@assignments = Organization.find(session[:org_id]).assignments.find(:all)
# =>
  Organization Load (0.4ms)   SELECT * FROM "organizations" WHERE ("organizations"."id" = 1)
  Assignment Load (0.5ms)   SELECT "assignments".* FROM "assignments" INNER JOIN "employees" ON "assignments".employee_id = "employees".id WHERE (("employees".organization_id = 1)