From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Mon, 3 Feb 2014 00:05:36 +0000 (-0500)
Subject: - Added a tweak to the "history_meta" example where the check for
X-Git-Tag: rel_0_9_2~2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=b85f0b5681272dc0976bbb760fdbb243aa7ce5a4;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

- Added a tweak to the "history_meta" example where the check for
"history" on a relationship-bound attribute will now no longer emit
any SQL if the relationship is unloaded.
---

diff --git a/doc/build/changelog/changelog_09.rst b/doc/build/changelog/changelog_09.rst
index 992ace2ea2..a043d61c34 100644
--- a/doc/build/changelog/changelog_09.rst
+++ b/doc/build/changelog/changelog_09.rst
@@ -14,6 +14,13 @@
 .. changelog::
     :version: 0.9.2
 
+    .. change::
+        :tags: bug, examples
+
+        Added a tweak to the "history_meta" example where the check for
+        "history" on a relationship-bound attribute will now no longer emit
+        any SQL if the relationship is unloaded.
+
     .. change::
         :tags: feature, sql
 
diff --git a/examples/versioned_history/history_meta.py b/examples/versioned_history/history_meta.py
index 8cb5234343..04cb4e1aab 100644
--- a/examples/versioned_history/history_meta.py
+++ b/examples/versioned_history/history_meta.py
@@ -160,7 +160,8 @@ def create_version(obj, session, deleted = False):
         # check those too
         for prop in obj_mapper.iterate_properties:
             if isinstance(prop, RelationshipProperty) and \
-                attributes.get_history(obj, prop.key).has_changes():
+                attributes.get_history(obj, prop.key,
+                        passive=attributes.PASSIVE_NO_INITIALIZE).has_changes():
                 for p in prop.local_columns:
                     if p.foreign_keys:
                         obj_changed = True