Make publication depend on 'published_at' field

news/managers.py

@@ -1,9 +1,11 @@
 from django.db.models import QuerySet
+from django.utils import timezone
 
 
 class NewsItemQuerySet(QuerySet):
 
     def public(self):
         return self.filter(
-            public=True
+            public=True,
+            published_at__lt=timezone.now()
         )

news/templates/news_detail.html

@@ -3,6 +3,11 @@
 
 {% block content %}
   <div>
+    {% if draft %}
+    <div class="alert alert-danger">
+      <strong>This news item is not yet public.</strong> It will become public at {{ news_item.published_at|date:'Y-m-d H:i' }}.
+    </div>
+    {% endif %}
     <h3>{{ news_item.title }} <small>{{ news_item.published_at|date:"Y-m-d" }}</small></h3>
   </div>
   {{ news_item.content|commonmark }}

news/views.py

@@ -1,4 +1,5 @@
 from django.views.generic import ListView, DetailView
+from django.utils import timezone
 from . import models
 
 
@@ -14,3 +15,11 @@ class NewsDetail(DetailView):
     template_name = 'news_detail.html'
     context_object_name = 'news_item'
 
+    def get_context_data(self, **kwargs):
+        context = super(NewsDetail, self).get_context_data(**kwargs)
+        news_item = self.get_object()
+        context['draft'] = False
+        if news_item.public and news_item.published_at > timezone.now():
+            context['draft'] = True
+        return context
+