cyclades: Common function to get object by ID

Create common helper function, for command line tools, to get an object
from DB by it's ID, and raise the appropriate command error if the
object does not exist or the ID is invalid.

snf-cyclades-app/synnefo/db/models.py

@@ -384,7 +384,7 @@ class VirtualMachine(models.Model):
         return u"<vm:%s@backend:%s>" % (self.id, self.backend_id)
 
     # Error classes
-    class InvalidBackendIdError(Exception):
+    class InvalidBackendIdError(ValueError):
         def __init__(self, value):
             self.value = value
 
@@ -587,7 +587,7 @@ class Network(models.Model):
             free += ip_pool.count_available()
         return total, free
 
-    class InvalidBackendIdError(Exception):
+    class InvalidBackendIdError(ValueError):
         def __init__(self, value):
             self.value = value
 

snf-cyclades-app/synnefo/logic/management/commands/backend-modify.py

-# Copyright 2012 GRNET S.A. All rights reserved.
+# Copyright 2012-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -35,7 +35,7 @@ from optparse import make_option
 from django.core.management.base import BaseCommand, CommandError
 from synnefo.db.models import Backend
 from snf_django.management.utils import parse_bool
-from synnefo.management.common import (get_backend, check_backend_credentials)
+from synnefo.management import common
 
 HYPERVISORS = [h[0] for h in Backend.HYPERVISORS]
 
@@ -82,7 +82,7 @@ class Command(BaseCommand):
         if len(args) != 1:
             raise CommandError("Please provide a backend ID")
 
-        backend = get_backend(args[0])
+        backend = common.get_resource("backend", args[0], for_update=True)
 
         # Ensure fields correspondence with options and Backend model
         credentials_changed = False
@@ -95,8 +95,10 @@ class Command(BaseCommand):
 
         if credentials_changed:
                 # check credentials, if any of them changed!
-                check_backend_credentials(backend.clustername, backend.port,
-                                          backend.username, backend.password)
+                common.check_backend_credentials(backend.clustername,
+                                                 backend.port,
+                                                 backend.username,
+                                                 backend.password)
         if options['drained']:
             backend.drained = parse_bool(options['drained'], strict=True)
         if options['offline']:

snf-cyclades-app/synnefo/logic/management/commands/backend-remove.py

-# Copyright 2011-2012 GRNET S.A. All rights reserved.
+# Copyright 2011-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
@@ -29,7 +29,7 @@
 #
 
 from django.core.management.base import BaseCommand, CommandError
-from synnefo.management.common import get_backend
+from synnefo.management import common
 from synnefo.logic import backend as backend_mod
 from synnefo.db.models import Backend
 from django.db import transaction, models
@@ -50,7 +50,7 @@ class Command(BaseCommand):
         if len(args) < 1:
             raise CommandError("Please provide a backend ID")
 
-        backend = get_backend(args[0])
+        backend = common.get_resource("backend", args[0], for_update=True)
 
         write("Trying to remove backend: %s\n" % backend.clustername)
 

snf-cyclades-app/synnefo/logic/management/commands/flavor-modify.py

-# Copyright 2012 GRNET S.A. All rights reserved.
+# Copyright 2012-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -34,7 +34,7 @@
 from optparse import make_option
 
 from django.core.management.base import BaseCommand, CommandError
-from synnefo.management.common import get_flavor
+from synnefo.management.common import get_resource
 from snf_django.management.utils import parse_bool
 
 
@@ -67,7 +67,7 @@ class Command(BaseCommand):
         if len(args) != 1:
             raise CommandError("Please provide a flavor ID")
 
-        flavor = get_flavor(args[0], for_update=True)
+        flavor = get_resource("flavor", args[0], for_update=True)
 
         deleted = options['deleted']
 

snf-cyclades-app/synnefo/logic/management/commands/floating-ip-attach.py

-# Copyright 2012 GRNET S.A. All rights reserved.
+# Copyright 2012-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -61,9 +61,9 @@ class Command(BaseCommand):
             raise CommandError('Please give either a server or a router id')
 
