Add a sample validation function. The parse_date will parse and cleanup dates entered by users. Issue #104.

mayan/apps/metadata/settings.py

@@ -1,11 +1,12 @@
 """Configuration options for the metadata app"""
 
+from dateutil.parser import parse
+
 from django.contrib.auth.models import User
 from django.utils.timezone import now
 
 from smart_settings.api import register_settings
 
-
 default_available_functions = {
     'current_date': now().date,
 }
@@ -15,6 +16,7 @@ default_available_models = {
 }
 
 default_available_validators = {
+    'parse_date': lambda input: parse(input).isoformat()
 }
 
 register_settings(

requirements/common.txt

@@ -23,6 +23,7 @@ pdfminer==20110227
 psutil==2.1.3
 pycountry==1.8
 pytz==2014.4
+python-dateutil==2.4.0
 python-gnupg==0.3.6
 python-hkp==0.1.3
 python-magic==0.4.6