order_by
andを取るクラスメソッドを追加できますpaginate_by
import itertools
def grouper(n, iterable, fillvalue=None):
args = [iter(iterable)] * n
return itertools.izip_longest(fillvalue=fillvalue, *args)
class Item(models.Model):
# attrs
@classmethod
def get_pagination_index(cls, self, order_by, paginate_by):
if order_by:
qs = cls.objects.all().order_by(order_by)
else:
qs = cls.objects.all()
pages = grouper(paginate_by, qs)
i = 0
for page in pages:
i += 1
if self in page:
return i
# return item_index = list(qs).index(self) # get the exact number