Add script to calculate subscriber membership lengths

apiserver/calc_subs_membership_length.py

@@ -0,0 +1,42 @@
+import django, sys, os
+os.environ['DJANGO_SETTINGS_MODULE'] = 'apiserver.settings'
+django.setup()
+
+from django.db.models import Prefetch, Sum
+from apiserver.api import models, utils
+
+today = utils.today_alberta_tz()
+
+members = models.Member.objects.filter(paused_date__isnull=True)
+related_tx = Prefetch(
+    'user__transactions',
+    queryset=models.Transaction.objects.filter(category='Membership'),
+)
+
+sub_total = 0
+sub_count = 0
+other_total = 0
+other_count = 0
+
+for member in members.prefetch_related(related_tx):
+    name = member.preferred_name + ' ' + member.last_name[0]
+    start = member.application_date
+    length = today - member.application_date
+    days = length.days
+
+    if member.user.transactions.count():
+        if member.user.transactions.latest('date').paypal_txn_type == 'subscr_payment':
+            print('subscriber,{},{},{}'.format(name, start, days))
+            sub_total += days
+            sub_count += 1
+            continue
+
+    print('non-subscr,{},{},{}'.format(name, start, days))
+    other_total += days
+    other_count += 1
+
+
+print('subscriber avg:', int(sub_total / sub_count))
+print('non-subscr avg:', int(other_total / other_count))
+
+