feat(dcim): Add enabled field to Module and Device bays

Add an `enabled` boolean field to ModuleBay, ModuleBayTemplate,
DeviceBay, and DeviceBayTemplate models. Disabled bays prevent component
installation and display accordingly in the UI. Update serializers,
filters, forms, and tables to support the new field.

Fixes #20152

docs/models/dcim/devicebay.md

@@ -23,3 +23,8 @@ The device bay's name. Must be unique to the parent device.
 ### Label
 
 An alternative physical label identifying the device bay.
+
+### Enabled
+
+Whether this device bay is enabled. Disabled device bays are not available for installation.
+

docs/models/dcim/modulebay.md

@@ -1,6 +1,6 @@
 # Module Bays
 
-Module bays represent a space or slot within a device in which a field-replaceable [module](./module.md) may be installed. A common example is that of a chassis-based switch such as the Cisco Nexus 9000 or Juniper EX9200. Modules in turn hold additional components that become available to the parent device.
+Module bays represent a space or slot within a device in which a field-replaceable [module](./module.md) may be installed. A common example is that of a chassis-based switch such as the Cisco Nexus 9000 or Juniper EX9200. Modules, in turn, hold additional components that become available to the parent device.
 
 !!! note
     If you need to model child devices rather than modules, use a [device bay](./devicebay.md) instead.
@@ -29,3 +29,8 @@ An alternative physical label identifying the module bay.
 ### Position
 
 The numeric position in which this module bay is situated. For example, this would be the number assigned to a slot within a chassis-based switch.
+
+### Enabled
+
+Whether this module bay is enabled. Disabled module bays are not available for installation.
+

netbox/dcim/api/serializers_/device_components.py

@@ -423,27 +423,29 @@ class ModuleBaySerializer(OwnerMixin, NetBoxModelSerializer):
         required=False,
         allow_null=True
     )
+    _occupied = serializers.BooleanField(required=False, read_only=True)
 
     class Meta:
         model = ModuleBay
         fields = [
-            'id', 'url', 'display_url', 'display', 'device', 'module', 'name', 'installed_module', 'label', 'position',
-            'description', 'owner', 'tags', 'custom_fields', 'created', 'last_updated',
+            'id', 'url', 'display_url', 'display', 'device', 'module', 'name', 'label', 'position', 'enabled',
+            'description', 'installed_module', 'owner', 'tags', 'custom_fields', 'created', 'last_updated', '_occupied',
         ]
-        brief_fields = ('id', 'url', 'display', 'installed_module', 'name', 'description')
+        brief_fields = ('id', 'url', 'display', 'installed_module', 'name', 'enabled', 'description', '_occupied')
 
 
 class DeviceBaySerializer(OwnerMixin, NetBoxModelSerializer):
     device = DeviceSerializer(nested=True)
     installed_device = DeviceSerializer(nested=True, required=False, allow_null=True)
+    _occupied = serializers.BooleanField(required=False, read_only=True)
 
     class Meta:
         model = DeviceBay
         fields = [
-            'id', 'url', 'display_url', 'display', 'device', 'name', 'label', 'description', 'installed_device',
-            'owner', 'tags', 'custom_fields', 'created', 'last_updated',
+            'id', 'url', 'display_url', 'display', 'device', 'name', 'label', 'enabled', 'description',
+            'installed_device', 'owner', 'tags', 'custom_fields', 'created', 'last_updated', '_occupied',
         ]
-        brief_fields = ('id', 'url', 'display', 'device', 'name', 'description')
+        brief_fields = ('id', 'url', 'display', 'device', 'name', 'enabled', 'description', '_occupied',)
 
 
 class InventoryItemSerializer(OwnerMixin, NetBoxModelSerializer):

netbox/dcim/api/serializers_/devicetype_components.py

@@ -317,10 +317,10 @@ class ModuleBayTemplateSerializer(ComponentTemplateSerializer):
     class Meta:
         model = ModuleBayTemplate
         fields = [
-            'id', 'url', 'display', 'device_type', 'module_type', 'name', 'label', 'position', 'description',
+            'id', 'url', 'display', 'device_type', 'module_type', 'name', 'label', 'position', 'enabled', 'description',
             'created', 'last_updated',
         ]
-        brief_fields = ('id', 'url', 'display', 'name', 'description')
+        brief_fields = ('id', 'url', 'display', 'name', 'enabled', 'description')
 
 
 class DeviceBayTemplateSerializer(ComponentTemplateSerializer):
@@ -331,10 +331,10 @@ class DeviceBayTemplateSerializer(ComponentTemplateSerializer):
     class Meta:
         model = DeviceBayTemplate
         fields = [
-            'id', 'url', 'display', 'device_type', 'name', 'label', 'description',
+            'id', 'url', 'display', 'device_type', 'name', 'label', 'enabled', 'description',
             'created', 'last_updated'
         ]
-        brief_fields = ('id', 'url', 'display', 'name', 'description')
+        brief_fields = ('id', 'url', 'display', 'name', 'enabled', 'description')
 
 
 class InventoryItemTemplateSerializer(ComponentTemplateSerializer):

netbox/dcim/filtersets.py

@@ -1032,7 +1032,7 @@ class ModuleBayTemplateFilterSet(ChangeLoggedModelFilterSet, ModularDeviceTypeCo
 
     class Meta:
         model = ModuleBayTemplate
-        fields = ('id', 'name', 'label', 'position', 'description')
+        fields = ('id', 'name', 'label', 'position', 'enabled', 'description')
 
 
 @register_filterset
@@ -1040,7 +1040,7 @@ class DeviceBayTemplateFilterSet(ChangeLoggedModelFilterSet, DeviceTypeComponent
 
     class Meta:
         model = DeviceBayTemplate
-        fields = ('id', 'name', 'label', 'description')
+        fields = ('id', 'name', 'label', 'enabled', 'description')
 
 
 @register_filterset
@@ -2397,7 +2397,7 @@ class ModuleBayFilterSet(ModularDeviceComponentFilterSet):
 
     class Meta:
         model = ModuleBay
-        fields = ('id', 'name', 'label', 'position', 'description')
+        fields = ('id', 'name', 'label', 'position', 'enabled', 'description')
 
