Add success message on object creation with link to object

nummi/main/templates/main/base.html

@@ -88,6 +88,11 @@
             {% endspaceless %}
         {% endblock %}
         <main id="main">
+            {% if messages %}
+                <ul>
+                    {% for message in messages %}<li>{{ message }}</li>{% endfor %}
+                </ul>
+            {% endif %}
             {% block body %}{% endblock %}
         </main>
     </body>

nummi/main/views.py

@@ -1,8 +1,10 @@
 from account.models import Account
 from category.models import Category
+from django.contrib import messages
 from django.contrib.auth import views as auth_views
 from django.contrib.auth.mixins import LoginRequiredMixin
 from django.urls import reverse_lazy
+from django.utils.html import format_html
 from django.views.generic import (
     CreateView,
     DeleteView,
@@ -55,7 +57,18 @@ class NummiCreateView(UserMixin, CreateView):
         return super().form_valid(form)
 
     def get_success_url(self):
-        return self.next or super().get_success_url()
+        surl = super().get_success_url()
+        messages.success(
+            self.request,
+            format_html(
+                "<a href='{surl}'>{name}</a> {msg}",
+                surl=surl,
+                name=self.object,
+                msg="was created successfully",
+            ),
+        )
+
+        return self.next or surl
 
 
 class NummiUpdateView(UserMixin, UpdateView):