Closes #19740: Enable recursive nesting for platforms

Author: jeremystretch

docs/models/dcim/platform.md

@@ -2,12 +2,20 @@
 
 A platform defines the type of software running on a [device](./device.md) or [virtual machine](../virtualization/virtualmachine.md). This can be helpful to model when it is necessary to distinguish between different versions or feature sets. Note that two devices of the same type may be assigned different platforms: For example, one Juniper MX240 might run Junos 14 while another runs Junos 15.
 
+Platforms may be nested under parents to form a hierarchy. For example, platforms named "Debian" and "RHEL" might both be created under a generic "Linux" parent.
+
 Platforms may optionally be limited by [manufacturer](./manufacturer.md): If a platform is assigned to a particular manufacturer, it can only be assigned to devices with a type belonging to that manufacturer.
 
-The assignment of platforms to devices is an optional feature, and may be disregarded if not desired.
+The assignment of platforms to devices and virtual machines is an optional.
 
 ## Fields
 
+## Parent
+
+!!! "This field was introduced in NetBox v4.4."
+
+The parent platform class to which this platform belongs (optional).
+
 ### Name
 
 A human-friendly name for the platform. Must be unique per manufacturer.

netbox/dcim/api/serializers_/nested.py

@@ -6,11 +6,13 @@
 
 __all__ = (
     'NestedDeviceBaySerializer',
+    'NestedDeviceRoleSerializer',
     'NestedDeviceSerializer',
     'NestedInterfaceSerializer',
     'NestedInterfaceTemplateSerializer',
     'NestedLocationSerializer',
     'NestedModuleBaySerializer',
+    'NestedPlatformSerializer',
     'NestedRegionSerializer',
     'NestedSiteGroupSerializer',
 )
@@ -102,3 +104,10 @@ class NestedModuleBaySerializer(WritableNestedSerializer):
     class Meta:
         model = models.ModuleBay
         fields = ['id', 'url', 'display_url', 'display', 'name']
+
+
+class NestedPlatformSerializer(WritableNestedSerializer):
+
+    class Meta:
+        model = models.Platform
+        fields = ['id', 'url', 'display_url', 'display', 'name']

netbox/dcim/api/serializers_/platforms.py

@@ -1,15 +1,17 @@
 from dcim.models import Platform
 from extras.api.serializers_.configtemplates import ConfigTemplateSerializer
 from netbox.api.fields import RelatedObjectCountField
-from netbox.api.serializers import NetBoxModelSerializer
+from netbox.api.serializers import NestedGroupModelSerializer
 from .manufacturers import ManufacturerSerializer
+from .nested import NestedPlatformSerializer
 
 __all__ = (
     'PlatformSerializer',
 )
 
 
-class PlatformSerializer(NetBoxModelSerializer):
+class PlatformSerializer(NestedGroupModelSerializer):
+    parent = NestedPlatformSerializer(required=False, allow_null=True, default=None)
     manufacturer = ManufacturerSerializer(nested=True, required=False, allow_null=True)
     config_template = ConfigTemplateSerializer(nested=True, required=False, allow_null=True, default=None)
 
@@ -20,7 +22,10 @@ class PlatformSerializer(NetBoxModelSerializer):
     class Meta:
         model = Platform
         fields = [
-            'id', 'url', 'display_url', 'display', 'name', 'slug', 'manufacturer', 'config_template', 'description',
-            'tags', 'custom_fields', 'created', 'last_updated', 'device_count', 'virtualmachine_count',
+            'id', 'url', 'display_url', 'display', 'parent', 'name', 'slug', 'manufacturer', 'config_template',
+            'description', 'tags', 'custom_fields', 'created', 'last_updated', 'device_count', 'virtualmachine_count',
+            '_depth',
         ]
-        brief_fields = ('id', 'url', 'display', 'name', 'slug', 'description', 'device_count', 'virtualmachine_count')
+        brief_fields = (
+            'id', 'url', 'display', 'name', 'slug', 'description', 'device_count', 'virtualmachine_count', '_depth',
+        )

