Firebase : Read-only & non-realtime mode activated

问题:

Read-only & non-realtime mode activated to improve browser performance

Message pops up in my project and I'm unable to delete the nodes as well

Also I read this https://groups.google.com/forum/#!topic/firebase-talk/qLxZCI8i47s

Which states :

If you have a lot of nodes in your Firebase (say thousands), we need to create a new element for each node and modern browsers simply have limitations of how many DOM elements you can add to a page

It says:

To resolve this problem, don't load your Firebase Dashboard at the root of your Firebase, but instead load it lower down in the hierarchy

I do not get what it means

How do I get back to my Realtime Dashboard?

回答1:

When it detects that it's downloading too many nodes from your database, the Firebase Console stops using real-time mode and switches to read-only mode. In this mode it requires less work from the browser, so it is more likely that the browser will stay performant.

To get back to realtime mode, you have to go to a location that has fewer nodes. So say that you start loading the database at the root, that means that "pseudo address bar" at the top of the data tree will say:

https://<your-project>.firebaseio.com/

And then will show the list of items. Now click on the URL in that pseudo address bar and change it to:

https://<your-project>.firebaseio.com/<one-of-your-keys>

And hit enter. The data tree will reload with just the node from one-of-your-keys and down and will likely switch to realtime mode again.

回答2:

If you want to delete a high level node when this is activated, I recommend doing this.

Open up a text editor and type in { }. Save this file as "blankJSON.json".

Go to high level node you want deleted and select it, once it opens up and shows you all the nodes that need to be removed, select the three bars at the top right and select "Import JSON", (It would be safe to first "Export JSON" If you don't have backups, in case you make a mistake here). Import the JSON file we created earlier titled "blankJSON".

This will delete all of the data inside.

Once again, I highly suggest you make a backup before doing this, It's extremely easy to make a backup and also it is much easier than you would think to upload this blankJSON to the wrong node and then erasing a bunch of important data.

回答3:

Every node key in firebase is a link, you can open a sub-node in a new tab and then edit that sub-node and its children.

1. Right click on a sub-node you want to edit or delete

2. Select open link in a new tab

3. Edit the sub-node in the new tab

回答4:

I have the same problem... I'm a bit surprised because I though Firebase could easily scale to support huge amount of data (example million users, etc.).

I have a node with 80000 sub-nodes (each object has his own push-id) and I cannot delete or perform any action on it because the real-time doesn't work in Firebase console.

I think the only way to udate or delete the data it's to do it via JAVA code :(

回答5:

What you can do is to have an OnClickListener and call the remove value method to your DatabaseReference, like this:

  mCart.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            mDatabaseReference.removeValue();
        }
    });

回答6:

Multiple times trying to load the specific keys can be tiresome. There is a python library that could do this for you easily.

http://ozgur.github.io/python-firebase/

I needed to delete a lot of keys and this helped me do that in one go.