Order for a each loop

rubyonrails-talk
1

I have a model for users and another model for linenumbers and I have some code that looks like:

@user.linenumbers.each do |line|

end

and it loops through a user and their line numbers. What if I want to order this list, is there a way to do that?

I know I could just put these linenumbers into an a find statement in my controller and order it that way, but I would rather not do that way. Thanks,

-S

2

I have a model for users and another model for linenumbers and I have some code that looks like:

@user.linenumbers.each do |line|

end

and it loops through a user and their line numbers. What if I want to order this list, is there a way to do that?

Well you can give an :order option to the association yourself. Alternatively you could call sort or sort_by on your array

Fred

3

Well, after first thinking "Why not?" I'll offer this (it's only Ruby):

@user.linenumbers.sort_by{|line| line.number}.each do |line|    #... end

But I'll still suggest:

class User    has_many :linenumbers, :order => 'number' end

Or perhaps a named scope is OK,

class Linenumber    named_scope :ordered, :order => 'number' end

@user.linenumbers.ordered.each do |line|    #... end

-Rob

Rob Biedenharn http://agileconsultingllc.com Rob@AgileConsultingLLC.com

4

Or default_scope :order => 'number' if linenumbers are always to be sorted.

Coli9n