Help With Search Function in Model

Hello Everyone,

I am pretty new to ROR and am stuck on how to proceed. I have an
application that stores businesses along with there delivery boundaries.
The boundaries are stored as 4 latitude/longitude points. When a user
does a search they enter there address and I need to bring back all of
the businesses that deliver to them.

I use what’s called a Point in Poly algorithm to determine if a business
delivers to the input address.

In my controller I set the result variable to a call to Search in the
model like so…

@businesses = Business.search(params[:search])

In my model I have…

def self.search(search)
@all Businesses= find(:all)

for bus in 0...@ @all Businesses.length
  if( inPoly?(How do I get the attributes of bus to pass to inPoly?))
   How Do I add this bus to my result list?
  end
end

How do I return my new list to the controller?
end

  def self.inPoly?(point1,point2,point3,point4,testPoint)
    I can do this
  end

What I am really stuck on is how I can build my list in my search
function. I am not sure how to access the attributes of each business in
the for loop. And I am not sure how to return the result to the
controller. Any help at all would be really apprectiated.