Adding number of organizers retained

metrics/views.py

@@ -94,6 +94,7 @@ def get_metrics_and_aggregate_per_project():
                     "Number of new editors": metric.number_of_new_editors,
                     "Number of partnerships": metric.number_of_partnerships,
                     "Number of organizers": metric.number_of_organizers,
+                    "Number of organizers retained": metric.number_of_organizers_retained,
                     "Number of people reached through social media": metric.number_of_people_reached_through_social_media,
                     "Occurence": metric.boolean_type,
                 }
@@ -120,6 +121,7 @@ def get_metrics_and_aggregate_per_project():
                     "Number of new editors": Editor.objects.filter(editors__in=reports, account_creation_date__gte=F('editors__initial_date')).count() or 0,
                     "Number of partnerships": Partner.objects.filter(partners__in=reports).distinct().count() or 0,
                     "Number of organizers": Organizer.objects.filter(organizers__in=reports).distinct().count() or 0,
+                    "Number of organizers retained": Organizer.objects.filter(retained=True, organizers__in=reports).distinct().count() or 0,
                     "Number of people reached through social media": reports.aggregate(total=Sum(F("number_of_people_reached_through_social_media")))["total"] or 0,
                     "Occurence": reports.filter(metrics_related__boolean_type=True).exists() or False,
                 }