mark d wrote: Instead

e.data.myField = "constantPrefix" + e.data.myField;

use

var value = "constantPrefix" + e.get('myField');
e.set('myField', value);

model.set() is responsible to trigger necessary events, which the dataview does catch.

@mark e,

again this is irrelevant. The question was asking where in the MVC to manipulate the entered data, not how to do it client-side with JS.

Gez