- the value of a bindparam() can be a callable, in which

case it's evaluated at statement execution time to
get the value.
- expressions used in filter(), filter_by() and others,
when they make usage of a clause generated from a
relation using the identity of a child object
(e.g. filter(Parent.child==<somechild>)), evaluate
the actual primary key value of <somechild> at
execution time so that the autoflush step of the
Query can complete, thereby populating the PK value
of <somechild> in the case that <somechild> was
pending.
- cleanup of attributes.get_committed_value() to never return
the NO_VALUE value; evaluates to None

1 files changed, 11 insertions, 2 deletions

diff --git a/lib/sqlalchemy/sql/compiler.py b/lib/sqlalchemy/sql/compiler.py
index 8d8cfa38f..c5ff974e5 100644
--- a/lib/sqlalchemy/sql/compiler.py
+++ b/lib/sqlalchemy/sql/compiler.py
@@ -213,10 +213,19 @@ class DefaultCompiler(engine.Compiled):
                         pd[name] = params[paramname]
                         break
                 else:
-                    pd[name] = bindparam.value
+                    if callable(bindparam.value):
+                        pd[name] = bindparam.value()
+                    else:
+                        pd[name] = bindparam.value
             return pd
         else:
-            return dict([(self.bind_names[bindparam], bindparam.value) for bindparam in self.bind_names])
+            pd = {}
+            for bindparam in self.bind_names:
+                if callable(bindparam.value):
+                    pd[self.bind_names[bindparam]] = bindparam.value()
+                else:
+                    pd[self.bind_names[bindparam]] = bindparam.value
+            return pd
 
     params = property(construct_params)