From bee0bf325515b72abafd2eacf1d225c838cf33ee Mon Sep 17 00:00:00 2001
From: Sofia Papagiannaki <papagian@gmail.com>
Date: Mon, 17 Sep 2012 18:44:56 +0300
Subject: [PATCH] Custom template tag for months since a specific date

---
 snf-astakos-app/astakos/im/templates/im/billing.html |    6 ++++++
 snf-astakos-app/astakos/im/templatetags/filters.py   |   11 +++++++++++
 2 files changed, 17 insertions(+)

diff --git a/snf-astakos-app/astakos/im/templates/im/billing.html b/snf-astakos-app/astakos/im/templates/im/billing.html
index bffd8e7..4e00e00 100644
--- a/snf-astakos-app/astakos/im/templates/im/billing.html
+++ b/snf-astakos-app/astakos/im/templates/im/billing.html
@@ -6,4 +6,10 @@
     {% if data %}
         {{ data }}
     {% endif %}
+    
+   <form action="{% url astakos.im.views.billing %}">{% csrf_token %}
+        {% for m in user.date_joined|months_since %}
+            {{ m|date:"M Y" }}
+        {% endfor %}
+    </form>
 {% endblock %}
diff --git a/snf-astakos-app/astakos/im/templatetags/filters.py b/snf-astakos-app/astakos/im/templatetags/filters.py
index a6b9955..da380c8 100644
--- a/snf-astakos-app/astakos/im/templatetags/filters.py
+++ b/snf-astakos-app/astakos/im/templatetags/filters.py
@@ -32,6 +32,8 @@
 # or implied, of GRNET S.A.
 
 from django import template
+from datetime import datetime
+from dateutil.relativedelta import relativedelta
 
 register = template.Library()
 
@@ -62,3 +64,12 @@ def split(object_list, user):
         return d
     except:
         return {'own': object_list, 'other': ()}
+
+
+@register.filter
+def months_since(start_date, end_date=datetime.now()):
+    delta = relativedelta(months=+1)
+    d = start_date
+    while d < end_date:
+        d += delta
+        yield d
\ No newline at end of file
-- 
1.7.10.4