         #get the vm
-        vm = common.get_vm(device, for_update=True)
-        floating_ip = common.get_floating_ip_by_id(floating_ip_id,
-                                                   for_update=True)
+        vm = common.get_resource("server", device, for_update=True)
+        floating_ip = common.get_resource("floating-ip", floating_ip_id,
+                                          for_update=True)
         servers.create_port(vm.userid, floating_ip.network,
                             use_ipaddress=floating_ip, machine=vm)
 

snf-cyclades-app/synnefo/logic/management/commands/floating-ip-create.py

-# Copyright 2012 GRNET S.A. All rights reserved.
+# Copyright 2012-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -71,8 +71,9 @@ class Command(BaseCommand):
             raise CommandError("'owner' is required for floating IP creation")
 
         if network_id is not None:
-            network = util.get_network(network_id, owner, for_update=True,
-                                       non_deleted=True)
+            network = util.get_resource("network", network_id, for_update=True)
+            if network.deleted:
+                raise CommandError("Network '%s' is deleted" % network.id)
             if not network.floating_ip_pool:
                 raise CommandError("Network '%s' is not a floating IP pool."
                                    % network)

snf-cyclades-app/synnefo/logic/management/commands/floating-ip-detach.py

-# Copyright 2012 GRNET S.A. All rights reserved.
+# Copyright 2012-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -49,8 +49,8 @@ class Command(BaseCommand):
         floating_ip_id = args[0]
 
         #get the floating-ip
-        floating_ip = common.get_floating_ip_by_id(floating_ip_id,
-                                                   for_update=True)
+        floating_ip = common.get_resource("floating-ip", floating_ip_id,
+                                          for_update=True)
 
         if not floating_ip.nic:
             raise CommandError('This floating IP is not attached to a device')

snf-cyclades-app/synnefo/logic/management/commands/floating-ip-remove.py

-# Copyright 2013 GRNET S.A. All rights reserved.
+# Copyright 2013-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -57,8 +57,9 @@ class Command(RemoveCommand):
         for floating_ip_id in args:
             self.stdout.write("\n")
             try:
-                floating_ip = common.get_floating_ip_by_id(floating_ip_id,
-                                                           for_update=True)
+                floating_ip = common.get_resource("floating-ip",
+                                                  floating_ip_id,
+                                                  for_update=True)
                 ips.delete_floating_ip(floating_ip)
                 self.stdout.write("Deleted floating IP '%s'.\n" %
                                   floating_ip_id)

snf-cyclades-app/synnefo/logic/management/commands/network-inspect.py

-# Copyright 2012-2013 GRNET S.A. All rights reserved.
+# Copyright 2012-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -54,7 +54,7 @@ class Command(BaseCommand):
         if len(args) != 1:
             raise CommandError("Please provide a network ID.")
 
-        network = common.get_network(args[0])
+        network = common.get_resource("network", args[0])
         displayname = options['displayname']
 
         pprint.pprint_network(network, display_mails=displayname,

snf-cyclades-app/synnefo/logic/management/commands/network-modify.py

-# Copyright 2012-2013 GRNET S.A. All rights reserved.
+# Copyright 2012-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -36,7 +36,7 @@ from optparse import make_option
 from django.core.management.base import BaseCommand, CommandError
 
 from synnefo.db.models import Backend
-from synnefo.management.common import (get_network, get_backend)
+from synnefo.management.common import get_resource
 from snf_django.management.utils import parse_bool
 from synnefo.logic import networks, backend as backend_mod
 from django.db import transaction
@@ -95,7 +95,7 @@ class Command(BaseCommand):
         if len(args) != 1:
             raise CommandError("Please provide a network ID")
 
-        network = get_network(args[0])
+        network = get_resource("network", args[0])
 
         new_name = options.get("name")
         if new_name is not None:
@@ -159,7 +159,7 @@ class Command(BaseCommand):
 
         add_to_backend = options["add_to_backend"]
         if add_to_backend is not None:
-            backend = get_backend(add_to_backend)
+            backend = get_resource("backend", add_to_backend)
             bnet, jobs = backend_mod.ensure_network_is_active(backend,
                                                               network.id)
             if jobs:
@@ -168,7 +168,7 @@ class Command(BaseCommand):
 
         remove_from_backend = options["remove_from_backend"]
         if remove_from_backend is not None:
-            backend = get_backend(remove_from_backend)
+            backend = get_resource("backend", remove_from_backend)
             if network.nics.filter(machine__backend=backend,
                                    machine__deleted=False).exists():
                 msg = "Cannot remove. There are still connected VMs to this"\

snf-cyclades-app/synnefo/logic/management/commands/network-remove.py

-# Copyright 2011-2013 GRNET S.A. All rights reserved.
+# Copyright 2011-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
@@ -32,7 +32,7 @@ from django.core.management.base import CommandError
 from snf_django.management.commands import RemoveCommand
 from snf_django.lib.api import faults
 from synnefo.logic import networks
-from synnefo.management.common import get_network, convert_api_faults
+from synnefo.management import common
 
 
 class Command(RemoveCommand):
@@ -40,7 +40,7 @@ class Command(RemoveCommand):
     args = "<Network ID> [<Network ID> ...]"
     help = "Remove a network from the Database, and Ganeti"
 
