Added devices instances column for config templates.

netbox/extras/tables/tables.py

@@ -414,15 +414,20 @@ class ConfigTemplateTable(NetBoxTable):
     tags = columns.TagColumn(
         url_name='extras:configtemplate_list'
     )
+    instance_count = columns.LinkedCountColumn(
+        viewname='dcim:device_list',
+        url_params={'config_template_id': 'pk'},
+        verbose_name=_('Instances')
+    )
 
     class Meta(NetBoxTable.Meta):
         model = ConfigTemplate
         fields = (
             'pk', 'id', 'name', 'description', 'data_source', 'data_file', 'data_synced', 'created', 'last_updated',
-            'tags',
+            'tags', 'instance_count',
         )
         default_columns = (
-            'pk', 'name', 'description', 'is_synced',
+            'pk', 'name', 'description', 'is_synced', 'instance_count'
         )
 
 

netbox/extras/views.py

@@ -13,6 +13,7 @@ from core.choices import JobStatusChoices, ManagedFileRootPathChoices
 from core.forms import ManagedFileForm
 from core.models import Job
 from core.tables import JobTable
+from dcim.models import Device
 from extras.dashboard.forms import DashboardWidgetAddForm, DashboardWidgetForm
 from extras.dashboard.utils import get_widget_class
 from netbox.constants import DEFAULT_ACTION_PERMISSIONS
@@ -624,7 +625,9 @@ class ObjectConfigContextView(generic.ObjectView):
 #
 
 class ConfigTemplateListView(generic.ObjectListView):
-    queryset = ConfigTemplate.objects.all()
+    queryset = ConfigTemplate.objects.annotate(
+        instance_count=count_related(Device, 'config_template')
+    )
     filterset = filtersets.ConfigTemplateFilterSet
     filterset_form = forms.ConfigTemplateFilterForm
     table = tables.ConfigTemplateTable