 
 @register_filterset
@@ -2417,7 +2417,7 @@ class DeviceBayFilterSet(DeviceComponentFilterSet):
 
     class Meta:
         model = DeviceBay
-        fields = ('id', 'name', 'label', 'description')
+        fields = ('id', 'name', 'label', 'enabled', 'description')
 
 
 @register_filterset

netbox/dcim/forms/bulk_create.py

@@ -108,10 +108,13 @@ class RearPortBulkCreateForm(
     field_order = ('name', 'label', 'type', 'positions', 'mark_connected', 'description', 'tags')
 
 
-class ModuleBayBulkCreateForm(DeviceBulkAddComponentForm):
+class ModuleBayBulkCreateForm(
+    form_from_model(ModuleBay, ['enabled']),
+    DeviceBulkAddComponentForm
+):
     model = ModuleBay
-    field_order = ('name', 'label', 'position', 'description', 'tags')
-    replication_fields = ('name', 'label', 'position')
+    field_order = ('name', 'label', 'position', 'enabled', 'description', 'tags')
+    replication_fields = ('name', 'label', 'position', 'enabled')
     position = ExpandableNameField(
         label=_('Position'),
         required=False,
@@ -119,9 +122,12 @@ class ModuleBayBulkCreateForm(DeviceBulkAddComponentForm):
     )
 
 
-class DeviceBayBulkCreateForm(DeviceBulkAddComponentForm):
+class DeviceBayBulkCreateForm(
+    form_from_model(DeviceBay, ['enabled']),
+    DeviceBulkAddComponentForm
+):
     model = DeviceBay
-    field_order = ('name', 'label', 'description', 'tags')
+    field_order = ('name', 'label', 'enabled', 'description', 'tags')
 
 
 class InventoryItemBulkCreateForm(

netbox/dcim/forms/bulk_edit.py

@@ -1245,6 +1245,11 @@ class ModuleBayTemplateBulkEditForm(ComponentTemplateBulkEditForm):
         label=_('Description'),
         required=False
     )
+    enabled = forms.NullBooleanField(
+        label=_('Enabled'),
+        required=False,
+        widget=BulkEditNullBooleanSelect,
+    )
 
     nullable_fields = ('label', 'position', 'description')
 
@@ -1263,6 +1268,11 @@ class DeviceBayTemplateBulkEditForm(ComponentTemplateBulkEditForm):
         label=_('Description'),
         required=False
     )
+    enabled = forms.NullBooleanField(
+        label=_('Enabled'),
+        required=False,
+        widget=BulkEditNullBooleanSelect,
+    )
 
     nullable_fields = ('label', 'description')
 
@@ -1687,23 +1697,23 @@ class RearPortBulkEditForm(
 
 
 class ModuleBayBulkEditForm(
-    form_from_model(ModuleBay, ['label', 'position', 'description']),
+    form_from_model(ModuleBay, ['label', 'position', 'enabled', 'description']),
     NetBoxModelBulkEditForm
 ):
     model = ModuleBay
     fieldsets = (
-        FieldSet('label', 'position', 'description'),
+        FieldSet('label', 'position', 'enabled', 'description'),
     )
     nullable_fields = ('label', 'position', 'description')
 
 
 class DeviceBayBulkEditForm(
-    form_from_model(DeviceBay, ['label', 'description']),
+    form_from_model(DeviceBay, ['label', 'enabled', 'description']),
     NetBoxModelBulkEditForm
 ):
     model = DeviceBay
     fieldsets = (
-        FieldSet('label', 'description'),
+        FieldSet('label', 'enabled', 'description'),
     )
     nullable_fields = ('label', 'description')
 

netbox/dcim/forms/bulk_import.py

@@ -1154,7 +1154,13 @@ class ModuleBayImportForm(OwnerCSVMixin, NetBoxModelImportForm):
 
     class Meta:
         model = ModuleBay
-        fields = ('device', 'name', 'label', 'position', 'description', 'owner', 'tags')
+        fields = ('device', 'name', 'label', 'position', 'enabled', 'description', 'owner', 'tags')
+
+    def clean_enabled(self):
+        # Make sure enabled is True when it's not included in the uploaded data
+        if 'enabled' not in self.data:
+            return True
+        return self.cleaned_data['enabled']
 
 
 class DeviceBayImportForm(OwnerCSVMixin, NetBoxModelImportForm):
@@ -1176,7 +1182,7 @@ class DeviceBayImportForm(OwnerCSVMixin, NetBoxModelImportForm):
 
     class Meta:
         model = DeviceBay
-        fields = ('device', 'name', 'label', 'installed_device', 'description', 'owner', 'tags')
+        fields = ('device', 'name', 'label', 'enabled', 'installed_device', 'description', 'owner', 'tags')
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -1204,6 +1210,12 @@ class DeviceBayImportForm(OwnerCSVMixin, NetBoxModelImportForm):
         else:
             self.fields['installed_device'].queryset = Device.objects.none()
 
+    def clean_enabled(self):
+        # Make sure enabled is True when it's not included in the uploaded data
+        if 'enabled' not in self.data:
+            return True
+        return self.cleaned_data['enabled']
+
 
 class InventoryItemImportForm(OwnerCSVMixin, NetBoxModelImportForm):
     device = CSVModelChoiceField(

netbox/dcim/forms/filtersets.py

@@ -1870,7 +1870,7 @@ class ModuleBayFilterForm(DeviceComponentFilterForm):
     model = ModuleBay
     fieldsets = (
         FieldSet('q', 'filter_id', 'tag'),
-        FieldSet('name', 'label', 'position', name=_('Attributes')),
+        FieldSet('name', 'label', 'position', 'enabled', name=_('Attributes')),
         FieldSet('region_id', 'site_group_id', 'site_id', 'location_id', 'rack_id', name=_('Location')),
         FieldSet(
             'tenant_id', 'device_type_id', 'device_role_id', 'device_id', 'device_status', 'virtual_chassis_id',
@@ -1878,31 +1878,41 @@ class ModuleBayFilterForm(DeviceComponentFilterForm):
         ),
         FieldSet('owner_group_id', 'owner_id', name=_('Ownership')),
     )
-    tag = TagFilterField(model)
     position = forms.CharField(
         label=_('Position'),
         required=False
     )
+    enabled = forms.NullBooleanField(
+        label=_('Enabled'),
+        required=False,
+        widget=forms.Select(choices=BOOLEAN_WITH_BLANK_CHOICES),
+    )
+    tag = TagFilterField(model)
 
