The transactuon meta-data field, extended_info has been

renamed to ``extension``.

CHANGES.rst

@@ -9,6 +9,9 @@ Changes
   ASCII.  It was decided that this would lead to bugs that were hard
   to test for.
 
+  Also, the transactuon meta-data field, ``extended_info`` has been
+  renamed to ``extension``.
+
 2.0.2 (2016-11-13)
 ------------------
 

transaction/_transaction.py

@@ -101,9 +101,9 @@ def __init__(self, synchronizers=None, manager=None):
         # manager as a key, because we can't guess whether the actual
         # resource managers will be safe to use as dict keys.
 
-        # The user, description, and extended_info attributes are accessed
+        # The user, description, and extension attributes are accessed
         # directly by storages, leading underscore notwithstanding.
-        self.extended_info = {}
+        self.extension = {}
 
         self.log = _makeLogger()
         self.log.debug("new transaction")
@@ -123,11 +123,11 @@ def __init__(self, synchronizers=None, manager=None):
     def _extension(self):
         # for backward compatibility, since most clients used this
         # absent any formal API.
-        return self.extended_info
+        return self.extension
 
     @_extension.setter
     def _extension(self, v):
-        self.extended_info = v
+        self.extension = v
 
     @property
     def user(self):
@@ -554,7 +554,7 @@ def setUser(self, user_name, path=u"/"):
     def setExtendedInfo(self, name, value):
         """ See ITransaction.
         """
-        self.extended_info[name + u''] = value # + u'' to make sure it's unicode
+        self.extension[name] = value
 
 
 # TODO: We need a better name for the adapters.

transaction/interfaces.py

@@ -125,12 +125,8 @@ class ITransaction(Interface):
         raise an exception, or truncate the value).
         """)
 
-    extended_info = Attribute(
-        """A dictionary containing application-defined metadata.
-
-        Keys must be text (unicode).  Values must be simple values
-        serializable with json or pickle (not instances).
-        """)
+    extension = Attribute(
+        "A dictionary containing application-defined metadata.")
 
     def commit():
         """Finalize the transaction.

transaction/tests/test__transaction.py

@@ -76,8 +76,8 @@ def test_ctor_defaults(self):
         self.assertEqual(txn._resources, [])
         self.assertEqual(txn._adapters, {})
         self.assertEqual(txn._voted, {})
-        self.assertEqual(txn.extended_info, {})
-        self.assertTrue(txn._extension is txn.extended_info) # legacy
+        self.assertEqual(txn.extension, {})
+        self.assertTrue(txn._extension is txn.extension) # legacy
         self.assertTrue(txn.log is logger)
         self.assertEqual(len(logger._log), 1)
         self.assertEqual(logger._log[0][0], 'debug')
@@ -1019,7 +1019,7 @@ def test_user_bytes(self):
     def test_setExtendedInfo_single(self):
         txn = self._makeOne()
         txn.setExtendedInfo('frob', 'qux')
-        self.assertEqual(txn.extended_info, {u'frob': 'qux'})
+        self.assertEqual(txn.extension, {u'frob': 'qux'})
         self.assertTrue(txn._extension is txn._extension) # legacy
 
     def test_setExtendedInfo_multiple(self):
@@ -1035,7 +1035,7 @@ def test__extension_settable(self):
         txn = self._makeOne()
         txn._extension = dict(baz='spam')
         txn.setExtendedInfo('frob', 'qux')
-        self.assertEqual(txn.extended_info, {u'frob': 'qux', 'baz': 'spam'})
+        self.assertEqual(txn.extension, {u'frob': 'qux', 'baz': 'spam'})
 
     def test_data(self):
         txn = self._makeOne()