Check if timeline exists and when somebody tries to edit non existing timelime display error message. Add TODO regarding error message customization for Timeline. Add support for calendar widget in timeline for both gsoc and ghop programs (gsoc was hardcoded before).
Patch by: Pawel Solyga
Review by: to-be-reviewed
"""
Field-like classes that aren't really fields. It's easier to use objects that
have the same attributes as fields sometimes (avoids a lot of special casing).
"""
from django.db.models import fields
class OrderWrt(fields.IntegerField):
"""
A proxy for the _order database field that is used when
Meta.order_with_respect_to is specified.
"""
name = '_order'
attname = '_order'
column = '_order'