+ properties = dict(maintainer_id = self.tbl_maintainer.c.id,
+ maintains_sources = relation(DBSource, backref='maintainer',
+ primaryjoin=(self.tbl_maintainer.c.id==self.tbl_source.c.maintainer)),
+ changed_sources = relation(DBSource, backref='changedby',
+ primaryjoin=(self.tbl_maintainer.c.id==self.tbl_source.c.changedby))))