Problem with default_scope in Rails 3? NoMethodError

Question

I am experiencing a weird bug after adding this to my Alternative-model:

default_scope order(:number)

On the first page refresh, everything works fine. On subsequent refreshes, I get

NoMethodError in Pages#show 
undefined method `written?' for #<Alternative:0x10455c558>

Alternative most assuredly has the written? method. I am running Passenger, so after a

touch tmp/restart.txt

the page works again. For the first refresh. But the error message is back on subsequent refreshes again. Removing the default_scope solves the issue (but only after another server restart).

Edit: The bug is also present when running on WEBrick through rails server, so it is not connected to Passenger.

Edit: written? is an instance method on Alternative. The bug also appears when trying to access methods gained through has_many, like this:

has_many :restrictions

alternative.restrictions.empty? # => NoMethodError

Anyone else experiencing problems with default_scope in Rails 3? Or have a solution? Thanks!

Answer 1

I have not experienced odd problems with default_scope, but I did find that Passenger wasn't reloading code properly in development mode with the current Rails 3 HEAD -- leading to baffling assertions like the one you ran into.

Does it work if you just run "rails server"?

Answer 2

Please read this article

http://ryandaigle.com/articles/2008/11/18/what-s-new-in-edge-rails-default-scoping

https://rails.lighthouseapp.com/projects/8994/tickets/1812-default_scope-cant-take-procs