feat: enforce maximum suffix limit for users

Added validation in both the model and view to enforce a limit on the number of suffixes a user can create based on their maximum suffixes property. This ensures that users cannot exceed their allowed number of suffixes and maintains system integrity.

freedoi/resolver/models.py

@@ -61,6 +61,13 @@ class Suffix(models.Model):
             if old.prefix != self.prefix:
                 raise ValueError("Prefix cannot be changed")
 
+        else:
+            if (
+                Suffix.objects.filter(prefix=self.prefix).count()
+                >= self.owner.maximum_suffixes
+            ):
+                raise ValueError("Maximum number of suffixes reached")
+
         super().save(*args, **kwargs)
 
 

freedoi/resolver/views.py

@@ -152,7 +152,7 @@ class SuffixCreateView(LoginRequiredMixin, CreateView):
     success_url = reverse_lazy("suffix_list")
 
     def dispatch(self, request, *args, **kwargs):
-        if request.user.suffix_set.count() >= request.user.suffix_limit:
+        if request.user.suffix_set.count() >= request.user.maximum_suffixes:
             return self.handle_no_permission()
         return super().dispatch(request, *args, **kwargs)