ActiveRecord::RecordNotFound returned when searching for non-existent records

Question

I' following the Ruby on Rails Tutorial. After I created an user, i destroyed it with destroy method, then i use find to check if it still exist, my console return exactly like the tutorial, but with some errors.
This is error image:

Here i created a user called "abc" with id: 7, then i destroyed and use User.find(7) to find user.

I installed rails with rvm and created gemset named 1.9.3@rails3tutorial2endEd. I searched but don't know what this is problem, can anybody help? Thanks so much.

Answer 1

That's normal. Since the record does not exist anymore, you would get ActiveRecord::RecordNotFound

If you wanted to return nil instead. You could try something like

User.where(:id => 51).exists?

which will return true or false.

Answer 2

Destroyed users cannot be found, since they no longer exist.