Firebase Real Time Database Validate Number Increment

user_16224163 0
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I'm using Firebase Real-Time Database as backend. I want it to increase by 1 max for each request For example:

    "Counter":{
       ".write":"true",
       ".read":"true,
       ".validate":"data.val()+1"
    }

This is not working.

On the frontend, I'm sending "data+1". How should i create ".validate" rules?

firebase-security firebase-realtime-database firebase
1 Answers

To validate that the new value is one higher than the existing value:

".validate":"newData.val() === data.val() + 1"

Also see the Firebase documentation on Existing Data vs. New Data.

user_2091030
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