Habtm & STI question

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.

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