Calling all comments for certain posts

I am working with a Rails 2.3.9 application and in this case posts are workouts. I am trying to get all comments for the following workouts.

@workouts = Workout.today_only.all(:include => {:user => :memberships}, :conditions => ["workouts.public = '1' AND memberships.box_id = ?", @box.id], :order => "workouts.created_at DESC")

My associations a开发者_开发知识库re correct:

Workout has_many :comments
Comment belongs_to :workout

How would I get at list of comments on those specifc workouts ordered by created_at DESC?

Note: today_only is a named_scope and I can post the code if it is relevant.

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In your Workout model, add:

has_many :comments, :order => 'created_at DESC'

then you can do:

Workout.today_only.all(:include => [:comments, {:user => :memberships}], ...