-    @convert_api_faults
+    @common.convert_api_faults
     def handle(self, *args, **options):
         if not args:
             raise CommandError("Please provide a network ID")
@@ -52,7 +52,8 @@ class Command(RemoveCommand):
         for network_id in args:
             self.stdout.write("\n")
             try:
-                network = get_network(network_id, for_update=True)
+                network = common.get_resource("network", network_id,
+                                              for_update=True)
                 self.stdout.write('Removing network: %s\n' %
                                   network.backend_id)
 

snf-cyclades-app/synnefo/logic/management/commands/port-create.py

-# Copyright 2013 GRNET S.A. All rights reserved.
+# Copyright 2013-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -127,12 +127,12 @@ class Command(BaseCommand):
         owner = None
         if server_id:
             owner = "vm"
-            vm = common.get_vm(server_id, for_update=True)
+            vm = common.get_resource("server", server_id, for_update=True)
             #if vm.router:
             #    raise CommandError("Server '%s' does not exist." % server_id)
         elif router_id:
             owner = "router"
-            vm = common.get_vm(router_id, for_update=True)
+            vm = common.get_resource("server", router_id, for_update=True)
             if not vm.router:
                 raise CommandError("Router '%s' does not exist." % router_id)
 
@@ -143,21 +143,20 @@ class Command(BaseCommand):
                 raise CommandError("Please specify the owner of the port.")
 
         # get the network
-        network = common.get_network(network_id)
+        network = common.get_resource("network", network_id)
 
         # Get either floating IP or fixed ip address
         ipaddress = None
         floating_ip_id = options["floating_ip_id"]
         ipv4_address = options["ipv4_address"]
         if floating_ip_id:
-            ipaddress = common.get_floating_ip_by_id(floating_ip_id,
-                                                     for_update=True)
+            ipaddress = common.get_resource("floating-ip", floating_ip_id,
+                                            for_update=True)
             if ipv4_address is not None and ipaddress.address != ipv4_address:
                 raise CommandError("Floating IP address '%s' is different from"
                                    " specified address '%s'" %
                                    (ipaddress.address, ipv4_address))
 
-
         # validate security groups
         sg_list = []
         if security_group_ids:

snf-cyclades-app/synnefo/logic/management/commands/port-inspect.py

-# Copyright 2013 GRNET S.A. All rights reserved.
+# Copyright 2013-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -62,7 +62,7 @@ class Command(BaseCommand):
         if len(args) != 1:
             raise CommandError("Please provide a port ID")
 
-        port = common.get_port(args[0])
+        port = common.get_resource("port", args[0])
 
         pprint.pprint_port(port, stdout=self.stdout)
         self.stdout.write('\n\n')

snf-cyclades-app/synnefo/logic/management/commands/port-remove.py

-# Copyright 2011-2013 GRNET S.A. All rights reserved.
+# Copyright 2011-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
@@ -62,7 +62,7 @@ class Command(RemoveCommand):
         for port_id in args:
             self.stdout.write("\n")
             try:
-                port = common.get_port(port_id, for_update=True)
+                port = common.get_resource("port", port_id, for_update=True)
 
                 servers.delete_port(port)
 

snf-cyclades-app/synnefo/logic/management/commands/reconcile-servers.py

-# Copyright 2011-2013 GRNET S.A. All rights reserved.
+# Copyright 2011-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
@@ -39,7 +39,7 @@ import logging
 import subprocess
 from optparse import make_option
 from django.core.management.base import BaseCommand
-from synnefo.management.common import get_backend
+from synnefo.management.common import get_resource
 from synnefo.logic import reconciliation
 from snf_django.management.utils import parse_bool
 
@@ -87,7 +87,7 @@ class Command(BaseCommand):
     def handle(self, **options):
         backend_id = options['backend-id']
         if backend_id:
-            backends = [get_backend(backend_id)]
+            backends = [get_resource("backend", backend_id)]
         else:
             backends = reconciliation.get_online_backends()
 

snf-cyclades-app/synnefo/logic/management/commands/server-create.py

-# Copyright 2012 GRNET S.A. All rights reserved.
+# Copyright 2012-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -108,10 +108,10 @@ class Command(BaseCommand):
         if not image_id:
             raise CommandError("image-id is mandatory")
 
