use nested admin for simpler plan admin

hub/services/admin.py

@@ -14,6 +14,42 @@ from .models import (
     WebsiteFaq,
 )
 
+import nested_admin
+
+
+class PlanInline(nested_admin.NestedStackedInline):
+    model = Plan
+    extra = 1
+    fieldsets = (
+        (None, {"fields": ("name", "description", "pricing", "plan_description")}),
+    )
+
+
+class ExternalLinkOfferingInline(admin.TabularInline):
+    model = ExternalLinkOffering
+    extra = 1
+    fields = ("description", "url", "order")
+    ordering = ("order", "description")
+
+
+class OfferingInline(nested_admin.NestedStackedInline):
+    model = ServiceOffering
+    extra = 1
+    fieldsets = (
+        (
+            None,
+            {
+                "fields": (
+                    "description",
+                    "service",
+                    "cloud_provider",
+                    "offer_description",
+                )
+            },
+        ),
+    )
+    inlines = [PlanInline]
+
 
 @admin.register(ReusableText)
 class ReusableTextAdmin(admin.ModelAdmin):
@@ -31,14 +67,8 @@ class CategoryAdmin(admin.ModelAdmin):
     ordering = ("order", "name")
 
 
-class OfferingInline(admin.StackedInline):
-    model = ServiceOffering
-    extra = 1
-    fieldsets = ((None, {"fields": ("description", "service", "cloud_provider")}),)
-
-
 @admin.register(CloudProvider)
-class CloudProviderAdmin(admin.ModelAdmin):
+class CloudProviderAdmin(nested_admin.NestedModelAdmin):
     list_display = ("name", "slug", "logo_preview")
     search_fields = ("name", "description")
     prepopulated_fields = {"slug": ("name",)}
@@ -90,21 +120,6 @@ class ServiceAdmin(admin.ModelAdmin):
     partner_list.short_description = "Consulting Partners"
 
 
-class PlanInline(admin.StackedInline):
-    model = Plan
-    extra = 1
-    fieldsets = (
-        (None, {"fields": ("name", "description", "pricing", "plan_description")}),
-    )
-
-
-class ExternalLinkOfferingInline(admin.TabularInline):
-    model = ExternalLinkOffering
-    extra = 1
-    fields = ("description", "url", "order")
-    ordering = ("order", "description")
-
-
 @admin.register(ServiceOffering)
 class ServiceOfferingAdmin(admin.ModelAdmin):
     list_display = ("service", "cloud_provider")