Ditched VMInterface in favor of reusing dcim.Interface

netbox/dcim/models.py

@@ -1152,13 +1152,26 @@ class PowerOutlet(models.Model):
 @python_2_unicode_compatible
 class Interface(models.Model):
     """
-    A physical data interface within a Device. An Interface can connect to exactly one other Interface via the creation
-    of an InterfaceConnection.
+    A network interface within a Device or VirtualMachine. A physical Interface can connect to exactly one other
+    Interface via the creation of an InterfaceConnection.
     """
-    device = models.ForeignKey('Device', related_name='interfaces', on_delete=models.CASCADE)
+    device = models.ForeignKey(
+        to='Device',
+        on_delete=models.CASCADE,
+        related_name='interfaces',
+        null=True,
+        blank=True
+    )
+    virtual_machine = models.ForeignKey(
+        to='virtualization.VirtualMachine',
+        on_delete=models.CASCADE,
+        related_name='interfaces',
+        null=True,
+        blank=True
+    )
     lag = models.ForeignKey(
-        'self',
-        models.SET_NULL,
+        to='self',
+        on_delete=models.SET_NULL,
         related_name='member_interfaces',
         null=True,
         blank=True,
@@ -1175,11 +1188,6 @@ class Interface(models.Model):
         help_text="This interface is used only for out-of-band management"
     )
     description = models.CharField(max_length=100, blank=True)
-    ip_addresses = GenericRelation(
-        to='ipam.IPAddress',
-        content_type_field='interface_type',
-        object_id_field='interface_id'
-    )
 
     objects = InterfaceQuerySet.as_manager()
 
@@ -1192,6 +1200,18 @@ class Interface(models.Model):
 
     def clean(self):
 
+        # An Interface must belong to a Device *or* to a VirtualMachine
+        if self.device and self.virtual_machine:
+            raise ValidationError("An interface cannot belong to both a device and a virtual machine.")
+        if not self.device and not self.virtual_machine:
+            raise ValidationError("An interface must belong to either a device or a virtual machine.")
+
+        # VM interfaces must be virtual
+        if self.virtual_machine and self.form_factor not in VIRTUAL_IFACE_TYPES:
+            raise ValidationError({
+                'form_factor': "Virtual machines cannot have physical interfaces."
+            })
+
         # Virtual interfaces cannot be connected
         if self.form_factor in NONCONNECTABLE_IFACE_TYPES and self.is_connected:
             raise ValidationError({