Active Record Querying-Help

I am new to rails and stuck on one Querying issue. Here is the situation.

Model: Category class Category < ActiveRecord::Base   has_and_belongs_to_many :postings   has_and_belongs_to_many :volunteers end

Model: Posting class Posting < ActiveRecord::Base   has_and_belongs_to_many :categories end

Model: Volunteer class Volunteer < ActiveRecord::Base   has_and_belongs_to_many :categories end

Is that not the same problem you posted a few days ago, and then posted the solution?

Colin