Comment 1 for bug 1848216

So the prefix problem is interesting, because we have to be able to access them in templates from a single adapter. The prefix needs to be optional. Thus, my idea is, that we want to access (in a template) a no-prefix item as:

    adapter.password

But, it would be cool to access a prefixed item with:

    adapter.prefix.nova_cell0.password

How could we do this?

There's a couple of ways. We could just return a dictionary of dictionaries from a prefix property, and let Jinga2 do it's automatic attribute/key __getitem__() magic to do the lookups, but that's fairly nasty from other code.

The 2nd way would be to return an object from a prefix property that has a __getattribute__ method hack to accept the prefix and then provide a object that has the autoaccessor properties on it locked to the prefix. i.e. take the autoaccessor properties off of the adapter.

Obviously, the former is easier, but less satisfying; the latter requires a little more work in the DatabaseRelationAdapter class to provide a nice ergonomic API