 
 class ModuleBayTemplateFilterForm(ModularDeviceComponentTemplateFilterForm):
     model = ModuleBayTemplate
     fieldsets = (
         FieldSet('q', 'filter_id', 'tag'),
-        FieldSet('name', 'label', 'position', name=_('Attributes')),
+        FieldSet('name', 'label', 'position', 'enabled', name=_('Attributes')),
         FieldSet('device_type_id', 'module_type_id', name=_('Device')),
     )
     position = forms.CharField(
         label=_('Position'),
         required=False,
     )
+    enabled = forms.NullBooleanField(
+        label=_('Enabled'),
+        required=False,
+        widget=forms.Select(choices=BOOLEAN_WITH_BLANK_CHOICES),
+    )
 
 
 class DeviceBayFilterForm(DeviceComponentFilterForm):
     model = DeviceBay
     fieldsets = (
         FieldSet('q', 'filter_id', 'tag'),
-        FieldSet('name', 'label', name=_('Attributes')),
+        FieldSet('name', 'label', 'enabled', name=_('Attributes')),
         FieldSet('region_id', 'site_group_id', 'site_id', 'location_id', 'rack_id', name=_('Location')),
         FieldSet(
             'tenant_id', 'device_type_id', 'device_role_id', 'device_id', 'device_status', 'virtual_chassis_id',
@@ -1910,6 +1920,11 @@ class DeviceBayFilterForm(DeviceComponentFilterForm):
         ),
         FieldSet('owner_group_id', 'owner_id', name=_('Ownership')),
     )
+    enabled = forms.NullBooleanField(
+        label=_('Enabled'),
+        required=False,
+        widget=forms.Select(choices=BOOLEAN_WITH_BLANK_CHOICES),
+    )
     tag = TagFilterField(model)
 
 
@@ -1917,9 +1932,14 @@ class DeviceBayTemplateFilterForm(DeviceComponentTemplateFilterForm):
     model = DeviceBayTemplate
     fieldsets = (
         FieldSet('q', 'filter_id', 'tag'),
-        FieldSet('name', 'label', name=_('Attributes')),
+        FieldSet('name', 'label', 'enabled', name=_('Attributes')),
         FieldSet('device_type_id', name=_('Device')),
     )
+    enabled = forms.NullBooleanField(
+        label=_('Enabled'),
+        required=False,
+        widget=forms.Select(choices=BOOLEAN_WITH_BLANK_CHOICES),
+    )
 
 
 class InventoryItemFilterForm(DeviceComponentFilterForm):

netbox/dcim/forms/model_forms.py

@@ -777,7 +777,7 @@ class ModuleForm(ModuleCommonForm, PrimaryModelForm):
             'device_id': '$device',
         },
         context={
-            'disabled': 'installed_module',
+            'disabled': '_occupied',
         },
     )
     module_type = DynamicModelChoiceField(
@@ -1233,26 +1233,26 @@ class ModuleBayTemplateForm(ModularComponentTemplateForm):
                 FieldSet('device_type', name=_('Device Type')),
                 FieldSet('module_type', name=_('Module Type')),
             ),
-            'name', 'label', 'position', 'description',
+            'name', 'label', 'position', 'enabled', 'description',
         ),
     )
 
     class Meta:
         model = ModuleBayTemplate
         fields = [
-            'device_type', 'module_type', 'name', 'label', 'position', 'description',
+            'device_type', 'module_type', 'name', 'label', 'position', 'enabled', 'description',
         ]
 
 
 class DeviceBayTemplateForm(ComponentTemplateForm):
     fieldsets = (
-        FieldSet('device_type', 'name', 'label', 'description'),
+        FieldSet('device_type', 'name', 'label', 'enabled', 'description'),
     )
 
     class Meta:
         model = DeviceBayTemplate
         fields = [
-            'device_type', 'name', 'label', 'description',
+            'device_type', 'name', 'label', 'enabled', 'description',
         ]
 
 
@@ -1698,25 +1698,25 @@ class RearPortForm(ModularDeviceComponentForm):
 
 class ModuleBayForm(ModularDeviceComponentForm):
     fieldsets = (
-        FieldSet('device', 'module', 'name', 'label', 'position', 'description', 'tags',),
+        FieldSet('device', 'module', 'name', 'label', 'position', 'enabled', 'description', 'tags',),
     )
 
     class Meta:
         model = ModuleBay
         fields = [
-            'device', 'module', 'name', 'label', 'position', 'description', 'owner', 'tags',
+            'device', 'module', 'name', 'label', 'position', 'enabled', 'description', 'owner', 'tags',
         ]
 
 
 class DeviceBayForm(DeviceComponentForm):
     fieldsets = (
-        FieldSet('device', 'name', 'label', 'description', 'tags',),
+        FieldSet('device', 'name', 'label', 'enabled', 'description', 'tags',),
     )
 
     class Meta:
         model = DeviceBay
         fields = [
-            'device', 'name', 'label', 'description', 'owner', 'tags',
+            'device', 'name', 'label', 'enabled', 'description', 'owner', 'tags',
         ]
 
 

netbox/dcim/graphql/filters.py

@@ -318,6 +318,7 @@ class DeviceFilter(
 
 @strawberry_django.filter_type(models.DeviceBay, lookups=True)
 class DeviceBayFilter(ComponentModelFilterMixin, NetBoxModelFilter):
+    enabled: FilterLookup[bool] | None = strawberry_django.filter_field()
     installed_device: Annotated['DeviceFilter', strawberry.lazy('dcim.graphql.filters')] | None = (
         strawberry_django.filter_field()
     )
@@ -326,7 +327,7 @@ class DeviceBayFilter(ComponentModelFilterMixin, NetBoxModelFilter):
 
 @strawberry_django.filter_type(models.DeviceBayTemplate, lookups=True)
 class DeviceBayTemplateFilter(ComponentTemplateFilterMixin, ChangeLoggedModelFilter):
-    pass
+    enabled: FilterLookup[bool] | None = strawberry_django.filter_field()
 
