diff --git a/ironic/objects/base.py b/ironic/objects/base.py
index 25d4add641c..61af72b10e8 100644
--- a/ironic/objects/base.py
+++ b/ironic/objects/base.py
@@ -74,6 +74,21 @@ class IronicObject(object_base.VersionedObject):
                     self[field] != loaded_object[field]):
                 self[field] = loaded_object[field]
 
+    @staticmethod
+    def _from_db_object(obj, db_object):
+        """Converts a database entity to a formal object.
+
+        :param obj: An object of the class.
+        :param db_object: A DB model of the object
+        :return: The object of the class with the database entity added
+        """
+
+        for field in obj.fields:
+            obj[field] = db_object[field]
+
+        obj.obj_reset_changes()
+        return obj
+
 
 class IronicObjectIndirectionAPI(object_base.VersionedObjectIndirectionAPI):
     def __init__(self):
diff --git a/ironic/objects/chassis.py b/ironic/objects/chassis.py
index 8983ca0a7e2..4ade052fe90 100644
--- a/ironic/objects/chassis.py
+++ b/ironic/objects/chassis.py
@@ -41,20 +41,6 @@ class Chassis(base.IronicObject, object_base.VersionedObjectDictCompat):
         'description': object_fields.StringField(nullable=True),
     }
 
-    @staticmethod
-    def _from_db_object(chassis, db_chassis):
-        """Converts a database entity to a formal :class:`Chassis` object.
-
-        :param chassis: An object of :class:`Chassis`.
-        :param db_chassis: A DB model of a chassis.
-        :return: a :class:`Chassis` object.
-        """
-        for field in chassis.fields:
-            chassis[field] = db_chassis[field]
-
-        chassis.obj_reset_changes()
-        return chassis
-
     # NOTE(xek): We don't want to enable RPC on this call just yet. Remotable
     # methods can be used in the future to replace current explicit RPC calls.
     # Implications of calling new remote procedures should be thought through.
diff --git a/ironic/objects/conductor.py b/ironic/objects/conductor.py
index e0028e93a2f..56ce7cdb75e 100644
--- a/ironic/objects/conductor.py
+++ b/ironic/objects/conductor.py
@@ -33,15 +33,6 @@ class Conductor(base.IronicObject, object_base.VersionedObjectDictCompat):
         'hostname': object_fields.StringField(),
     }
 
-    @staticmethod
-    def _from_db_object(conductor, db_obj):
-        """Converts a database entity to a formal object."""
-        for field in conductor.fields:
-            conductor[field] = db_obj[field]
-
-        conductor.obj_reset_changes()
-        return conductor
-
     # NOTE(xek): We don't want to enable RPC on this call just yet. Remotable
     # methods can be used in the future to replace current explicit RPC calls.
     # Implications of calling new remote procedures should be thought through.
diff --git a/ironic/objects/node.py b/ironic/objects/node.py
index 11536ac00a6..2e5049b7a1e 100644
--- a/ironic/objects/node.py
+++ b/ironic/objects/node.py
@@ -103,14 +103,6 @@ class Node(base.IronicObject, object_base.VersionedObjectDictCompat):
         'extra': object_fields.FlexibleDictField(nullable=True),
     }
 
-    @staticmethod
-    def _from_db_object(node, db_node):
-        """Converts a database entity to a formal object."""
-        for field in node.fields:
-            node[field] = db_node[field]
-        node.obj_reset_changes()
-        return node
-
     def _validate_property_values(self, properties):
         """Check if the input of local_gb, cpus and memory_mb are valid.
 
diff --git a/ironic/objects/port.py b/ironic/objects/port.py
index a93365b9a56..7a0ede80887 100644
--- a/ironic/objects/port.py
+++ b/ironic/objects/port.py
@@ -50,15 +50,6 @@ class Port(base.IronicObject, object_base.VersionedObjectDictCompat):
         'pxe_enabled': object_fields.BooleanField()
     }
 
-    @staticmethod
-    def _from_db_object(port, db_port):
-        """Converts a database entity to a formal object."""
-        for field in port.fields:
-            port[field] = db_port[field]
-
-        port.obj_reset_changes()
-        return port
-
     @staticmethod
     def _from_db_object_list(db_objects, cls, context):
         """Converts a list of database entities to a list of formal objects."""
diff --git a/ironic/objects/portgroup.py b/ironic/objects/portgroup.py
index b3d83a53145..388ae297352 100644
--- a/ironic/objects/portgroup.py
+++ b/ironic/objects/portgroup.py
@@ -40,15 +40,6 @@ class Portgroup(base.IronicObject, object_base.VersionedObjectDictCompat):
         'extra': object_fields.FlexibleDictField(nullable=True),
     }
 
-    @staticmethod
-    def _from_db_object(portgroup, db_portgroup):
-        """Converts a database entity to a formal object."""
-        for field in portgroup.fields:
-            portgroup[field] = db_portgroup[field]
-
-        portgroup.obj_reset_changes()
-        return portgroup
-
     @staticmethod
     def _from_db_object_list(db_objects, cls, context):
         """Converts a list of database entities to a list of formal objects."""