ,without use jav


Tag : php , By : Al Dimond
Date : March 29 2020, 07:55 AM
I hope this helps you . While the Firebase Realtime Database uses web sockets to communicate between the server and its SDKs, this protocol is not documented. The closest you can get with a public API, is to implement Firebase's REST Streaming API.
But you'll have a much easier time if you stick to one of the supported server-side or client-side SDKs. For the server-side such SDKs currently exists for Java, Node.js, Python, and Go.
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