Vary Class Behavior with noSuchMethod()
We first met noSuchMethod in Chapter 7, Classes and Objects. Let’s try to put it to use as a means for switching the behavior of the save method in the Hipster MVC library. We already have it saving to a REST-like back end. Let’s get it saving to either REST-like storage or localStorage.
Recall that when HipsterModel invokes save, it sends a JSON representation of its attributes to the REST-like data store and establishes handlers for successful updates.
| mvc_library/public/scripts/HipsterModel.dart | |
| | class HipsterModel { |
| | // ... |
| | save({callback}) { |
| | var req = new HttpRequest(); |
| | req.onLoad.listen((event) { |
| | attributes = JSON.decode(req.responseText); |
| | _onSave.add(this); |
| | if (callback ... |
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