Adding fields to existing database

[Walid Al-Turk]

Hello all, 

I am new to Firebase and wonder if there is a way to add a field or fields to an existing database. Lets say I have a database with "chat" child. the chat child has two fields username and message. after adding several records I want to add a field "messagedate" to all objects in the chat database child. How can I do this?

Thanks 

[Frank van Puffelen]

Hi Walid,

Something like this would do the trick:

    var ref = new Firebase('https://yours.firebaseio.com/chat');

    ref.on('child_added', function(snapshot) {

        snapshot.ref().update({ messagedate: Date.now() });

    });

[Kato Richardson]

An additional note that may be of use: Puf's example would be equivalent to this set, when working with a single child key:

snapshot.ref().child('messagedate').set( Firebase.ServerValue.TIMESTAMP );

Where the update() would be more useful for working with multiple child keys. Hopefully that helps to outline the difference between set/update and where both may be useful.

Also I'd prefer Firebase.ServerValue.TIMESTAMP for most date-related ops.

☃, Kato

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