This is my node structure:

I want to change email, name and roll. For this, I have used map in java and used setvalue(map). But the problem is node extra is being deleted here. This node is used by cloud function, so I don't want to download the data and set the data while saving again.

Because:

If the above step is completed before the below step, then I won't get the URL.
I don't want to touch the node extra and change other nodes at once. Is there any way to do so?

CodePudding user response：

How to update all values except one in Realtime Database?

Simply by using DatabaseReference#updateChildren(Map<String, Object> update) and passing a Map object that contains *only the fields you want to update. In this way, all the other fields will remain untouched.

DatabaseReference#setValue(Object value) will always overwrite the data at the specific location.