Model Field Value Change Event

[bergstyle]

Wondering how others are handling situations where you'd like to know if the value of a Model's field changes?

One solution is to override the Model's afterEdit method.

    afterEdit: function() {
        var me = this;
        Ext.Object.each(me.modified, function(key, oldValue, self) {
            if(oldValue) {    
                me.fireEvent(key+'modified', me, me.get(key), oldValue);
            }
        });
        this.callParent(arguments);
    } 

Here's another solution that leverages the store's 'update' event which is fired in the model's afterEdit method.

    listeners: {
        update: function(store, record, modelOperation) {
            if(modelOperation === 'edit') {
                Ext.Object.each(record.modified, function(key, oldValue, self) {
                    if(oldValue) {    
                        record.fireEvent(key+'modified', me, me.get(key), oldValue);
                    }
                });
            }
        }, 

With either approach I can setup listeners for fieldnamemodified events on the model. Its not bad but it seems Ext.data.Field should have an event like this.