Adds config template to vm model (#13450)

* adds config template to vm model #12461

* Add translation tags; collapse config data

* i18n cleanup

* Establish parity with DeviceRenderConfigView

* Move config_template field to RenderConfigMixin

---------

Co-authored-by: Jeremy Stretch <jstretch@netboxlabs.com>

netbox/dcim/migrations/0170_configtemplate.py

@@ -13,7 +13,7 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='device',
             name='config_template',
-            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, related_name='devices', to='extras.configtemplate'),
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, related_name='%(class)ss', to='extras.configtemplate'),
         ),
         migrations.AddField(
             model_name='devicerole',

netbox/dcim/models/devices.py

@@ -24,7 +24,7 @@ from utilities.choices import ColorChoices
 from utilities.fields import ColorField, CounterCacheField, NaturalOrderingField
 from utilities.tracking import TrackingModelMixin
 from .device_components import *
-from .mixins import WeightMixin
+from .mixins import RenderConfigMixin, WeightMixin
 
 
 __all__ = (
@@ -525,7 +525,14 @@ def update_interface_bridges(device, interface_templates, module=None):
             interface.save()
 
 
-class Device(ContactsMixin, ImageAttachmentsMixin, PrimaryModel, ConfigContextModel, TrackingModelMixin):
+class Device(
+    ContactsMixin,
+    ImageAttachmentsMixin,
+    RenderConfigMixin,
+    ConfigContextModel,
+    TrackingModelMixin,
+    PrimaryModel
+):
     """
     A Device represents a piece of physical hardware mounted within a Rack. Each Device is assigned a DeviceType,
     DeviceRole, and (optionally) a Platform. Device names are not required, however if one is set it must be unique.
@@ -686,13 +693,6 @@ class Device(ContactsMixin, ImageAttachmentsMixin, PrimaryModel, ConfigContextMo
         validators=[MaxValueValidator(255)],
         help_text=_('Virtual chassis master election priority')
     )
-    config_template = models.ForeignKey(
-        to='extras.ConfigTemplate',
-        on_delete=models.PROTECT,
-        related_name='devices',
-        blank=True,
-        null=True
-    )
     latitude = models.DecimalField(
         verbose_name=_('latitude'),
         max_digits=8,
@@ -1070,17 +1070,6 @@ class Device(ContactsMixin, ImageAttachmentsMixin, PrimaryModel, ConfigContextMo
     def interfaces_count(self):
         return self.vc_interfaces().count()
 
-    def get_config_template(self):
-        """
-        Return the appropriate ConfigTemplate (if any) for this Device.
-        """
-        if self.config_template:
-            return self.config_template
-        if self.role.config_template:
-            return self.role.config_template
-        if self.platform and self.platform.config_template:
-            return self.platform.config_template
-
     def get_vc_master(self):
         """
         If this Device is a VirtualChassis member, return the VC master. Otherwise, return None.

netbox/dcim/models/mixins.py

@@ -4,6 +4,11 @@ from django.utils.translation import gettext_lazy as _
 from dcim.choices import *
 from utilities.utils import to_grams
 
+__all__ = (
+    'RenderConfigMixin',
+    'WeightMixin',
+)
+
 
 class WeightMixin(models.Model):
     weight = models.DecimalField(
@@ -44,3 +49,27 @@ class WeightMixin(models.Model):
         # Validate weight and weight_unit
         if self.weight and not self.weight_unit:
             raise ValidationError(_("Must specify a unit when setting a weight"))
+
+
+class RenderConfigMixin(models.Model):
+    config_template = models.ForeignKey(
+        to='extras.ConfigTemplate',
+        on_delete=models.PROTECT,
+        related_name='%(class)ss',
+        blank=True,
+        null=True
+    )
+
+    class Meta:
+        abstract = True
+
+    def get_config_template(self):
+        """
+        Return the appropriate ConfigTemplate (if any) for this Device.
+        """
+        if self.config_template:
+            return self.config_template
+        if self.role.config_template:
+            return self.role.config_template
+        if self.platform and self.platform.config_template:
+            return self.platform.config_template