Defer instance creation to model

src/servala/core/models/service.py

@@ -457,3 +457,12 @@ class ServiceInstance(ServalaModelMixin, models.Model):
     class urls(urlman.Urls):
         base = "{self.organization.urls.instances}{self.name}/"
 
+    @classmethod
+    def create_instance(cls, organization, context, created_by, spec_data):
+        name = spec_data.get("spec.name")
+        return cls.objects.create(
+            name=name,
+            organization=organization,
+            created_by=created_by,
+            context=context,
+        )

src/servala/frontend/views/service.py

@@ -1,7 +1,14 @@
+from django.contrib import messages
+from django.shortcuts import redirect
 from django.utils.functional import cached_property
 from django.views.generic import DetailView, ListView
 
-from servala.core.models import Service, ServiceOffering, ServiceOfferingControlPlane
+from servala.core.models import (
+    Service,
+    ServiceInstance,
+    ServiceOffering,
+    ServiceOfferingControlPlane,
+)
 from servala.frontend.forms.service import ControlPlaneSelectForm, ServiceFilterForm
 from servala.frontend.views.mixins import HtmxViewMixin, OrganizationViewMixin
 
@@ -107,3 +114,28 @@ class ServiceOfferingDetailView(OrganizationViewMixin, HtmxViewMixin, DetailView
         context["selected_plane"] = self.selected_plane
         context["service_form"] = self.get_instance_form()
         return context
+
+    def post(self, request, *args, **kwargs):
+        self.object = self.get_object()
+        context = self.get_context_data(object=self.object)
+
+        if not self.context_object:
+            context["form_error"] = True
+            return self.render_to_response(context)
+
+        form = self.get_instance_form()
+        if form.is_valid():
+            try:
+                service_instance = ServiceInstance.create_instance(
+                    organization=self.organization,
+                    context=self.context_object,
+                    created_by=request.user,
+                    spec_data=form.get_nested_data(),
+                )
+                return redirect(service_instance.urls.base)
+            except Exception as e:
+                messages.error(self.request, str(e))
+
+        # If the form is not valid or if the service creation failed, we render it again
+        context["service_form"] = form
+        return self.render_to_response(context)