habtm & STI question

rubyonrails-talk
1

Hello All, I have a model "Company"

class Company < ActiveRecord::Base   has_and_belongs_to_many :types end

And I also have MachineType and CompanyType that STI from the "Type" model.

I have both a MachineType id and a CompanyType id and I want to get all companies that have both of those types. Is there a way similar to something like this:

@companies = MachineType.find(params[:type]).companies.types.find(@type) ?

I'm just trying to figure out how to do this type of thing without some nasty joins.

Thanks!

BJ Clark the science department.