+Rating.reverse_options = dict (zip(Rating.options.values(), Rating.options.keys()))
+
+
+
+class UserRelation(Entity):
+ user = ManyToOne("User")
+ art = ManyToOne("Art")
+ kind = Field(String) # by for of
+ creator = ManyToOne("User")
+ confirmed_by_related_user = Field(Boolean)
+
+ # it is useful to record which authority figure on a given artwork
+ # confirmed the validity of this relation.
+ confirmed_by_authority = ManyToOne("User")
+
+ def __init__(self, **kwargs):
+ super(UserRelation, self).__init__(**kwargs)
+ assert self.user and self.art and self.kind and self.creator
+
+ if self.creator == self.user:
+ self.confirmed_by_related_user = True
+ # TODO: implement authorities
+ # if self.creator in self.art.authorities
+ # self.confirmed_by_authority = self.creator
+
+ def __unicode__(self):
+ return "%s: %s" % (self.kind, self.related_user)