Fix #1 - NoneType' object is not subscriptable

mailing.py

@@ -49,6 +49,7 @@ def write_db(now, id, username, email, emailed_at, emailed):
         delta = now-row[0]
 
         cur.execute("UPDATE " + mailing_db_table + " SET elapsed_days=(%s), email=(%s), emailed=(%s) where account_id=(%s)", (delta, email, emailed, id))
+        print("Updating user " + str(id))
         
     conn.commit()
 
@@ -117,8 +118,11 @@ def check_alive(id):
     cur.execute("select last_sign_in_at from users where account_id=(%s)", (id,))
 
     row = cur.fetchone()
-    seen = row[0]
 
+    if row != None:
+      seen = row[0]
+    else:
+      seen = None
     cur.close()
 
     return seen
@@ -221,9 +225,13 @@ while i < len(inactive_users_id):
     email_datetime = row[0]
     email_datetime = email_datetime.replace(tzinfo=None)
 
-    if email_datetime < seen:
+    if seen != None:
+      reactivated = email_datetime < seen
+
+    if reactivated == True or seen == None: #if inactive user reactivated its account or deleted it we must delete related row from 'mailing_db_table'
      
       cur.execute("DELETE FROM " + mailing_db_table + " where account_id=(%s)", (inactive_users_id[i],))
+      print("Deleting user " + str(inactive_users_id[i]))
 
       conn.commit()