-        flavor = common.get_flavor(flavor_id)
+        flavor = common.get_resource("flavor", flavor_id)
         image = common.get_image(image_id, user_id)
         if backend_id:
-            backend = common.get_backend(backend_id)
+            backend = common.get_resource("backend", backend_id)
         else:
             backend = None
 
@@ -147,7 +147,8 @@ def parse_connections(con_list):
                     val = {"port": port_id}
                 elif con_kind == "floatingip":
                     fip_id = opt.split(":")[1]
-                    fip = common.get_floating_ip_by_id(fip_id, for_update=True)
+                    fip = common.get_resource("floating-ip", fip_id,
+                                              for_update=True)
                     val = {"uuid": fip.network_id, "fixed_ip": fip.address}
                 else:
                     raise CommandError("Unknown argument for option --port")

snf-cyclades-app/synnefo/logic/management/commands/server-import.py

@@ -129,8 +129,8 @@ class Command(BaseCommand):
 
 def import_server(instance_name, backend_id, flavor_id, image_id, user_id,
                   new_public_nic, stream=sys.stdout):
-    flavor = common.get_flavor(flavor_id)
-    backend = common.get_backend(backend_id)
+    flavor = common.get_resource("flavor", flavor_id)
+    backend = common.get_resource("backend", backend_id)
 
     backend_client = backend.get_client()
 

snf-cyclades-app/synnefo/logic/management/commands/server-inspect.py

-# Copyright 2012-2013 GRNET S.A. All rights reserved.
+# Copyright 2012-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -61,7 +61,7 @@ class Command(BaseCommand):
         if len(args) != 1:
             raise CommandError("Please provide a server ID")
 
-        vm = common.get_vm(args[0], for_update=True)
+        vm = common.get_resource("server", args[0], for_update=True)
 
         displayname = options['displayname']
 

snf-cyclades-app/synnefo/logic/management/commands/server-list.py

-# Copyright 2012-2013 GRNET S.A. All rights reserved.
+# Copyright 2012-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -36,7 +36,7 @@ from functools import partial
 
 from snf_django.management.commands import ListCommand
 from synnefo.db.models import VirtualMachine
-from synnefo.management.common import get_backend
+from synnefo.management.common import get_resource
 from synnefo.api.util import get_image
 from synnefo.settings import (CYCLADES_SERVICE_TOKEN as ASTAKOS_TOKEN,
                               ASTAKOS_AUTH_URL)
@@ -120,7 +120,7 @@ class Command(ListCommand):
             self.filters["suspended"] = True
 
         if options["backend_id"]:
-            backend = get_backend(options["backend_id"])
+            backend = get_resource("backend", options["backend_id"])
             self.filters["backend"] = backend.id
 
         if options["build"]:

snf-cyclades-app/synnefo/logic/management/commands/server-modify.py

-# Copyright 2013 GRNET S.A. All rights reserved.
+# Copyright 2013-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -35,7 +35,7 @@ from optparse import make_option
 
 from django.db import transaction
 from django.core.management.base import BaseCommand, CommandError
-from synnefo.management.common import (get_vm, get_flavor, convert_api_faults,
+from synnefo.management.common import (get_resource, convert_api_faults,
                                        wait_server_task)
 from snf_django.management.utils import parse_bool
 from synnefo.logic import servers
@@ -93,7 +93,7 @@ class Command(BaseCommand):
         if len(args) != 1:
             raise CommandError("Please provide a server ID")
 
-        server = get_vm(args[0], for_update=True)
+        server = get_resource("server", args[0], for_update=True)
 
         new_name = options.get("name", None)
         if new_name is not None:
@@ -123,7 +123,7 @@ class Command(BaseCommand):
         wait = parse_bool(options["wait"])
         new_flavor_id = options.get("flavor")
         if new_flavor_id is not None:
-            new_flavor = get_flavor(new_flavor_id)
+            new_flavor = get_resource("flavor", new_flavor_id)
             old_flavor = server.flavor
             msg = "Resizing server '%s' from flavor '%s' to '%s'.\n"
             self.stdout.write(msg % (server, old_flavor, new_flavor))

snf-cyclades-app/synnefo/logic/management/commands/server-remove.py

-# Copyright 2013 GRNET S.A. All rights reserved.
+# Copyright 2013-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -34,7 +34,7 @@
 from optparse import make_option
 
 from django.core.management.base import CommandError
-from synnefo.management.common import (get_vm, convert_api_faults,
+from synnefo.management.common import (get_resource, convert_api_faults,
                                        wait_server_task)
 from synnefo.logic import servers
 from snf_django.management.commands import RemoveCommand
@@ -68,7 +68,7 @@ class Command(RemoveCommand):
         for server_id in args:
             self.stdout.write("\n")
             try:
-                server = get_vm(server_id)
+                server = get_resource("server", server_id, for_update=True)
 
