On 2015-02-07 22:05, Vijay Khemlani wrote:
> The direct solution would be something like this in your view
>
> events = Event.objects.order_by('event_date')
>
> event_tuples = []
> last_date_seen = None
>
> for event in events:
> if last_date_seen:
> date_difference = event.date - last_date_seen
> else:
> date_difference = None
>
> event_tuples.push((event, date_difference))
In the past I've created something like this as a filter, which lets
it be fairly generic. I also make it a generator rather than keeping
them all around. Something like (I don't have the exact code on hand)
from django import template
register = template.base.Library()
@register.filter(name="pairwise")
def pairwise(iterable, final=True):
i = iter(iterable)
a = next(i)
for b in i:
yield a, b
a = b
if final:
yield a, None
-tkc
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