QueryableAttribute can stringify itself without triggering a mapper compile. prevents confusion

when stringing the attr during an exception for something else like a bad event listen

2 files changed, 2 insertions, 2 deletions

diff --git a/lib/sqlalchemy/event.py b/lib/sqlalchemy/event.py
index 6c74c101d..66b7e2d1b 100644
--- a/lib/sqlalchemy/event.py
+++ b/lib/sqlalchemy/event.py
@@ -21,7 +21,7 @@ def listen(target, identifier, fn, *args, **kw):
         if tgt is not None:
             tgt.dispatch._listen(tgt, identifier, fn, *args, **kw)
             return
-    raise exc.InvalidRequestError("No such event %s for target %s" %
+    raise exc.InvalidRequestError("No such event '%s' for target '%s'" %
                                 (identifier,target))
 
 def remove(target, identifier, fn):
diff --git a/lib/sqlalchemy/orm/attributes.py b/lib/sqlalchemy/orm/attributes.py
index 6b57d33f5..eb923bc4e 100644
--- a/lib/sqlalchemy/orm/attributes.py
+++ b/lib/sqlalchemy/orm/attributes.py
@@ -113,7 +113,7 @@ class QueryableAttribute(interfaces.PropComparator):
             )
 
     def __str__(self):
-        return repr(self.parententity) + "." + self.property.key
+        return "%s.%s" % (self.class_.__name__, self.key)
 
     @util.memoized_property
     def property(self):