- [bug] TypeDecorator now includes a generic repr()

    that works in terms of the "impl" type by default.
    This is a behavioral change for those TypeDecorator
    classes that specify a custom __init__ method; those
    types will need to re-define __repr__() if they need
    __repr__() to provide a faithful constructor representation.
    [ticket:2594]

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/sqlalchemy/util/langhelpers.py b/lib/sqlalchemy/util/langhelpers.py
index 9761aeae9..55b78090a 100644
--- a/lib/sqlalchemy/util/langhelpers.py
+++ b/lib/sqlalchemy/util/langhelpers.py
@@ -281,14 +281,16 @@ def unbound_method_to_callable(func_or_cls):
     else:
         return func_or_cls
 
-def generic_repr(obj, additional_kw=()):
+def generic_repr(obj, additional_kw=(), to_inspect=None):
     """Produce a __repr__() based on direct association of the __init__()
     specification vs. same-named attributes present.
 
     """
+    if to_inspect is None:
+        to_inspect = obj
     def genargs():
         try:
-            (args, vargs, vkw, defaults) = inspect.getargspec(obj.__init__)
+            (args, vargs, vkw, defaults) = inspect.getargspec(to_inspect.__init__)
         except TypeError:
             return