Remove upgrade and restrict providers other than postgres

pony/orm/core.py

@@ -78,6 +78,8 @@
 
 suppress_debug_change = False
 
+supported_providers = ('postgres',)
+
 def sql_debug(value):
     # todo: make sql_debug deprecated
     if not suppress_debug_change:
@@ -795,6 +797,12 @@ def _bind(self, *args, **kwargs):
         if args: provider, args = args[0], args[1:]
         elif 'provider' not in kwargs: throw(TypeError, 'Database provider is not specified')
         else: provider = kwargs.pop('provider')
+        if provider not in supported_providers:
+            throw(
+                MappingError,
+                'This version of Pony is experimental and does not support provider %s. Supported providers are: %s' %
+                (provider, ', '.join(supported_providers))
+            )
         if isinstance(provider, type) and issubclass(provider, DBAPIProvider):
             provider_cls = provider
         else:

pony/orm/migrations/cli.py

@@ -36,9 +36,9 @@
 
 squash_parser = subparsers.add_parser('squash', help='squash all migrations into the new one')
 
-upgrade_parser = subparsers.add_parser('upgrade', help='upgrade database to current Pony version')
-upgrade_parser.add_argument('--sql-only', action='store_true', help='only show sql of upgrade process')
-upgrade_parser.add_argument('-v', '--verbose', action='store_true', help='show sql of upgrade process')
+#upgrade_parser = subparsers.add_parser('upgrade', help='upgrade database to current Pony version')
+#upgrade_parser.add_argument('--sql-only', action='store_true', help='only show sql of upgrade process')
+#upgrade_parser.add_argument('-v', '--verbose', action='store_true', help='show sql of upgrade process')
 
 downgrade_parser = subparsers.add_parser('downgrade', help='downgrade database to Pony version 0.7.11')
 downgrade_parser.add_argument('--sql-only', action='store_true', help='only show sql of downgrade process')
@@ -66,8 +66,8 @@ def migrate(db, cmd=None):
         m_list(db, graph, args)
     elif cmd == 'squash':
         squash(db, graph, args)
-    elif cmd == 'upgrade':
-        upgrade(db, args)
+    #elif cmd == 'upgrade':
+    #    upgrade(db, args)
     elif cmd == 'downgrade':
         downgrade(db, args)
     # elif cmd == 'apply':
@@ -364,6 +364,7 @@ def squash(db, graph, args):
 
 
 def upgrade(db, args):
+    raise NotImplementedError
     from pony.orm import db_session, commit
     vdb = db.vdb
     schema = vdb.schema