                 self.stdout.write("Trying to remove server '%s' from backend "
                                   "'%s' \n" % (server.backend_vm_id,

snf-cyclades-app/synnefo/logic/management/commands/server-show.py

-# Copyright 2012 GRNET S.A. All rights reserved.
+# Copyright 2012-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -33,7 +33,7 @@
 
 from django.core.management.base import CommandError
 from snf_django.management.commands import SynnefoCommand
-from synnefo.management.common import (format_vm_state, get_vm,
+from synnefo.management.common import (format_vm_state, get_resource,
                                        get_image)
 from snf_django.lib.astakos import UserCache
 from synnefo.settings import (CYCLADES_SERVICE_TOKEN as ASTAKOS_TOKEN,
@@ -49,7 +49,7 @@ class Command(SynnefoCommand):
         if len(args) != 1:
             raise CommandError("Please provide a server ID")
 
-        server = get_vm(args[0])
+        server = get_resource("server", args[0])
 
         flavor = '%s (%s)' % (server.flavor.id, server.flavor.name)
         userid = server.userid

snf-cyclades-app/synnefo/logic/management/commands/stats-cyclades.py

-# Copyright 2013 GRNET S.A. All rights reserved.
+# Copyright 2013-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -31,7 +31,6 @@
 # interpreted as representing official policies, either expressed
 # or implied, of GRNET S.A.
 
-
 import json
 import string
 
@@ -40,7 +39,7 @@ from optparse import make_option
 from snf_django.management.utils import pprint_table, parse_bool
 
 from snf_django.management.commands import SynnefoCommand, CommandError
-from synnefo.management.common import get_backend
+from synnefo.management.common import get_resource
 from synnefo.admin import stats as statistics
 
 
@@ -87,7 +86,7 @@ class Command(SynnefoCommand):
 
     def handle(self, *args, **options):
         if options["backend"] is not None:
-            backend = get_backend(options["backend"])
+            backend = get_resource("backend", options["backend"])
         else:
             backend = None
 

snf-cyclades-app/synnefo/logic/management/commands/subnet-create.py

-# Copyright 2013 GRNET S.A. All rights reserved.
+# Copyright 2013-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -39,8 +39,6 @@ from snf_django.management.utils import parse_bool
 from synnefo.management import pprint
 from synnefo.logic import subnets
 
-import ipaddr
-
 HELP_MSG = """
 
 Create a new subnet without authenticating the user. The limit of one
@@ -103,7 +101,7 @@ class Command(BaseCommand):
         if not cidr:
             raise CommandError("cidr is mandatory")
 
-        user_id = common.get_network(network_id).userid
+        user_id = common.get_resource("network", network_id).userid
         name = options["name"] or ""
         allocation_pools = options["allocation_pools"]
         ipversion = options["ipversion"] or 4

snf-cyclades-app/synnefo/logic/management/commands/subnet-inspect.py

@@ -31,7 +31,7 @@
 # interpreted as representing official policies, either expressed
 # or implied, of GRNET S.A.
 
-from optparse import make_option
+#from optparse import make_option
 
 from django.core.management.base import BaseCommand, CommandError
 from synnefo.management import pprint, common
@@ -46,7 +46,7 @@ class Command(BaseCommand):
         if len(args) != 1:
             raise CommandError("Please provide a subnet ID.")
 
-        subnet = common.get_subnet(args[0])
+        subnet = common.get_resource("subnet", args[0])
 
         pprint.pprint_subnet_in_db(subnet, stdout=self.stdout)
         self.stdout.write("\n\n")

snf-cyclades-app/synnefo/logic/management/commands/subnet-modify.py

-# Copyright 2013 GRNET S.A. All rights reserved.
+# Copyright 2013-2014 GRNET S.A. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or
 # without modification, are permitted provided that the following
@@ -66,8 +66,8 @@ class Command(BaseCommand):
         if not name:
             raise CommandError("--name is mandatory")
 
-        subnet = common.get_subnet(subnet_id)
-        user_id = common.get_network(subnet.network.id).userid
+        subnet = common.get_resource("subnet", subnet_id, for_update=True)
+        user_id = common.get_resource("network", subnet.network.id).userid
 
         subnets.update_subnet(sub_id=subnet_id,
                               name=name,

snf-cyclades-app/synnefo/management/common.py

-# Copyright 2012 GRNET S.A. All rights reserved.
+# Copyright 2012-2014 GRNET S.A. All rights reserved.