Django model fields getter / setter

You can also override setattr and getattr. For example, say you wanted to mark a field dirty, you might have something like this:

class MyModel:
    _name_dirty = False

    name = models.TextField()

    def __setattr__(self, attrname, val):
        super(MyModel, self).__setattr__(attrname, val)

        self._name_dirty = (attrname == 'name')


    def __getattr__(self, attrname):
        if attrname == 'name' and self._name_dirty:
            raise('You should get a clean copy or save this object.')

        return super(MyModel, self).__getattr__(attrname)