Handle all TLE exceptions

network/base/management/commands/update_all_tle.py

@@ -26,12 +26,12 @@ class Command(BaseCommand):
             # Get latest satellite TLE and check if it changed
             tle = sat.tle()
             try:
-                latest_tle = obj.latest_tle
-                if latest_tle.tle1 == tle[1]:
+                latest_tle = obj.latest_tle.tle1
+                if latest_tle == tle[1]:
                     self.stdout.write(('Satellite {} with Identifier {} '
                                       'found [defer]').format(obj.name, obj.norad_cat_id))
                     continue
-            except Tle.DoesNotExist:
+            except:
                 pass
 
             Tle.objects.create(tle0=tle[0], tle1=tle[1], tle2=tle[2], satellite=obj)

network/base/views.py

@@ -175,9 +175,15 @@ def prediction_windows(request, sat_id, start_date, end_date):
         }
         return JsonResponse(data, safe=False)
 
-    satellite = ephem.readtle(str(sat.latest_tle.tle0),
-                              str(sat.latest_tle.tle1),
+    try:
+        satellite = ephem.readtle(str(sat.latest_tle.tle0),
+                                  str(sat.latest_tle.tle1),
                               str(sat.latest_tle.tle2))
+    except:
+        data = {
+            'error': 'No TLEs for this satellite yet.'
+        }
+        return JsonResponse(data, safe=False)
 
     end_date = datetime.strptime(end_date, '%Y-%m-%d %H:%M')