Ruby on Rails

It will not be sorted. You just pass an array basically to that named scope. And you will get results that satisfy the array so to speak, but it can come in any order. Just add .order('id DESC')  (or ASC) clause explicitly.

2012/7/25 Erwin <yves_dufour@mac.com>

Thanks Colin for your answer

let me draw the big picture :
in my iatme controller ,before the display ( scope and pagination) , I
searched for geolocalized data of item ( with distance from the
search), and I get a sorted array of Item Ids, (already sorted on the
distance :  item_ids = [ 5, 2, 1, 10, ...] )


then I display the items using Kaminari pagination  ( Kaminary doesn't
paginate an array )

@items = Item.geo_filtered_with(geo_ids).page params[:page]

and my model scope is :

  scope :geo_filtered_with, lambda { |item_ids|
    where(:id => item_ids)
  }

so I wonder if the result of the scope will keep the same order as the
item_ids
which means :
items.id IN [ 5, 2, 1, 10, ...]  will always get items records  5, 2,
1, 10 .... in this order

that's why I did not specified a sort order with the scope, is it
clear ?



On 25 juil, 14:38, Colin Law <clan...@googlemail.com> wrote:

> On 25 July 2012 13:35, Erwin <yves_duf...@mac.com> wrote:
>
> >  I am using this scope , in which geo_ids is a sorted array of
> > Ids ...
>
> >  scope :geo_filtered_with, lambda { |geo_ids|
> >     where(:id => geo_ids)
> >   }
>
> > is the resulting output always sorted according to this order ? or
> > should I modify it ?
>
> Since you have not specified any sort specification the order is not
> defined.  If you want a particular order you must specify it.
>
> Colin
>
>
>
>
>
>
>
>
>
> > thanks for your feedback
>
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