+
+class compound(base):
+ def __init__(self, indextype, name, *parts):
+ super().__init__(parts[0].store, indextype, name, index.compound(*(part.typ for part in parts)))
+ self.parts = parts
+ self.iattr = "__idx_%s_cur" % name
+
+ def register(self, id, obj, tx):
+ val = tuple(part.__get__(obj, None) for part in self.parts)
+ self.index().put(val, id, tx=tx)
+ tx.postcommit(lambda: setattr(obj, self.iattr, val))
+
+ def unregister(self, id, obj, tx):
+ self.index().remove(getattr(obj, self.iattr), id, tx=tx)
+ tx.postcommit(lambda: delattr(obj, self.iattr))
+
+ def update(self, id, obj, tx):
+ val = tuple(part.__get__(obj, None) for part in self.parts)
+ ival = getattr(obj, self.iattr)
+ if val != ival:
+ idx = self.index()
+ idx.remove(ival, id, tx=tx)
+ idx.put(val, id, tx=tx)
+ tx.postcommit(lambda: setattr(obj, self.iattr, val))