From: Hugues Brunelle <hugues@2associes.com>
Date: 2009-06-14T01:51:22+09:00
Subject: Manipulate HABTM relationships in views

Hi everyone.
I'm currently working on a bodybuilding supplement Website which have 3
models :

* Stack :
has_and_belongs_to_many :products
* Product :
has_and_belongs_to_many :stacks
has_and_belongs_to_many :ingredients
* Ingredient :
has_and_belongs_to_many :products

Now what I am trying to do is list all the ingredients for a Stack
(using standard params[:id]). It seems that I cannot pass multiple
product_ids (but one id work fine!) to get the ingredients listing.

Here's a partial code from my controller :

=== START ===

  def stack
    begin
      @stack = Stack.find(params[:id])
      render :template => "public/stack_#{@lang}"
    rescue ActiveRecord::RecordNotFound
      logger.error("Attempt to access invalid stack #{params[:id]}")
      flash[:notice] = "D辿sol辿, cette formule est introuvable."
      redirect_to :action => :index
    end
  end

=== END ===

Any help would be appreciate and I can provide more information if my
request isn't clear enought.

I am using RAILS_GEM_VERSION = '1.2.6'

Thanks

Hugues
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