Active Record track changes with update_attributes

rubyonrails-talk
1

I am not sure I am thinking about this the correct way. I have a admin/maintenance scaffold to amend live data and I need to track the changes to data related to an order. e.g. change of address. I have a order_transaction model which I would like to record all of the data changes through the admin maintenance. I was hoping to use the AR tracking methods to help me. Rails 2.3.8

I do the normal read the order in from the database, pick up the attributes from params[:order} and then do an @order.update_attributes(params[:order]) The problem is that on success, @order.changes is nil. In the console:

ruby-1.8.7-p334 :024 > @o = Order.last   Order Load (0.4ms) SELECT * FROM "orders" ORDER BY orders.id DESC LIMIT 1

2

order.changes gives unsaved changes, so by design this will be empty after a successful save. You could do order.attributes = params[:order], inspect the changes and then save the object.

Fred

3

This might be useful. Worked well for me in the past. Works in Rails3 if you tweak the 'changes' bit as that is now reserved...

http://pjkh.com/articles/2009/02/02/creating-an-audit-log-in-rails

4

You could do order.attributes = params[:order], inspect the changes and then save the object.

Fred

@fred that worked perfectly.