netbox/dcim/filtersets.py

@@ -547,14 +547,17 @@ class DeviceTypeFilterSet(NetBoxModelFilterSet):
         to_field_name='slug',
         label=_('Manufacturer (slug)'),
     )
-    default_platform_id = django_filters.ModelMultipleChoiceFilter(
+    default_platform_id = TreeNodeMultipleChoiceFilter(
         queryset=Platform.objects.all(),
+        field_name='default_platform',
+        lookup_expr='in',
         label=_('Default platform (ID)'),
     )
-    default_platform = django_filters.ModelMultipleChoiceFilter(
-        field_name='default_platform__slug',
+    default_platform = TreeNodeMultipleChoiceFilter(
         queryset=Platform.objects.all(),
+        field_name='default_platform',
         to_field_name='slug',
+        lookup_expr='in',
         label=_('Default platform (slug)'),
     )
     has_front_image = django_filters.BooleanFilter(
@@ -979,6 +982,29 @@ class Meta:
 
 
 class PlatformFilterSet(OrganizationalModelFilterSet):
+    parent_id = django_filters.ModelMultipleChoiceFilter(
+        queryset=Platform.objects.all(),
+        label=_('Immediate parent platform (ID)'),
+    )
+    parent = django_filters.ModelMultipleChoiceFilter(
+        field_name='parent__slug',
+        queryset=Platform.objects.all(),
+        to_field_name='slug',
+        label=_('Immediate parent platform (slug)'),
+    )
+    ancestor_id = TreeNodeMultipleChoiceFilter(
+        queryset=Platform.objects.all(),
+        field_name='parent',
+        lookup_expr='in',
+        label=_('Parent platform (ID)'),
+    )
+    ancestor = TreeNodeMultipleChoiceFilter(
+        queryset=Platform.objects.all(),
+        field_name='parent',
+        lookup_expr='in',
+        to_field_name='slug',
+        label=_('Parent platform (slug)'),
+    )
     manufacturer_id = django_filters.ModelMultipleChoiceFilter(
         field_name='manufacturer',
         queryset=Manufacturer.objects.all(),
@@ -1058,14 +1084,17 @@ class DeviceFilterSet(
         queryset=Device.objects.all(),
         label=_('Parent Device (ID)'),
     )
-    platform_id = django_filters.ModelMultipleChoiceFilter(
+    platform_id = TreeNodeMultipleChoiceFilter(
         queryset=Platform.objects.all(),
+        field_name='platform',
+        lookup_expr='in',
         label=_('Platform (ID)'),
     )
-    platform = django_filters.ModelMultipleChoiceFilter(
-        field_name='platform__slug',
+    platform = TreeNodeMultipleChoiceFilter(
+        field_name='platform',
         queryset=Platform.objects.all(),
         to_field_name='slug',
+        lookup_expr='in',
         label=_('Platform (slug)'),
     )
     region_id = TreeNodeMultipleChoiceFilter(

netbox/dcim/forms/bulk_edit.py

@@ -682,6 +682,11 @@ class DeviceRoleBulkEditForm(NetBoxModelBulkEditForm):
 
 
 class PlatformBulkEditForm(NetBoxModelBulkEditForm):
+    parent = DynamicModelChoiceField(
+        label=_('Parent'),
+        queryset=Platform.objects.all(),
+        required=False,
+    )
     manufacturer = DynamicModelChoiceField(
         label=_('Manufacturer'),
         queryset=Manufacturer.objects.all(),
@@ -697,12 +702,13 @@ class PlatformBulkEditForm(NetBoxModelBulkEditForm):
         max_length=200,
         required=False
     )
+    comments = CommentField()
 
     model = Platform
     fieldsets = (
-        FieldSet('manufacturer', 'config_template', 'description'),
+        FieldSet('parent', 'manufacturer', 'config_template', 'description'),
     )
-    nullable_fields = ('manufacturer', 'config_template', 'description')
+    nullable_fields = ('parent', 'manufacturer', 'config_template', 'description', 'comments')
 
 
 class DeviceBulkEditForm(NetBoxModelBulkEditForm):

netbox/dcim/forms/bulk_import.py

@@ -504,6 +504,16 @@ class Meta:
 
 class PlatformImportForm(NetBoxModelImportForm):
     slug = SlugField()
+    parent = CSVModelChoiceField(
+        label=_('Parent'),
+        queryset=Platform.objects.all(),
+        required=False,
+        to_field_name='name',
+        help_text=_('Parent platform'),
+        error_messages={
+            'invalid_choice': _('Platform not found.'),
+        }
+    )
     manufacturer = CSVModelChoiceField(
         label=_('Manufacturer'),
         queryset=Manufacturer.objects.all(),
@@ -522,7 +532,7 @@ class PlatformImportForm(NetBoxModelImportForm):
     class Meta:
         model = Platform
         fields = (
-            'name', 'slug', 'manufacturer', 'config_template', 'description', 'tags',
+            'name', 'slug', 'parent', 'manufacturer', 'config_template', 'description', 'tags',
         )
 