 
 @strawberry_django.filter_type(models.InventoryItemTemplate, lookups=True)
@@ -742,11 +743,13 @@ class ModuleBayFilter(ModularComponentFilterMixin, NetBoxModelFilter):
     )
     parent_id: ID | None = strawberry_django.filter_field()
     position: StrFilterLookup[str] | None = strawberry_django.filter_field()
+    enabled: FilterLookup[bool] | None = strawberry_django.filter_field()
 
 
 @strawberry_django.filter_type(models.ModuleBayTemplate, lookups=True)
 class ModuleBayTemplateFilter(ModularComponentTemplateFilterMixin, ChangeLoggedModelFilter):
     position: StrFilterLookup[str] | None = strawberry_django.filter_field()
+    enabled: FilterLookup[bool] | None = strawberry_django.filter_field()
 
 
 @strawberry_django.filter_type(models.ModuleTypeProfile, lookups=True)

netbox/dcim/migrations/0229_devicebay_modulebay_enabled.py

@@ -0,0 +1,30 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('dcim', '0228_cable_bundle'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='devicebay',
+            name='enabled',
+            field=models.BooleanField(default=True),
+        ),
+        migrations.AddField(
+            model_name='devicebaytemplate',
+            name='enabled',
+            field=models.BooleanField(default=True),
+        ),
+        migrations.AddField(
+            model_name='modulebay',
+            name='enabled',
+            field=models.BooleanField(default=True),
+        ),
+        migrations.AddField(
+            model_name='modulebaytemplate',
+            name='enabled',
+            field=models.BooleanField(default=True),
+        ),
+    ]

netbox/dcim/models/device_component_templates.py

@@ -722,6 +722,10 @@ class ModuleBayTemplate(ModularComponentTemplateModel):
         blank=True,
         help_text=_('Identifier to reference when renaming installed components')
     )
+    enabled = models.BooleanField(
+        verbose_name=_('enabled'),
+        default=True,
+    )
 
     component_model = ModuleBay
 
@@ -734,6 +738,7 @@ class ModuleBayTemplate(ModularComponentTemplateModel):
             name=self.resolve_name(kwargs.get('module')),
             label=self.resolve_label(kwargs.get('module')),
             position=self.position,
+            enabled=self.enabled,
             **kwargs
         )
     instantiate.do_not_call_in_templates = True
@@ -743,6 +748,7 @@ class ModuleBayTemplate(ModularComponentTemplateModel):
             'name': self.name,
             'label': self.label,
             'position': self.position,
+            'enabled': self.enabled,
             'description': self.description,
         }
 
@@ -751,6 +757,11 @@ class DeviceBayTemplate(ComponentTemplateModel):
     """
     A template for a DeviceBay to be created for a new parent Device.
     """
+    enabled = models.BooleanField(
+        verbose_name=_('enabled'),
+        default=True,
+    )
+
     component_model = DeviceBay
 
     class Meta(ComponentTemplateModel.Meta):
@@ -761,7 +772,8 @@ class DeviceBayTemplate(ComponentTemplateModel):
         return self.component_model(
             device=device,
             name=self.name,
-            label=self.label
+            label=self.label,
+            enabled=self.enabled,
         )
     instantiate.do_not_call_in_templates = True
 
@@ -777,6 +789,7 @@ class DeviceBayTemplate(ComponentTemplateModel):
         return {
             'name': self.name,
             'label': self.label,
+            'enabled': self.enabled,
             'description': self.description,
         }
 

netbox/dcim/models/device_components.py

@@ -1257,10 +1257,14 @@ class ModuleBay(ModularComponentModel, TrackingModelMixin, MPTTModel):
         blank=True,
         help_text=_('Identifier to reference when renaming installed components')
     )
+    enabled = models.BooleanField(
+        verbose_name=_('enabled'),
+        default=True,
+    )
 
     objects = TreeManager()
 
-    clone_fields = ('device',)
+    clone_fields = ('device', 'enabled')
 
     class Meta(ModularComponentModel.Meta):
         # Empty tuple triggers Django migration detection for MPTT indexes
@@ -1299,6 +1303,13 @@ class ModuleBay(ModularComponentModel, TrackingModelMixin, MPTTModel):
             self.parent = None
         super().save(*args, **kwargs)
 
+    @property
+    def _occupied(self):
+        """
+        Indicates whether the module bay is occupied by a module.
+        """
+        return bool(not self.enabled or hasattr(self, 'installed_module'))
+
 
 class DeviceBay(ComponentModel, TrackingModelMixin):
     """
@@ -1311,8 +1322,12 @@ class DeviceBay(ComponentModel, TrackingModelMixin):
         blank=True,
         null=True
     )
+    enabled = models.BooleanField(
+        verbose_name=_('enabled'),
+        default=True,
+    )
 
-    clone_fields = ('device',)
+    clone_fields = ('device', 'enabled')
 
     class Meta(ComponentModel.Meta):
         verbose_name = _('device bay')
@@ -1327,6 +1342,16 @@ class DeviceBay(ComponentModel, TrackingModelMixin):
                 device_type=self.device.device_type
             ))
 
+        # Prevent installing a device into a disabled bay
+        if self.installed_device and not self.enabled:
+            current_installed_device_id = (
+                DeviceBay.objects.filter(pk=self.pk).values_list('installed_device_id', flat=True).first()
+            )
+            if self.pk is None or current_installed_device_id != self.installed_device_id:
+                raise ValidationError({
+                    'installed_device': _("Cannot install a device in a disabled device bay.")
+                })
+
         # Cannot install a device into itself, obviously
         if self.installed_device and getattr(self, 'device', None) == self.installed_device:
             raise ValidationError(_("Cannot install a device into itself."))
@@ -1341,6 +1366,13 @@ class DeviceBay(ComponentModel, TrackingModelMixin):
                     ).format(bay=current_bay)
                 })
 
+    @property
+    def _occupied(self):
+        """
+        Indicates whether the device bay is occupied by a child device.
+        """
+        return bool(not self.enabled or self.installed_device_id)
+
 
 #
 # Inventory items

netbox/dcim/models/modules.py

@@ -258,6 +258,14 @@ class Module(TrackingModelMixin, PrimaryModel, ConfigContextModel):
                 )
             )
 
