Update previous attributes even in silent mode

[fernandogmar]

It should be great to keep previous attributes updated even when set an attribute in silent mode

[jashkenas]

Nope -- the point of a "silent" change is that it isn't considered a change from the models point of view. Later, when the change actually occurs, you get the full difference all at once.

[javisantana]

@jashkenas you meant this behavior is ok?:

//using current master
test("test previous", 2, function() {
    var model = new Backbone.Model({name : "Tim", age : 10});
    model.set({name : 'Rob'}, {silent : true});
    equal(model.get('name'), 'Rob');
    model.on('change', function() {
      // equal(model.previous('name'), 'Rob'); <- fails 
      equal(model.previous('name'), 'Tim'); <- OK
    });
    model.set({name : 'Test'});
 });

[fernandogmar]

@javisantana I think so.

But I needed the opposite

test("test previous", 2, function() {
var model = new Backbone.Model({name : "Tim", age : 10});
model.set({name : 'Rob'}, {silent : true});
equal(model.get('name'), 'Rob');
model.on('change', function() {
// equal(model.previous('name'), 'Tim'); <- fails
equal(model.previous('name'), 'Rob'); <- Ok
});
model.set({name : 'Test'});
});

The reason: I need to change values without trigger change events... but at
the same time to keep previous values to unset or recover them. Anyway
thank you for the test :D

On Tue, Jul 17, 2012 at 6:02 PM, javi santana <
reply@reply.github.com

wrote:

@jashkenas you meant this behavior is ok?:

//using current master
test("test previous", 2, function() {
var model = new Backbone.Model({name : "Tim", age : 10});
model.set({name : 'Rob'}, {silent : true});
equal(model.get('name'), 'Rob');
model.on('change', function() {
// equal(model.previous('name'), 'Rob'); <- fails
equal(model.previous('name'), 'Tim'); <- OK
});
model.set({name : 'Test'});
});

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