Hi Jeroen, > === added file 'lib/lp/services/database/collection.py' > --- lib/lp/services/database/collection.py 1970-01-01 00:00:00 +0000 > +++ lib/lp/services/database/collection.py 2010-07-15 15:00:52 +0000 > @@ -0,0 +1,125 @@ > +# Copyright 2010 Canonical Ltd. This software is licensed under the > +# GNU Affero General Public License version 3 (see the file LICENSE). > + > +"""A generic collection of database objects.""" > + > +__metaclass__ = type > +__all__ = [ > + 'Collection', > + ] > + > +from zope.component import getUtility > + > +from storm.expr import Join, LeftJoin > + > +from canonical.launchpad.webapp.interfaces import ( > + DEFAULT_FLAVOR, IStoreSelector, MAIN_STORE) > + > + > +class Collection(object): > + """An arbitrary collection of database objects. > + > + Works as a Storm wrapper: create a collection based on another > + collection, adding joins and select conditions to taste. > + > + As in any Storm query, you can select any mix of classes and > + individual columns or other Storm expressions. > + """ >
This looks very cool, but how does it relate with the BranchCollection implementation that already implements such a pattern? -- Francis J. Lacoste [email protected]
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