+        # Prevent module from being installed in a disabled bay
+        if hasattr(self, 'module_bay') and self.module_bay and not self.module_bay.enabled:
+            current_module_bay_id = Module.objects.filter(pk=self.pk).values_list('module_bay_id', flat=True).first()
+            if self.pk is None or current_module_bay_id != self.module_bay_id:
+                raise ValidationError({
+                    'module_bay': _("Cannot install a module in a disabled module bay.")
+                })
+
         # Check for recursion
         module = self
         module_bays = []

netbox/dcim/tables/devices.py

@@ -888,6 +888,9 @@ class DeviceBayTable(DeviceComponentTable):
             'args': [Accessor('device_id')],
         }
     )
+    enabled = columns.BooleanColumn(
+        verbose_name=_('Enabled'),
+    )
     status = tables.TemplateColumn(
         verbose_name=_('Status'),
         template_code=DEVICEBAY_STATUS,
@@ -925,12 +928,12 @@ class DeviceBayTable(DeviceComponentTable):
     class Meta(DeviceComponentTable.Meta):
         model = models.DeviceBay
         fields = (
-            'pk', 'id', 'name', 'device', 'label', 'status', 'description', 'installed_device', 'installed_role',
-            'installed_device_type', 'installed_description', 'installed_serial', 'installed_asset_tag', 'tags',
-            'created', 'last_updated',
+            'pk', 'id', 'name', 'device', 'label', 'enabled', 'status', 'description', 'installed_device',
+            'installed_role', 'installed_device_type', 'installed_description', 'installed_serial',
+            'installed_asset_tag', 'tags', 'created', 'last_updated',
         )
 
-        default_columns = ('pk', 'name', 'device', 'label', 'status', 'installed_device', 'description')
+        default_columns = ('pk', 'name', 'device', 'label', 'enabled', 'status', 'installed_device', 'description')
 
 
 class DeviceDeviceBayTable(DeviceBayTable):
@@ -940,6 +943,9 @@ class DeviceDeviceBayTable(DeviceBayTable):
                       '"></i> <a href="{{ record.get_absolute_url }}">{{ value }}</a>',
         attrs={'td': {'class': 'text-nowrap'}}
     )
+    enabled = columns.BooleanColumn(
+        verbose_name=_('Enabled'),
+    )
     actions = columns.ActionsColumn(
         extra_buttons=DEVICEBAY_BUTTONS
     )
@@ -947,9 +953,9 @@ class DeviceDeviceBayTable(DeviceBayTable):
     class Meta(DeviceComponentTable.Meta):
         model = models.DeviceBay
         fields = (
-            'pk', 'id', 'name', 'label', 'status', 'installed_device', 'description', 'tags', 'actions',
+            'pk', 'id', 'name', 'label', 'enabled', 'status', 'installed_device', 'description', 'tags', 'actions',
         )
-        default_columns = ('pk', 'name', 'label', 'status', 'installed_device', 'description')
+        default_columns = ('pk', 'name', 'label', 'enabled', 'status', 'installed_device', 'description')
 
 
 class ModuleBayTable(ModularDeviceComponentTable):
@@ -960,6 +966,9 @@ class ModuleBayTable(ModularDeviceComponentTable):
             'args': [Accessor('device_id')],
         }
     )
+    enabled = columns.BooleanColumn(
+        verbose_name=_('Enabled'),
+    )
     parent = tables.Column(
         linkify=True,
         verbose_name=_('Parent'),
@@ -988,11 +997,11 @@ class ModuleBayTable(ModularDeviceComponentTable):
     class Meta(ModularDeviceComponentTable.Meta):
         model = models.ModuleBay
         fields = (
-            'pk', 'id', 'name', 'device', 'parent', 'label', 'position', 'installed_module', 'module_status',
+            'pk', 'id', 'name', 'device', 'enabled', 'parent', 'label', 'position', 'installed_module', 'module_status',
             'module_serial', 'module_asset_tag', 'description', 'tags',
         )
         default_columns = (
-            'pk', 'name', 'device', 'parent', 'label', 'installed_module', 'module_status', 'description',
+            'pk', 'name', 'device', 'enabled', 'parent', 'label', 'installed_module', 'module_status', 'description',
         )
 
     def render_parent_bay(self, value):
@@ -1007,6 +1016,9 @@ class DeviceModuleBayTable(ModuleBayTable):
         verbose_name=_('Name'),
         linkify=True,
     )
+    enabled = columns.BooleanColumn(
+        verbose_name=_('Enabled'),
+    )
     actions = columns.ActionsColumn(
         extra_buttons=MODULEBAY_BUTTONS
     )
@@ -1014,10 +1026,10 @@ class DeviceModuleBayTable(ModuleBayTable):
     class Meta(ModuleBayTable.Meta):
         model = models.ModuleBay
         fields = (
-            'pk', 'id', 'parent', 'name', 'label', 'position', 'installed_module', 'module_status', 'module_serial',
-            'module_asset_tag', 'description', 'tags', 'actions',
+            'pk', 'id', 'parent', 'name', 'label', 'enabled', 'position', 'installed_module', 'module_status',
+            'module_serial', 'module_asset_tag', 'description', 'tags', 'actions',
         )
-        default_columns = ('pk', 'name', 'label', 'installed_module', 'module_status', 'description')
+        default_columns = ('pk', 'name', 'label', 'enabled', 'installed_module', 'module_status', 'description')
 
 
 class InventoryItemTable(DeviceComponentTable):

netbox/dcim/tables/devicetypes.py

@@ -289,24 +289,30 @@ class RearPortTemplateTable(ComponentTemplateTable):
 
 
 class ModuleBayTemplateTable(ComponentTemplateTable):
+    enabled = columns.BooleanColumn(
+        verbose_name=_('Enabled'),
+    )
     actions = columns.ActionsColumn(
         actions=('edit', 'delete')
     )
 
     class Meta(ComponentTemplateTable.Meta):
         model = models.ModuleBayTemplate
-        fields = ('pk', 'name', 'label', 'position', 'description', 'actions')
+        fields = ('pk', 'name', 'label', 'position', 'enabled', 'description', 'actions')
         empty_text = "None"
 
 
 class DeviceBayTemplateTable(ComponentTemplateTable):
+    enabled = columns.BooleanColumn(
+        verbose_name=_('Enabled'),
+    )
     actions = columns.ActionsColumn(
         actions=('edit', 'delete')
     )
 
     class Meta(ComponentTemplateTable.Meta):
         model = models.DeviceBayTemplate
-        fields = ('pk', 'name', 'label', 'description', 'actions')
+        fields = ('pk', 'name', 'label', 'enabled', 'description', 'actions')
         empty_text = "None"
 
