UID is generated before onChange of ID

[Jason]

I have a grid where for newly created items I autoincrement the ID field like this:

// use this to handle auto-increment for new rows
var current = -1;
function onChange(e) {

    if (e.action == "add") {
        var item = e.items[0];

        item.ID = current;

        current -= 1;
    }
}

The problem I am having is when I call addRow() the UID is generated based on an ID of 0, and not the ID that I create in the onChange event. This causes problems when trying do a dataSource.get(ID)...

// ID = -1
var item = dataSource.get(ID);

// UID = undefined because the UID was generated thinking it was an ID of 0, not -1
var uid = item.uid;

Any hints? This is making other operations on my grid impossible.

[Nikolay Rusev]

Hello Jason,

Default value for number is `0` and that is what will be used when new model is instantiated, except if `defaultValue` for the field is defined.

You can find more details on model field definition here: Model definition.

Regards,
Nikolay Rusev
Telerik