Recursvie Search Refactoring

Hi, All

I was wondering if somebody could suggest a better way to do it. I got
it working but it's a bit dirty and returns too much extra fluff.

I'm trying to do a recursive search on an a collection of Objects.

A better way to illustrate it is an Org Chart.

Lets say I have Employee and ManagedByEmployee Objects

Employee hold user id , name, address, etc....
also:
has_many :managed_by_employees, :dependent => :destroy

ManagedByEmpoyee holds 3 attributes: id, employee_id and
managed_by_employee_id
also:
belongs_to :employee
belongs_to :managed_by_employee, :class_name => "Employee", :foreign_key
=> "managed_by_employee_id"

This allows me to do any searches 1 level deep. I can find who this
particular employee manages and who he is managed by. That trivial.

What I want to do is a drill down search.

Let's say I do:
   @emps = find_all_by_managed_by_employee_id(3)
This would return me all of the empployees that are managed by employee
#3, lets say I want to go through that list and check all of the
employees and see who they manage, and so on and so forth - until I
reach the bottom, where I find employee that don't manage anyone.

Then I want a similar function that goes in the other direction.

I wrote a model methods that handle that = but there are 2 problems with
them:
1) They return too many duplicate records - and I have to clean them up
at the end.
2) I return all of the employees that employee # 3 manages but, I can't
tell how they relate to employee 3 (well I can go through the chain
again and figure it out) But there's got to be a btter way to do it then
running more sql statement.

Below are my model functions

def self.find_employees_that_i_manage(employee, employees_array)
  arr = employees_array
  arr += @managed_employees =
find_all_by_managed_by_employee_id(employee)
    unless @managed_employees.empty?
      @managed_employees.each do |s|
        arr += find_employees_that_i_manage(s.employee_id, arr)
      end
    end
  arr |= arr
end

def self.find_employees_that_manage_me(employee, employees_array)
  arr = employees_array
  arr += @managed_by_employees = find_all_by_employee_id(employee)
    unless @managed_by_employees.empty?
       @managed_by_employees.each do |s|
          arr += find_employees_that_manage_me(s.managed_by_employee_id,
arr)
       end
    end
  arr |= arr
end

Here is how I call them from controller:
  @manages_employees =
     managedByemployee.find_employees_that_i_manage(params[:id], p=[])
  @managed_by_employees =
     managedByemployee.find_employees_that_manage_me(params[:id], p=[])

Anyone has any suggestions?