 

netbox/dcim/tables/template_code.py

@@ -565,7 +565,7 @@ DEVICEBAY_BUTTONS = """
         <a href="{% url 'dcim:devicebay_depopulate' pk=record.pk %}?return_url={% url 'dcim:device_devicebays' pk=object.pk %}" class="btn btn-danger btn-sm">
             <i class="mdi mdi-server-minus" aria-hidden="true" title="Remove device"></i>
         </a>
-    {% else %}
+    {% elif record.enabled %}
         <a href="{% url 'dcim:devicebay_populate' pk=record.pk %}?return_url={% url 'dcim:device_devicebays' pk=object.pk %}" class="btn btn-success btn-sm">
             <i class="mdi mdi-server-plus" aria-hidden="true" title="Install device"></i>
         </a>
@@ -579,7 +579,7 @@ MODULEBAY_BUTTONS = """
         <a href="{% url 'dcim:module_delete' pk=record.installed_module.pk %}?return_url={% url 'dcim:device_modulebays' pk=object.pk %}" class="btn btn-danger btn-sm">
             <i class="mdi mdi-server-minus" aria-hidden="true" title="Remove module"></i>
         </a>
-    {% else %}
+    {% elif record.enabled %}
         <a href="{% url 'dcim:module_add' %}?device={{ record.device_id }}&module_bay={{ record.pk }}&manufacturer={{ object.device_type.manufacturer_id }}&return_url={% url 'dcim:device_modulebays' pk=object.pk %}" class="btn btn-success btn-sm">
             <i class="mdi mdi-server-plus" aria-hidden="true" title="Install module"></i>
         </a>

netbox/dcim/tests/test_api.py

@@ -1226,7 +1226,7 @@ class RearPortTemplateTest(APIViewTestCases.APIViewTestCase):
 
 class ModuleBayTemplateTest(APIViewTestCases.APIViewTestCase):
     model = ModuleBayTemplate
-    brief_fields = ['description', 'display', 'id', 'name', 'url']
+    brief_fields = ['description', 'display', 'enabled', 'id', 'name', 'url']
     bulk_update_data = {
         'description': 'New description',
     }
@@ -1243,9 +1243,9 @@ class ModuleBayTemplateTest(APIViewTestCases.APIViewTestCase):
         )
 
         module_bay_templates = (
-            ModuleBayTemplate(device_type=devicetype, name='Module Bay Template 1'),
-            ModuleBayTemplate(device_type=devicetype, name='Module Bay Template 2'),
-            ModuleBayTemplate(device_type=devicetype, name='Module Bay Template 3'),
+            ModuleBayTemplate(device_type=devicetype, name='Module Bay Template 1', enabled=True),
+            ModuleBayTemplate(device_type=devicetype, name='Module Bay Template 2', enabled=False),
+            ModuleBayTemplate(device_type=devicetype, name='Module Bay Template 3', enabled=True),
         )
         ModuleBayTemplate.objects.bulk_create(module_bay_templates)
 
@@ -1253,6 +1253,7 @@ class ModuleBayTemplateTest(APIViewTestCases.APIViewTestCase):
             {
                 'device_type': devicetype.pk,
                 'name': 'Module Bay Template 4',
+                'enabled': False,
             },
             {
                 'device_type': devicetype.pk,
@@ -1267,7 +1268,7 @@ class ModuleBayTemplateTest(APIViewTestCases.APIViewTestCase):
 
 class DeviceBayTemplateTest(APIViewTestCases.APIViewTestCase):
     model = DeviceBayTemplate
-    brief_fields = ['description', 'display', 'id', 'name', 'url']
+    brief_fields = ['description', 'display', 'enabled', 'id', 'name', 'url']
     bulk_update_data = {
         'description': 'New description',
     }
@@ -1284,9 +1285,9 @@ class DeviceBayTemplateTest(APIViewTestCases.APIViewTestCase):
         )
 
         device_bay_templates = (
-            DeviceBayTemplate(device_type=devicetype, name='Device Bay Template 1'),
-            DeviceBayTemplate(device_type=devicetype, name='Device Bay Template 2'),
-            DeviceBayTemplate(device_type=devicetype, name='Device Bay Template 3'),
+            DeviceBayTemplate(device_type=devicetype, name='Device Bay Template 1', enabled=True),
+            DeviceBayTemplate(device_type=devicetype, name='Device Bay Template 2', enabled=False),
+            DeviceBayTemplate(device_type=devicetype, name='Device Bay Template 3', enabled=True),
         )
         DeviceBayTemplate.objects.bulk_create(device_bay_templates)
 
@@ -1294,6 +1295,7 @@ class DeviceBayTemplateTest(APIViewTestCases.APIViewTestCase):
             {
                 'device_type': devicetype.pk,
                 'name': 'Device Bay Template 4',
+                'enabled': False,
             },
             {
                 'device_type': devicetype.pk,
@@ -2594,7 +2596,7 @@ class RearPortTest(APIViewTestCases.APIViewTestCase):
 
 class ModuleBayTest(APIViewTestCases.APIViewTestCase):
     model = ModuleBay
-    brief_fields = ['description', 'display', 'id', 'installed_module', 'name', 'url']
+    brief_fields = ['_occupied', 'description', 'display', 'enabled', 'id', 'installed_module', 'name', 'url']
     bulk_update_data = {
         'description': 'New description',
     }
@@ -2610,9 +2612,9 @@ class ModuleBayTest(APIViewTestCases.APIViewTestCase):
         device = Device.objects.create(device_type=device_type, role=role, name='Device 1', site=site)
 
         module_bays = (
-            ModuleBay(device=device, name='Device Bay 1'),
-            ModuleBay(device=device, name='Device Bay 2'),
-            ModuleBay(device=device, name='Device Bay 3'),
+            ModuleBay(device=device, name='Device Bay 1', enabled=True),
+            ModuleBay(device=device, name='Device Bay 2', enabled=False),
+            ModuleBay(device=device, name='Device Bay 3', enabled=True),
         )
         for module_bay in module_bays:
             module_bay.save()
@@ -2621,6 +2623,7 @@ class ModuleBayTest(APIViewTestCases.APIViewTestCase):
             {
                 'device': device.pk,
                 'name': 'Device Bay 4',
+                'enabled': False,
             },
             {
                 'device': device.pk,
@@ -2635,7 +2638,7 @@ class ModuleBayTest(APIViewTestCases.APIViewTestCase):
 
