diff --git a/ironic/api/controllers/base.py b/ironic/api/controllers/base.py
index 41ddf31e59..73d7f9a086 100644
--- a/ironic/api/controllers/base.py
+++ b/ironic/api/controllers/base.py
@@ -17,7 +17,6 @@ import functools
 
 from webob import exc
 import wsme
-from wsme import types as wtypes
 
 from ironic.common.i18n import _
 
@@ -43,13 +42,12 @@ class AsDictMixin(object):
                     and getattr(self, k) != wsme.Unset)
 
 
-class APIBase(wtypes.Base, AsDictMixin):
-
-    created_at = wsme.wsattr(datetime.datetime, readonly=True)
-    """The time in UTC at which the object is created"""
-
-    updated_at = wsme.wsattr(datetime.datetime, readonly=True)
-    """The time in UTC at which the object is updated"""
+class Base(AsDictMixin):
+    """Base type for complex types"""
+    def __init__(self, **kw):
+        for key, value in kw.items():
+            if hasattr(self, key):
+                setattr(self, key, value)
 
     def unset_fields_except(self, except_list=None):
         """Unset fields so they don't appear in the message body.
@@ -65,6 +63,15 @@ class APIBase(wtypes.Base, AsDictMixin):
                 setattr(self, k, wsme.Unset)
 
 
+class APIBase(Base):
+
+    created_at = wsme.wsattr(datetime.datetime, readonly=True)
+    """The time in UTC at which the object is created"""
+
+    updated_at = wsme.wsattr(datetime.datetime, readonly=True)
+    """The time in UTC at which the object is updated"""
+
+
 @functools.total_ordering
 class Version(object):
     """API Version object."""
diff --git a/ironic/api/controllers/link.py b/ironic/api/controllers/link.py
index a19e3b2ade..6f5f072b92 100644
--- a/ironic/api/controllers/link.py
+++ b/ironic/api/controllers/link.py
@@ -31,7 +31,7 @@ def build_url(resource, resource_args, bookmark=False, base_url=None):
     return template % {'url': base_url, 'res': resource, 'args': resource_args}
 
 
-class Link(base.APIBase):
+class Link(base.Base):
     """A link representation."""
 
     href = str
diff --git a/ironic/api/controllers/root.py b/ironic/api/controllers/root.py
index ece2b6dc45..42308fd826 100644
--- a/ironic/api/controllers/root.py
+++ b/ironic/api/controllers/root.py
@@ -23,7 +23,7 @@ from ironic.api.controllers import version
 from ironic.api import expose
 
 
-class Root(base.APIBase):
+class Root(base.Base):
 
     name = str
     """The name of the API"""
diff --git a/ironic/api/controllers/v1/__init__.py b/ironic/api/controllers/v1/__init__.py
index ee26308fe7..cd568881f5 100644
--- a/ironic/api/controllers/v1/__init__.py
+++ b/ironic/api/controllers/v1/__init__.py
@@ -57,7 +57,7 @@ def max_version():
         versions.min_version_string(), versions.max_version_string())
 
 
-class MediaType(base.APIBase):
+class MediaType(base.Base):
     """A media type representation."""
 
     base = str
@@ -68,7 +68,7 @@ class MediaType(base.APIBase):
         self.type = type
 
 
-class V1(base.APIBase):
+class V1(base.Base):
     """The representation of the version 1 of the API."""
 
     id = str
diff --git a/ironic/api/controllers/v1/bios.py b/ironic/api/controllers/v1/bios.py
index 11ef23cb27..7be088c722 100644
--- a/ironic/api/controllers/v1/bios.py
+++ b/ironic/api/controllers/v1/bios.py
@@ -67,7 +67,7 @@ class BIOSSetting(base.APIBase):
         return cls._convert_with_links(bios, node_uuid, api.request.host_url)
 
 
-class BIOSSettingsCollection(wtypes.Base):
+class BIOSSettingsCollection(base.Base):
     """API representation of the bios settings for a node."""
 
     bios = [BIOSSetting]
diff --git a/ironic/api/controllers/v1/collection.py b/ironic/api/controllers/v1/collection.py
index 873621b125..cb65b9793d 100644
--- a/ironic/api/controllers/v1/collection.py
+++ b/ironic/api/controllers/v1/collection.py
@@ -20,7 +20,7 @@ from ironic.api.controllers import base
 from ironic.api.controllers import link
 
 
-class Collection(base.APIBase):
+class Collection(base.Base):
 
     next = str
     """A link to retrieve the next subset of the collection"""
diff --git a/ironic/api/controllers/v1/driver.py b/ironic/api/controllers/v1/driver.py
index c6a3f66752..efe6d31d6d 100644
--- a/ironic/api/controllers/v1/driver.py
+++ b/ironic/api/controllers/v1/driver.py
@@ -84,7 +84,7 @@ def hide_fields_in_newer_versions(obj):
         obj.enabled_bios_interfaces = wsme.Unset
 
 
-class Driver(base.APIBase):
+class Driver(base.Base):
     """API representation of a driver."""
 
     name = str
@@ -209,7 +209,7 @@ class Driver(base.APIBase):
         return sample
 
 
-class DriverList(base.APIBase):
+class DriverList(base.Base):
     """API representation of a list of drivers."""
 
     drivers = [Driver]
diff --git a/ironic/api/controllers/v1/node.py b/ironic/api/controllers/v1/node.py
index d2454bab10..c322d3e20e 100644
--- a/ironic/api/controllers/v1/node.py
+++ b/ironic/api/controllers/v1/node.py
@@ -309,7 +309,7 @@ class NodeManagementController(rest.RestController):
     """Expose inject_nmi as a sub-element of management"""
 
 
-class ConsoleInfo(base.APIBase):
+class ConsoleInfo(base.Base):
     """API representation of the console information for a node."""
 
     console_enabled = types.boolean
@@ -1454,7 +1454,7 @@ class NodeMaintenanceController(rest.RestController):
 
 # NOTE(vsaienko) We don't support pagination with VIFs, so we don't use
 # collection.Collection here.
-class VifCollection(wtypes.Base):
+class VifCollection(base.Base):
     """API representation of a collection of VIFs. """
 
     vifs = [types.viftype]
diff --git a/ironic/api/controllers/v1/types.py b/ironic/api/controllers/v1/types.py
index 6df548a469..b0be55bd86 100644
--- a/ironic/api/controllers/v1/types.py
+++ b/ironic/api/controllers/v1/types.py
@@ -24,6 +24,7 @@ from oslo_utils import uuidutils
 import wsme
 from wsme import types as wtypes
 
+from ironic.api.controllers import base
 from ironic.api.controllers.v1 import utils as v1_utils
 from ironic.common import exception
 from ironic.common.i18n import _
@@ -192,7 +193,7 @@ listtype = ListType()
 jsontype = JsonType()
 
 
-class JsonPatchType(wtypes.Base):
+class JsonPatchType(base.Base):
     """A complex type that represents a single json-patch operation."""
 
     path = wtypes.wsattr(wtypes.StringType(pattern='^(/[\\w-]+)+$'),
diff --git a/ironic/api/controllers/version.py b/ironic/api/controllers/version.py
index f83243da5d..a24ab32c65 100644
--- a/ironic/api/controllers/version.py
+++ b/ironic/api/controllers/version.py
@@ -17,7 +17,7 @@ from ironic.api.controllers import link
 ID_VERSION1 = 'v1'
 
 
-class Version(base.APIBase):
+class Version(base.Base):
     """An API version representation.
 
     This class represents an API version, including the minimum and