Rails - Feb 2009 - form to create multiple models

Hi

 I''m a RoR beginner so excuse any potential stupid questions.

I have 3 models in an attempt to model the following

1. I have a Dayworkout which is a workout for one days workout (day of
the week independent)
2. Weekworkout is a collection of Dayworkouts, one per day
3. Dateworkout is a separate model just to link a Dayworkout with a
Weekworkout but including the day-of-the-week info. (ie
Monday=workout1,Tuesday=workout2,Wednesday=workout1 etc...)

This is following what I think is the recommended approach, ie creating
a separate model just to link the two other models?


Here are the declarations

# Weekwork
class Weekworkout < ActiveRecord::Base
  has_many :dateworkouts
end
class CreateWeekworkouts < ActiveRecord::Migration
  def self.up
    create_table :weekworkouts do |t|
      t.string :name
   end
end

# Dayworkout
class Dayworkout < ActiveRecord::Base
  has_many :dateworkouts
end
class CreateDayworkouts < ActiveRecord::Migration
  def self.up
    create_table :dayworkouts do |t|
      t.string :name
    end
  end
end

#Dateworkout
class Dateworkout < ActiveRecord::Base
  belongs_to :dayworkout
  belongs_to :weekworkout
end
class CreateDateworkouts < ActiveRecord::Migration
  def self.up
    create_table :dateworkouts do |t|
      t.integer :dayworkout_id
      t.integer :weekworkout_id
      t.string :dayofweek
    end
  end
end

I think this is ok but my confusion starts when I try to create form to
create a new weekworkout. My controller is working ok, presenting the
correct data to the view but in the view I have my problems
# Controller
 def new
    @weekworkout = Weekworkout.new
    @coach = current_user.coach
    # present all the workouts this coach has defined to the view
    @dayworkouts = @coach.find_workouts
    # all the days of the week
    @daysofweek = %w{Monday Tuesday Wednesday Thursday Friday Saturday
Sunday}

    respond_to do |format|
      format.html # new.html.erb
      format.xml  { render :xml => @weekworkout }
    end
  end
# view
<% form_for(@weekworkout) do |f| %>
  <%= f.error_messages %>

  <p>
    <%= f.label :name %><br />
    <%= f.text_field :name %>
  </p>
  <% @daysofweek.each do |day|%>
  <p>
    <%= f.label day %>
    <%= f.collection_select(:dateworkouts, @dayworkouts, :id, :name )%>
  </p>
  <% end %>
  <p>
    <%= f.submit "Create" %>
  </p>
<% end %>

Basically I don''t know what to put in the collection_select arguments
to
return the data to the controller.
When I finish I want the following
1. Have created a Weekworkout with a name and 7 dateworkouts
2. Have created 7 dateworkouts with a day of the week, the id of the
Weekworkout and the id of the dayworkout.

If anything isn''t clear let me know and I will try and clarify.

Any ideas?

D
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