- [feature] *Very limited* support for

    inheriting mappers to be GC'ed when the
    class itself is deferenced.  The mapper
    must not have its own table (i.e.
    single table inh only) without polymorphic
    attributes in place.
    This allows for the use case of
    creating a temporary subclass of a declarative
    mapped class, with no table or mapping
    directives of its own, to be garbage collected
    when dereferenced by a unit test.
    [ticket:2526]

1 files changed, 16 insertions, 16 deletions

diff --git a/test/perf/orm2010.py b/test/perf/orm2010.py
index 23bad9c69..ed4e7b090 100644
--- a/test/perf/orm2010.py
+++ b/test/perf/orm2010.py
@@ -51,36 +51,36 @@ class Grunt(Employee):
 
     employer_id = Column(Integer, ForeignKey('boss.id'))
 
-    # Configure an 'employer' relationship, where Grunt references 
-    # Boss.  This is a joined-table subclass to subclass relationship, 
+    # Configure an 'employer' relationship, where Grunt references
+    # Boss.  This is a joined-table subclass to subclass relationship,
     # which is a less typical case.
 
     # In 0.7, "Boss.id" is the "id" column of "boss", as would be expected.
     if __version__ >= "0.7":
-        employer = relationship("Boss", backref="employees", 
+        employer = relationship("Boss", backref="employees",
                                     primaryjoin=Boss.id==employer_id)
 
     # Prior to 0.7, "Boss.id" is the "id" column of "employee".
     # Long story.  So we hardwire the relationship against the "id"
     # column of Boss' table.
     elif __version__ >= "0.6":
-        employer = relationship("Boss", backref="employees", 
+        employer = relationship("Boss", backref="employees",
                                 primaryjoin=Boss.__table__.c.id==employer_id)
 
-    # In 0.5, the many-to-one loader wouldn't recognize the above as a 
+    # In 0.5, the many-to-one loader wouldn't recognize the above as a
     # simple "identity map" fetch.  So to give 0.5 a chance to emit
     # the same amount of SQL as 0.6, we hardwire the relationship against
     # "employee.id" to work around the bug.
     else:
-        employer = relationship("Boss", backref="employees", 
-                                primaryjoin=Employee.__table__.c.id==employer_id, 
+        employer = relationship("Boss", backref="employees",
+                                primaryjoin=Employee.__table__.c.id==employer_id,
                                 foreign_keys=employer_id)
 
     __mapper_args__ = {'polymorphic_identity':'grunt'}
 
 if os.path.exists('orm2010.db'):
     os.remove('orm2010.db')
-# use a file based database so that cursor.execute() has some 
+# use a file based database so that cursor.execute() has some
 # palpable overhead.
 engine = create_engine('sqlite:///orm2010.db')
 
@@ -92,7 +92,7 @@ def runit():
     # create 1000 Boss objects.
     bosses = [
         Boss(
-            name="Boss %d" % i, 
+            name="Boss %d" % i,
             golf_average=Decimal(random.randint(40, 150))
         )
         for i in xrange(1000)
@@ -111,9 +111,9 @@ def runit():
     ]
 
     # Assign each Grunt a Boss.  Look them up in the DB
-    # to simulate a little bit of two-way activity with the 
+    # to simulate a little bit of two-way activity with the
     # DB while we populate.  Autoflush occurs on each query.
-    # In 0.7 executemany() is used for all the "boss" and "grunt" 
+    # In 0.7 executemany() is used for all the "boss" and "grunt"
     # tables since priamry key fetching is not needed.
     while grunts:
         boss = sess.query(Boss).\
@@ -131,13 +131,13 @@ def runit():
     # load all the Grunts, print a report with their name, stats,
     # and their bosses' stats.
     for grunt in sess.query(Grunt):
-        # here, the overhead of a many-to-one fetch of 
-        # "grunt.employer" directly from the identity map 
+        # here, the overhead of a many-to-one fetch of
+        # "grunt.employer" directly from the identity map
         # is less than half of that of 0.6.
         report.append((
-                        grunt.name, 
-                        grunt.savings, 
-                        grunt.employer.name, 
+                        grunt.name,
+                        grunt.savings,
+                        grunt.employer.name,
                         grunt.employer.golf_average
                     ))