gistfile1.txt

$ se = SharedExpense.last
  SharedExpense Load (0.1ms)  SELECT "shared_expenses".* FROM "shared_expenses" ORDER BY "shared_expenses"."id" DESC LIMIT 1
 => #<SharedExpense id: 2, name: "Paper Towel", stocked: true, last_purchased: nil, dwelling_id: 1, user_id: 1, created_at: "2012-10-10 21:55:59", updated_at: "2012-10-10 22:01:51"> 
$ se.user_id = 2
 => 2 
$ se
 => #<SharedExpense id: 2, name: "Paper Towel", stocked: true, last_purchased: nil, dwelling_id: 1, user_id: 2, created_at: "2012-10-10 21:55:59", updated_at: "2012-10-10 22:01:51"> 
$ SharedExpense.last
  SharedExpense Load (0.2ms)  SELECT "shared_expenses".* FROM "shared_expenses" ORDER BY "shared_expenses"."id" DESC LIMIT 1
 => #<SharedExpense id: 2, name: "Paper Towel", stocked: true, last_purchased: nil, dwelling_id: 1, user_id: 1, created_at: "2012-10-10 21:55:59", updated_at: "2012-10-10 22:01:51">