Fix issues with public tags in templates

website/blog/models.py

@@ -7,6 +7,7 @@ from django.utils import timezone
 from django.utils.functional import cached_property
 from modelcluster.fields import ParentalManyToManyField
 from wagtail.admin.panels import FieldPanel
+from wagtail.models import PageQuerySet
 from wagtail.search import index
 from wagtailautocomplete.edit_handlers import AutocompletePanel
 
@@ -61,6 +62,19 @@ class BlogPostPage(BaseContentPage):
     def tag_list_page_url(self) -> Optional[str]:
         return SingletonPageCache.get_url(BlogPostTagListPage)
 
+    @cached_property
+    def tags_list(self) -> models.QuerySet:
+        """
+        Use this to get a page's tags.
+        """
+        tags = self.tags.order_by("slug")
+
+        # In drafts, `django-modelcluster` doesn't support these filters
+        if isinstance(tags, PageQuerySet):
+            return tags.public().live()
+
+        return tags
+
     @cached_property
     def blog_post_list_page_url(self) -> Optional[str]:
         return SingletonPageCache.get_url(BlogPostListPage)

website/common/templates/common/content-details.html

@@ -20,14 +20,14 @@
     </div>
   {% endif %}
 
-  {% if page.tags.public.live.all %}
+  {% if page.tags_list %}
     <div class="icon-text is-family-code">
       <span class="icon">
         <a href="{{ page.tag_list_page_url }}" title="View all tags">
           <i class="fas fa-lg fa-tags"></i>
         </a>
       </span>
-      {% for tag in page.tags.public.live.all|dictsort:"slug" %}
+      {% for tag in page.tags_list %}
         <span><a title="{{ tag.name }}" href="{% pageurl tag %}">#{{ tag.slug }}</a></span>
       {% endfor %}
     </div>

website/common/views.py

@@ -15,6 +15,7 @@ from wagtail.query import PageQuerySet
 from wagtail_favicon.models import FaviconSettings
 from wagtail_favicon.utils import get_rendition_url
 
+from website.blog.models import BlogPostPage
 from website.common.utils import get_site_title
 from website.contrib.singleton_page.utils import SingletonPageCache
 from website.home.models import HomePage
@@ -126,8 +127,8 @@ class AllPagesFeed(Feed):
         return getattr(item, "summary", None) or item.title
 
     def item_categories(self, item: BasePage) -> Optional[list[str]]:
-        if tags := getattr(item, "tags", None):
-            return tags.public().live().order_by("slug").values_list("slug", flat=True)
+        if isinstance(item, BlogPostPage):
+            return item.tags_list.values_list("slug", flat=True)
         return None
 
     def item_enclosure_url(self, item: BasePage) -> Optional[str]: