work around removal of deprecated SQLAlchemy APIs

diff --git a/debian/changelog b/debian/changelog
index f9a0efd..9776bf4 100644 (file)
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+invirt-database (0.2.8~glasgall7) precise; urgency=low
+
+  * Add compatibility hack to work around removal of deprecated APIs
+
+ -- Adam Glasgall <glasgall@mit.edu>  Thu, 21 Mar 2013 21:56:13 -0700
+
 invirt-database (0.2.8~glasgall6) precise; urgency=low
 
   * Remove reference to sqlalchemy.ext.assignmapper, which was removed

diff --git a/python/database/models.py b/python/database/models.py
index f3c1862..236598a 100644 (file)
--- a/python/database/models.py
+++ b/python/database/models.py
@@ -6,6 +6,22 @@ import datetime
 
 from invirt.database import record
 
+# Compatibility hack from
+# http://www.sqlalchemy.org/trac/wiki/UsageRecipes/SessionAwareMapper
+from sqlalchemy.orm import mapper as sqla_mapper
+
+def session_mapper(scoped_session):
+    def mapper(cls, *arg, **kw):
+        if cls.__init__ is object.__init__:
+            def __init__(self, **kwargs):
+                for key, value in kwargs.items():
+                    setattr(self, key, value)
+            cls.__init__ = __init__
+        cls.query = scoped_session.query_property()
+        return sqla_mapper(cls, *arg, **kw)
+    return mapper
+
+
 __all__ = ['meta',
            'session',
            'clear_cache',
@@ -151,23 +167,24 @@ class Build(record.Record):
     _identity_field = 'build_id'
 
 from invirt.database.owner import Owner
-
-session.mapper(Machine, machine_table,
-              properties={'nics': relation(NIC, backref="machine"),
-                          'disks': relation(Disk, backref="machine"),
-                          'type': relation(Type),
-                          'acl': relation(MachineAccess, backref="machine", passive_deletes=True, cascade="all, delete-orphan")});
-session.mapper(MachineAccess, machine_access_table)
-session.mapper(NIC, nic_table)
-session.mapper(Disk, disk_table)
-session.mapper(Type, types_table)
-session.mapper(Mirror, mirrors_table)
-session.mapper(CDROM, cdroms_table,
-               properties={'mirror': relation(Mirror, backref="cdroms")})
-session.mapper(Autoinstall, autoinstalls_table)
-session.mapper(Owner, owners_table)
-session.mapper(Admin, admins_table)
-session.mapper(Build, builds_table)
+mapper = session_mapper(session)
+
+mapper(Machine, machine_table,
+      properties={'nics': relation(NIC, backref="machine"),
+                  'disks': relation(Disk, backref="machine"),
+                  'type': relation(Type),
+                  'acl': relation(MachineAccess, backref="machine", passive_deletes=True, cascade="all, delete-orphan")});
+mapper(MachineAccess, machine_access_table)
+mapper(NIC, nic_table)
+mapper(Disk, disk_table)
+mapper(Type, types_table)
+mapper(Mirror, mirrors_table)
+mapper(CDROM, cdroms_table,
+       properties={'mirror': relation(Mirror, backref="cdroms")})
+mapper(Autoinstall, autoinstalls_table)
+mapper(Owner, owners_table)
+mapper(Admin, admins_table)
+mapper(Build, builds_table)
 
 def clear_cache():
     """Clear sqlalchemy's cache