fix(spec): enforce read-time budget and re-render invalid comment submissions

apps/comments/views.py

@@ -5,7 +5,7 @@ from django.contrib import messages
 from django.core.cache import cache
 from django.core.exceptions import ValidationError
 from django.http import HttpResponse
-from django.shortcuts import get_object_or_404, redirect
+from django.shortcuts import get_object_or_404, redirect, render
 from django.views import View
 
 from apps.blog.models import ArticlePage
@@ -23,6 +23,12 @@ def client_ip_from_request(request) -> str:
 
 
 class CommentCreateView(View):
+    def _render_article_with_errors(self, request, article, form):
+        context = article.get_context(request)
+        context["page"] = article
+        context["comment_form"] = form
+        return render(request, "blog/article_page.html", context, status=200)
+
     def post(self, request):
         ip = client_ip_from_request(request)
         key = f"comment-rate:{ip}"
@@ -48,11 +54,10 @@ class CommentCreateView(View):
             try:
                 comment.full_clean()
             except ValidationError:
-                messages.error(request, "Reply depth exceeds the allowed limit")
-                return redirect(article.url)
+                form.add_error(None, "Reply depth exceeds the allowed limit")
+                return self._render_article_with_errors(request, article, form)
             comment.save()
             messages.success(request, "Your comment is awaiting moderation")
             return redirect(f"{article.url}?commented=1")
 
-        messages.error(request, "Please correct the form errors")
-        return redirect(article.url)
+        return self._render_article_with_errors(request, article, form)