 class DeviceBayTest(APIViewTestCases.APIViewTestCase):
     model = DeviceBay
-    brief_fields = ['description', 'device', 'display', 'id', 'name', 'url']
+    brief_fields = ['_occupied', 'description', 'device', 'display', 'enabled', 'id', 'name', 'url']
     bulk_update_data = {
         'description': 'New description',
     }
@@ -2672,9 +2675,9 @@ class DeviceBayTest(APIViewTestCases.APIViewTestCase):
         Device.objects.bulk_create(devices)
 
         device_bays = (
-            DeviceBay(device=devices[0], name='Device Bay 1'),
-            DeviceBay(device=devices[0], name='Device Bay 2'),
-            DeviceBay(device=devices[0], name='Device Bay 3'),
+            DeviceBay(device=devices[0], name='Device Bay 1', enabled=True),
+            DeviceBay(device=devices[0], name='Device Bay 2', enabled=False),
+            DeviceBay(device=devices[0], name='Device Bay 3', enabled=True),
         )
         DeviceBay.objects.bulk_create(device_bays)
 

netbox/dcim/tests/test_filtersets.py

@@ -2247,13 +2247,21 @@ class ModuleBayTemplateTestCase(TestCase, DeviceComponentTemplateFilterSetTests,
         ModuleBayTemplate.objects.bulk_create(
             (
                 ModuleBayTemplate(
-                    device_type=device_types[0], name='Module Bay 1', description='foobar1'
+                    device_type=device_types[0], name='Module Bay 1', enabled=True, description='foobar1'
                 ),
                 ModuleBayTemplate(
-                    device_type=device_types[1], name='Module Bay 2', description='foobar2', module_type=module_types[0]
+                    device_type=device_types[1],
+                    name='Module Bay 2',
+                    enabled=False,
+                    description='foobar2',
+                    module_type=module_types[0],
                 ),
                 ModuleBayTemplate(
-                    device_type=device_types[2], name='Module Bay 3', description='foobar3', module_type=module_types[1]
+                    device_type=device_types[2],
+                    name='Module Bay 3',
+                    enabled=True,
+                    description='foobar3',
+                    module_type=module_types[1],
                 ),
             )
         )
@@ -2262,6 +2270,12 @@ class ModuleBayTemplateTestCase(TestCase, DeviceComponentTemplateFilterSetTests,
         params = {'name': ['Module Bay 1', 'Module Bay 2']}
         self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
 
+    def test_enabled(self):
+        params = {'enabled': True}
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
+        params = {'enabled': False}
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 1)
+
     def test_module_type(self):
         module_types = ModuleType.objects.all()[:2]
         params = {'module_type_id': [module_types[0].pk, module_types[1].pk]}
@@ -2284,16 +2298,30 @@ class DeviceBayTemplateTestCase(TestCase, DeviceComponentTemplateFilterSetTests,
         )
         DeviceType.objects.bulk_create(device_types)
 
-        DeviceBayTemplate.objects.bulk_create((
-            DeviceBayTemplate(device_type=device_types[0], name='Device Bay 1', description='foobar1'),
-            DeviceBayTemplate(device_type=device_types[1], name='Device Bay 2', description='foobar2'),
-            DeviceBayTemplate(device_type=device_types[2], name='Device Bay 3', description='foobar3'),
-        ))
+        DeviceBayTemplate.objects.bulk_create(
+            (
+                DeviceBayTemplate(
+                    device_type=device_types[0], name='Device Bay 1', enabled=True, description='foobar1'
+                ),
+                DeviceBayTemplate(
+                    device_type=device_types[1], name='Device Bay 2', enabled=False, description='foobar2'
+                ),
+                DeviceBayTemplate(
+                    device_type=device_types[2], name='Device Bay 3', enabled=True, description='foobar3'
+                ),
+            )
+        )
 
     def test_name(self):
         params = {'name': ['Device Bay 1', 'Device Bay 2']}
         self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
 
+    def test_enabled(self):
+        params = {'enabled': True}
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
+        params = {'enabled': False}
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 1)
+
 
 class InventoryItemTemplateTestCase(TestCase, DeviceComponentTemplateFilterSetTests, ChangeLoggedFilterSetTests):
     queryset = InventoryItemTemplate.objects.all()
@@ -5778,11 +5806,11 @@ class ModuleBayTestCase(TestCase, DeviceComponentFilterSetTests, ChangeLoggedFil
         Device.objects.bulk_create(devices)
 
         module_bays = (
-            ModuleBay(device=devices[0], name='Module Bay 1', label='A', description='First'),
-            ModuleBay(device=devices[1], name='Module Bay 2', label='B', description='Second'),
-            ModuleBay(device=devices[2], name='Module Bay 3', label='C', description='Third'),
-            ModuleBay(device=devices[2], name='Module Bay 4', label='D', description='Fourth'),
-            ModuleBay(device=devices[2], name='Module Bay 5', label='E', description='Fifth'),
+            ModuleBay(device=devices[0], name='Module Bay 1', label='A', enabled=True, description='First'),
+            ModuleBay(device=devices[1], name='Module Bay 2', label='B', enabled=False, description='Second'),
+            ModuleBay(device=devices[2], name='Module Bay 3', label='C', enabled=True, description='Third'),
+            ModuleBay(device=devices[2], name='Module Bay 4', label='D', enabled=False, description='Fourth'),
+            ModuleBay(device=devices[2], name='Module Bay 5', label='E', enabled=True, description='Fifth'),
         )
         for module_bay in module_bays:
             module_bay.save()
@@ -5806,6 +5834,12 @@ class ModuleBayTestCase(TestCase, DeviceComponentFilterSetTests, ChangeLoggedFil
         params = {'label': ['A', 'B']}
         self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
 