 

netbox/dcim/forms/filtersets.py

@@ -714,6 +714,11 @@ class DeviceRoleFilterForm(NetBoxModelFilterSetForm):
 class PlatformFilterForm(NetBoxModelFilterSetForm):
     model = Platform
     selector_fields = ('filter_id', 'q', 'manufacturer_id')
+    parent_id = DynamicModelMultipleChoiceField(
+        queryset=Platform.objects.all(),
+        required=False,
+        label=_('Parent')
+    )
     manufacturer_id = DynamicModelMultipleChoiceField(
         queryset=Manufacturer.objects.all(),
         required=False,

netbox/dcim/forms/model_forms.py

@@ -536,6 +536,11 @@ class Meta:
 
 
 class PlatformForm(NetBoxModelForm):
+    parent = DynamicModelChoiceField(
+        label=_('Parent'),
+        queryset=Platform.objects.all(),
+        required=False,
+    )
     manufacturer = DynamicModelChoiceField(
         label=_('Manufacturer'),
         queryset=Manufacturer.objects.all(),
@@ -551,15 +556,18 @@ class PlatformForm(NetBoxModelForm):
         label=_('Slug'),
         max_length=64
     )
+    comments = CommentField()
 
     fieldsets = (
-        FieldSet('name', 'slug', 'manufacturer', 'config_template', 'description', 'tags', name=_('Platform')),
+        FieldSet(
+            'name', 'slug', 'parent', 'manufacturer', 'config_template', 'description', 'tags', name=_('Platform'),
+        ),
     )
 
     class Meta:
         model = Platform
         fields = [
-            'name', 'slug', 'manufacturer', 'config_template', 'description', 'tags',
+            'name', 'slug', 'parent', 'manufacturer', 'config_template', 'description', 'comments', 'tags',
         ]
 
 

netbox/dcim/graphql/types.py

@@ -633,6 +633,8 @@ class ModuleTypeType(NetBoxObjectType):
     pagination=True
 )
 class PlatformType(OrganizationalObjectType):
+    parent: Annotated['PlatformType', strawberry.lazy('dcim.graphql.types')] | None
+    children: List[Annotated['PlatformType', strawberry.lazy('dcim.graphql.types')]]
     manufacturer: Annotated["ManufacturerType", strawberry.lazy('dcim.graphql.types')] | None
     config_template: Annotated["ConfigTemplateType", strawberry.lazy('extras.graphql.types')] | None
 

netbox/dcim/migrations/0211_platform_parent.py

@@ -0,0 +1,55 @@
+import django.db.models.deletion
+import mptt.fields
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('dcim', '0210_interface_tx_power_negative'),
+    ]
+
+    operations = [
+        # Add parent & MPTT fields
+        migrations.AddField(
+            model_name='platform',
+            name='parent',
+            field=mptt.fields.TreeForeignKey(
+                blank=True,
+                null=True,
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name='children',
+                to='dcim.platform'
+            ),
+        ),
+        migrations.AddField(
+            model_name='platform',
+            name='level',
+            field=models.PositiveIntegerField(default=0, editable=False),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='platform',
+            name='lft',
+            field=models.PositiveIntegerField(default=0, editable=False),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='platform',
+            name='rght',
+            field=models.PositiveIntegerField(default=0, editable=False),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='platform',
+            name='tree_id',
+            field=models.PositiveIntegerField(db_index=True, default=0, editable=False),
+            preserve_default=False,
+        ),
+        # Add comments field
+        migrations.AddField(
+            model_name='platform',
+            name='comments',
+            field=models.TextField(blank=True),
+        ),
+    ]