class Category < ActiveRecord::Base
class Posting < ActiveRecord::Base
class Volunteer < ActiveRecord::Base
Now Here is the problem I am trying to solve
I want to find out all the postings of the categories that the
volunteer is interested in. The volunteer might be interested in more
than one categories and posting might be assigned more than one
Here is the basic pseudocode
foreach(vol_cat in vol_cats)
postings=postings + vol_cat.postings
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