James Byrne wrote:
> Rails 2.2.2
> Ruby 1.8.6
>
> ActiveRecord Session Store enabled
>
> For testing purposes I wish to ensure that no session exists. To
> accomplish this I wrote:
>
> session.delete if session
>
> But this fails if session == nil and I suspect that it does not work as
> I anticipate if session exists. In the console I see this behaviour:
>
> $ script/console
> Loading development environment (Rails 2.2.2)
>>> app.session
> NoMethodError: You have a nil object when you didn't expect it!
> The error occurred while evaluating nil.session
> from
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/test_process.rb:429:in
> `session'
> from (irb):1
>
>>> app.session.delete if app.session
> NoMethodError: You have a nil object when you didn't expect it!
> The error occurred while evaluating nil.session
> from
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/test_process.rb:429:in
> `session'
> from (irb):2
>
>>> app.get "/"
> => 200
>
>>> app.session
> => #<CGI::Session:0xb723ba24
> @dbman=#<CGI::Session::CookieStore:0xb723b8e4 @original=nil, ...
>
>>> app.session.delete if app.session
> => []
>
>>> app.session
> => #<CGI::Session:0xb723ba24
> @dbman=#<CGI::Session::CookieStore:0xb723b8e4 @original=nil,
>
> Now, I believed that nil == false and that the construct "object.method
> if object" should work. Evidently I am misinformed or there is
> something exceptional about session that I do not know.
>
> How is what I desire, to remove the session if one already exists,
> accomplished?
Perhaps
session.delete if defined?(session) && session
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