I have a list of post with ids like
1,2,3,4,5,6,7,8,9,10,11,12
(json format)
The ids are of type String. But I would like to order it according to its numerical
I guess your ids are strings. A simple solution would be use a no. operation inside order by. So instead ofr orderBy:'id'
just use orderBy:'id*1'
this will consider the id as no. and sort it according to the numerical order.
This is all you need -
Demo: http://plnkr.co/edit/MSrPTZQP49F7Nzwhv6ef?p=preview