"warning: default 'to_a' will be obsolete" from method_missing in association_proxy

I suspect it is a named scope problem. I added some name scopes and then this popped up. Still trying to track it down myself.

If you unpack rails into the vendor directory you could add something like this immediately before the line that generates the warning in association_proxy:

puts caller.inspect if method.to_s == 'to_a'

I resolved this using the suggestion above. Turned out I need to change the following:

To: