def __delitem__(self, key):
todelete = self[key]
if hasattr(self, '_todelete'):
self._todelete.append(todelete)
else:
self._todelete = [todelete]
AdapterNode.__delitem__(self, key)
def __getitem__(self, key):
try:
return AdapterNode.__getitem__(self, key)
except KeyError:
if not key in self.iterkeys():
raise KeyError(key)
revision = RevisionAdapter(self.model[key], key, self)
self[key] = revision
return revision
def __getitem__(self, key):
try:
return AdapterNode.__getitem__(self, key)
except KeyError:
if not key in self.iterkeys():
raise KeyError(key)
media = MediaAdapter(self.model[key], key, self)
self[key] = media
return media
def test_AdapterNode(self):
toadapt = BaseNode()
toadapt['foo'] = BaseNode()
toadapt['bar'] = BaseNode()
toadapt.attrs.title = 'Some title'
toadapt.attrs.description = 'Some description'
# Adapt created node structure
adapter = AdapterNode(toadapt, 'name', None)
# Check ``AdapterNode``
expected = "<BaseNode object 'foo' at"
self.assertTrue(str(adapter.model['foo']).startswith(expected))
# ``attrs``
self.assertEqual(adapter.attrs.title, 'Some title')
# The adapter node is responsible to return other adapter node or
# application nodes on ``__getitem__`` if application hierarchy
# continues. It's possible to do key aliasing as well at this place.
# This dummy class does a static mapping on ``__getitem__``.
class TestAdapterNode(AdapterNode):
def __getitem__(self, key):
return AdapterNode(self.model['bar'], key, self)
node = TestAdapterNode(toadapt, 'adapter', None)
child = node['aliased']
expected = "<AdapterNode object 'aliased' at"
self.assertTrue(str(child).startswith(expected))
self.assertTrue(child.model is toadapt['bar'])
self.assertEqual([key for key in node], ['foo', 'bar'])
# The application node path differs from the adapted node path. This is
# essential to keep the application path sane while not violating the
# adapted node's structure
self.assertEqual(child.path, ['adapter', 'aliased'])
self.assertEqual(child.model.path, [None, 'bar'])
def __getitem__(self, key):
return AdapterNode(self.model['bar'], key, self)