only show active program_slots at show_detail

program/models.py

@@ -239,6 +239,12 @@ class ProgramSlot(models.Model):
         return self.timeslots.count()
     timeslot_count.description = _("Time slot count")
 
+    def has_active_timeslot(self):
+        start = self.timeslots.all().order_by("start")[0].start
+        end = self.timeslots.all().order_by("-end")[0].end
+        now = datetime.now()
+        return (start < now and end > now)
+
 class TimeSlotManager(models.Manager):
     def get_or_create_current(self):
         try:

templates/program/show_detail.html

@@ -14,7 +14,9 @@
     {% if show.id != 1 %}
       <p id="programslots">
       {% for slot in show.programslots.all %}
-        <span class="programslot">{{ slot }}</span><br />
+        {% if slot.has_active_timeslot %}
+          <span class="programslot">{{ slot }}</span><br />
+        {% endif %}
       {% endfor %}
       </p>
     {% endif %}