Computed needs to be hyperdb.Computed. Symbol not imported in anydbm like it is in rdbms.

Author: rouilj

roundup/backends/back_anydbm.py

@@ -1146,7 +1146,7 @@ def get(self, nodeid, propname, default=_marker, cache=1):
         # get the property (raises KeyErorr if invalid)
         prop = self.properties[propname]
 
-        if isinstance(prop, Computed):
+        if isinstance(prop, hyperdb.Computed):
             return prop.function(prop, nodeid, self.db)
 
         if isinstance(prop, hyperdb.Multilink) and prop.computed: