Cache latest blog post

poetry.lock

@@ -396,6 +396,14 @@ python-versions = ">=3.6"
 [package.dependencies]
 Django = ">=2.2"
 
+[[package]]
+name = "django3-cache-decorator"
+version = "0.5.2"
+description = "Easily add caching to functions within a django project."
+category = "main"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "djangorestframework"
 version = "3.13.1"
@@ -1461,7 +1469,7 @@ testing = ["func-timeout", "jaraco.itertools", "pytest (>=6)", "pytest-black (>=
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.10"
-content-hash = "ebe98ffb0ca3eecc013a5d4ff58665bdbba2806da83d08ccb3acdbf03bda39b0"
+content-hash = "78d386497d4f46ead5da6c395a16ce50d9f9846cb20bf39bf2932bf5db5d4316"
 
 [metadata.files]
 anyascii = [
@@ -1721,6 +1729,10 @@ django-treebeard = [
     {file = "django-treebeard-4.5.1.tar.gz", hash = "sha256:80150017725239702054e5fa64dc66e383dc13ac262c8d47ee5a82cb005969da"},
     {file = "django_treebeard-4.5.1-py3-none-any.whl", hash = "sha256:7c2b1cdb1e9b46d595825186064a1228bc4d00dbbc186db5b0b9412357fba91c"},
 ]
+django3-cache-decorator = [
+    {file = "django3-cache-decorator-0.5.2.tar.gz", hash = "sha256:d41409aa18c5bd1a99d48632373336d9787cb94025807ff3161804044a9f8abe"},
+    {file = "django3_cache_decorator-0.5.2-py3-none-any.whl", hash = "sha256:c8dc082bad6fa0598b5c26b30b15062aff5072ce649202fb82db2b49bfa454b3"},
+]
 djangorestframework = [
     {file = "djangorestframework-3.13.1-py3-none-any.whl", hash = "sha256:24c4bf58ed7e85d1fe4ba250ab2da926d263cd57d64b03e8dcef0ac683f8b1aa"},
     {file = "djangorestframework-3.13.1.tar.gz", hash = "sha256:0c33407ce23acc68eca2a6e46424b008c9c02eceb8cf18581921d0092bc1f2ee"},

pyproject.toml

@@ -34,6 +34,7 @@ wagtail-2fa = "1.6.0"
 django-health-check = "3.17.0"
 wagtail-autocomplete = {git = "https://github.com/wagtail/wagtail-autocomplete", rev = "03f46a0c256989690d0a43fc21fe0f37f9ede765"}
 Wand = "^0.6.10"
+django3-cache-decorator = "^0.5.2"
 
 
 [tool.poetry.group.dev.dependencies]

website/home/models.py

@@ -1,5 +1,8 @@
+from typing import Optional, Tuple
+
 from django.db import models
 from django.http.request import HttpRequest
+from django_cache_decorator import django_cache_decorator
 from wagtail.admin.panels import FieldPanel
 from wagtail.images import get_image_model_string
 from wagtail.images.models import Image
@@ -9,6 +12,20 @@ from website.common.models import BasePage
 from website.contrib.singleton_page.utils import SingletonPageCache
 
 
+@django_cache_decorator(time=21600)
+def get_latest_blog_post() -> Optional[Tuple[str, str]]:
+    from website.blog.models import BlogPostPage
+
+    try:
+        latest_blog_post = (
+            BlogPostPage.objects.live().public().defer_streamfields().latest("date")
+        )
+    except BlogPostPage.DoesNotExist:
+        return None
+
+    return latest_blog_post.title, latest_blog_post.get_url()
+
+
 class HomePage(BasePage, WagtailImageMetadataMixin):
     max_count = 1
 
@@ -38,16 +55,9 @@ class HomePage(BasePage, WagtailImageMetadataMixin):
         return ""
 
     def get_context(self, request: HttpRequest) -> dict:
-        from website.blog.models import BlogPostPage
         from website.search.models import SearchPage
 
         context = super().get_context(request)
-        context["latest_blog_post"] = (
+        context["latest_blog_post"] = get_latest_blog_post()
-            BlogPostPage.objects.live()
-            .public()
-            .defer_streamfields()
-            .order_by("-date")
-            .first()
-        )
         context["search_page_url"] = SingletonPageCache.get_url(SearchPage, request)
         return context

website/home/templates/home/home_page.html

@@ -16,7 +16,7 @@
     {% if latest_blog_post %}
       <div class="box latest">
         <strong>Latest Post</strong>:
-        <a href="{% pageurl latest_blog_post %}">{{ latest_blog_post.title }}</a>
+        <a href="{{ latest_blog_post.1 }}">{{ latest_blog_post.0 }}</a>
         &rarr;
       </div>
     {% endif %}