+    def test_enabled(self):
+        params = {'enabled': True}
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 3)
+        params = {'enabled': False}
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
+
     def test_description(self):
         params = {'description': ['First', 'Second']}
         self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
@@ -5965,6 +5999,7 @@ class DeviceBayTestCase(TestCase, DeviceComponentFilterSetTests, ChangeLoggedFil
                 device=devices[0],
                 name='Device Bay 1',
                 label='A',
+                enabled=True,
                 description='First',
                 _site=devices[0].site,
                 _location=devices[0].location,
@@ -5974,6 +6009,7 @@ class DeviceBayTestCase(TestCase, DeviceComponentFilterSetTests, ChangeLoggedFil
                 device=devices[1],
                 name='Device Bay 2',
                 label='B',
+                enabled=False,
                 description='Second',
                 _site=devices[1].site,
                 _location=devices[1].location,
@@ -5983,6 +6019,7 @@ class DeviceBayTestCase(TestCase, DeviceComponentFilterSetTests, ChangeLoggedFil
                 device=devices[2],
                 name='Device Bay 3',
                 label='C',
+                enabled=True,
                 description='Third',
                 _site=devices[2].site,
                 _location=devices[2].location,
@@ -5999,6 +6036,12 @@ class DeviceBayTestCase(TestCase, DeviceComponentFilterSetTests, ChangeLoggedFil
         params = {'label': ['A', 'B']}
         self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
 
+    def test_enabled(self):
+        params = {'enabled': True}
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
+        params = {'enabled': False}
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 1)
+
     def test_description(self):
         params = {'description': ['First', 'Second']}
         self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)

netbox/dcim/tests/test_models.py

@@ -712,6 +712,112 @@ class DeviceTestCase(TestCase):
             ).full_clean()
 
 
+class DeviceBayTestCase(TestCase):
+
+    @classmethod
+    def setUpTestData(cls):
+        site = Site.objects.create(name='Test Site 1', slug='test-site-1')
+        manufacturer = Manufacturer.objects.create(name='Test Manufacturer 1', slug='test-manufacturer-1')
+
+        # Parent device type must support device bays (is_parent_device=True)
+        parent_device_type = DeviceType.objects.create(
+            manufacturer=manufacturer,
+            model='Parent Device Type',
+            slug='parent-device-type',
+            subdevice_role=SubdeviceRoleChoices.ROLE_PARENT
+        )
+        # Child device type for installation
+        child_device_type = DeviceType.objects.create(
+            manufacturer=manufacturer,
+            model='Child Device Type',
+            slug='child-device-type',
+            u_height=0,
+            subdevice_role=SubdeviceRoleChoices.ROLE_CHILD
+        )
+        device_role = DeviceRole.objects.create(name='Test Role 1', slug='test-role-1')
+
+        cls.parent_device = Device.objects.create(
+            name='Parent Device',
+            device_type=parent_device_type,
+            role=device_role,
+            site=site
+        )
+        cls.child_device = Device.objects.create(
+            name='Child Device',
+            device_type=child_device_type,
+            role=device_role,
+            site=site
+        )
+        cls.child_device_2 = Device.objects.create(
+            name='Child Device 2',
+            device_type=child_device_type,
+            role=device_role,
+            site=site
+        )
+
+    def test_cannot_install_device_in_disabled_bay(self):
+        """
+        Test that a device cannot be installed into a disabled DeviceBay.
+        """
+        # Create a disabled device bay with a device being installed
+        device_bay = DeviceBay(
+            device=self.parent_device,
+            name='Disabled Bay',
+            enabled=False,
+            installed_device=self.child_device
+        )
+
+        with self.assertRaises(ValidationError) as cm:
+            device_bay.clean()
+
+        self.assertIn('installed_device', cm.exception.message_dict)
+        self.assertIn('disabled device bay', str(cm.exception.message_dict['installed_device']))
+
+    def test_can_disable_bay_with_existing_device(self):
+        """
+        Test that disabling a bay that already has a device installed does NOT raise an error
+        (same installed_device_id).
+        """
+        # First, create an enabled device bay with a device installed
+        device_bay = DeviceBay.objects.create(
+            device=self.parent_device,
+            name='Bay To Disable',
+            enabled=True,
+            installed_device=self.child_device
+        )
+
+        # Now disable the bay while keeping the same installed device
+        device_bay.enabled = False
+        # This should NOT raise a ValidationError
+        device_bay.clean()
+        device_bay.save()
+
+        device_bay.refresh_from_db()
+        self.assertFalse(device_bay.enabled)
+        self.assertEqual(device_bay.installed_device, self.child_device)
+
+    def test_cannot_change_installed_device_in_disabled_bay(self):
+        """
+        Test that changing the installed device in a disabled bay raises a ValidationError.
+        """
+        # Create an enabled device bay with a device installed
+        device_bay = DeviceBay.objects.create(
+            device=self.parent_device,
+            name='Bay With Device',
+            enabled=True,
+            installed_device=self.child_device
+        )
+
+        # Disable the bay and try to change the installed device
+        device_bay.enabled = False
+        device_bay.installed_device = self.child_device_2
+
+        with self.assertRaises(ValidationError) as cm:
+            device_bay.clean()
+
+        self.assertIn('installed_device', cm.exception.message_dict)
+
+
 class ModuleBayTestCase(TestCase):
 
     @classmethod
@@ -1011,6 +1117,25 @@ class ModuleBayTestCase(TestCase):
         self.assertEqual(RearPort.objects.filter(module=module).count(), 1)
         self.assertEqual(PortMapping.objects.filter(front_port__module=module).count(), 0)
 
+    def test_cannot_install_module_in_disabled_bay(self):
+        """
+        Test that a Module cannot be installed into a disabled ModuleBay.
+        """
+        device = Device.objects.first()
+        manufacturer = Manufacturer.objects.first()
+        module_type = ModuleType.objects.create(manufacturer=manufacturer, model='Test Module Type Disabled')
+
+        # Create a disabled module bay
+        disabled_bay = ModuleBay.objects.create(device=device, name='Disabled Bay', enabled=False)
+
+        # Attempt to install a module into the disabled bay
+        module = Module(device=device, module_bay=disabled_bay, module_type=module_type)
+        with self.assertRaises(ValidationError) as cm:
+            module.clean()
+
+        self.assertIn('module_bay', cm.exception.message_dict)
+        self.assertIn('disabled module bay', str(cm.exception.message_dict['module_bay']))
+
 
 class CableTestCase(TestCase):