Missing attributes from server are not removed

[yamsellem]

Missing attributes from server are not removed in model:

const model = new Model();
model.save({name: 'Paul', age: 18});
// server replies {name: 'Paul'}
// model still has is age attributes equal to 18

// server replies {name: 'Paul', age: 20}
// model is correctly updated

[RickButler]

I think this is currently the expected behavior. If you do not pass { wait: true } in the options, your model will be set immediately before sync succeeds/returns.

[yamsellem]

Hi, I'm speaking about the model values in the success callback. Then, the values has already been taken from the server response. If an attribute has cease to exist, it should be deleted. If an attribute is modified by the server, it's correctly handled. Backbone handles both cases very well 😋.

[RickButler]

I haven't used backbone in a while, but I don't see the behavior you are describing.

Backbone Model Save Success Callback:
https://github.com/jashkenas/backbone/blob/master/backbone.js#L639

Ampersand Model Save Success Callback:
https://github.com/AmpersandJS/ampersand-model/blob/master/ampersand-model.js#L51