I have a button\_to that I want to perform a PUT action (there is only one thing that can be updated about this resource - it will be updated as being 'acknowledged', so there are no other form fields associated with firing the action). 

This is in my view (the controller is given explicitly because the button is on a view that belongs to another controller):

```
<%= button_to "Acknowledged", :controller => 'practice_sessions', :id => @practice_session.id, :method => :put %>

```

In my routes file, the resource has been declared as a restful resource: 

```
  resources :practice_sessions

```

The controller for this resource has a create and an update action, and the button\_to above calls the create action. I want it to call the update action. 

This comes through the log right before the create action fires: 

```
Started POST "/practice_sessions?id=21&method=put" for 127.0.0.1 at 2010-11-17 08:52:46 +0000
  Processing by PracticeSessionsController#create as HTML
  Parameters: {"authenticity_token"=>"1EW0IlI38d0f4wST5azrCEZVZPfih7i0UvCGSF7eqbc=", "id"=>"21", "method"=>"put"}

```