Get point for reverse scope

[macfurin]

Hi, first thank you for this awesome gem !

I need to get a point position for a record in an order_query scope in reverse order. Something like:

p = Post.published.order_home_reverse_at(post)

or

p = post.order_home_reverse(posts)

Is there a way to do this ? The only way I found is to define 2 order_query, one for each direction...
Thanks

[glebm]

There is no "reverse point", but you have the following opposite methods:

• Point#after and Point#before (same as Point#side(:after/:before)).
• Space#scope and Space#scope_reverse.

Together these allow any kind of search in either direction.

[macfurin]

Thank you but this is not exactly my need.
Say you have Post records in this order on index page:

Post.order_home #=> [a, b, c, d]

To find c position on show page I use:

p = Post.order_home_at(c)
# or
p = c.order_home(Posts)

p.position #=> 3

Now I reverse order on 'indexlike this:

Post.order_home_reverse #=> [d, c,  b, a]

I expect to retrieve c at 2nd position with this kind of method:

p = Post.order_home_reverse_at(c)
# or
p = c.order_home_reverse(Posts)

p.position #=> 2