Almost every object thus far has done this:
changes = {}
for key in self.obj_what_changed():
changes[key] = self[key]
to get a dict of updates to apply to the database. This patch adds
that as part of the base object and makes every place that does
the above to just use that.
Change-Id: I847f5d35181b0305668b107f86faa164e71c3375
Each object with a list duplicated the _make_list() method in its
own module. This removes that duplication and adds a generalized
helper in objects/base.py. The instance object still uses its own
because it has to do a bunch of other stuff in the loop for
efficiency.
Change-Id: Ic910f39087ebc167b2b930979f7951116caf8598
Creates a new DBObjectMixin class for DB-backed objects to use. This
allows us to create non-DB-backed objects without having the common DB
fields automagically added to them.
Related to blueprint unified-object-model
Change-Id: Iaf2d8500505e9acdbffffb1d4bd3db0870ae82a3
