Can't set id on objects?

I'm revamping an app I wrote a couple months ago and have just discovered that I cannot set the id of new or existing objects.

[aegis:~] ryan% cd /tmp/ [aegis:/tmp] ryan% rails test [aegis:/tmp] ryan% cd test [aegis:/tmp/test] ryan% ./script/generate scaffold_resource blah id:integer title:string [aegis:/tmp/test] ryan% rake db:migrate [aegis:/tmp/test] ryan% ./script/console Loading development environment.

blah = Blah.create = 500

=> 500

=> true


ActiveRecord::RecordNotFound: Couldn't find Blah with ID=500


=> 1

When did id become protected and unmodifiable? I know for certain that I *used* to be able to set the id of objects, as I have a table full of examples where this was successfully done. I'm also fairly certain I didn't have to jump through any hoops to get that behavior...

Is it simply impossible to set the id of an object now? I can sort of see why this is a desirable default, but is there some way to override that behavior in my models? If not, that's unfortunate, as I now have to go mucking with a bunch of other code that I had hoped to leave be.