Rails - Feb 2010 - Rails Upgrade / Installation Error

I have been learning Ror, and developing my first application.  I
unfortunately am also relatively new to the mac, so please forgive my
ignorance if I did something blatantly ridiculous.

I have been using rails 2.2.2.  I learned about
accepts_nested_attributes_for this morning, and realized I had to
update my version of rails.


I first performed a gem update.  I cant recall the exact command I
invoked at this particular moment, but I believe it was rake
rails:update.  There was an installation warning, and the installer
commented that it was installed in the following directory:

/Users/triguy_nc/.gem/ruby/1.8/bin

Being totally stupid, I figured - heck, this isnt goign to work, so I
inserted the above into my $PATH in .profile.   I actually thought the
rake rails:update would have updated my version of rails (I was in a
working directory when I did this)

I then issued the following command:   gem install -v=2.3.5 rails

I received the following error message after the install:

WARNING:  Installing to ~/.gem since /Library/Ruby/Gems/1.8 and
	  /usr/bin aren''t both writable.
Successfully installed rails-2.3.5
1 gem installed
Installing ri documentation for rails-2.3.5...
Installing RDoc documentation for rails-2.3.5...
/users/triguy_nc/work/j4m1> ruby script/server
/Library/Ruby/Site/1.8/rubygems.rb:827:in `report_activate_error'':
RubyGem version error: rack(1.0.0 not ~> 1.0.1) (Gem::LoadError)
	from /Library/Ruby/Site/1.8/rubygems.rb:261:in `activate''
	from /Library/Ruby/Site/1.8/rubygems.rb:68:in `gem''
	from /Users/triguy_nc/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/
action_controller.rb:34
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in
`gem_original_require''
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in
`require''
	from /Users/triguy_nc/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/
active_support/dependencies.rb:156:in `require''
	from /Users/triguy_nc/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/
active_support/dependencies.rb:521:in `new_constants_in''
	from /Users/triguy_nc/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/
active_support/dependencies.rb:156:in `require''
	from /Users/triguy_nc/.gem/ruby/1.8/gems/rails-2.3.5/lib/commands/
server.rb:2
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in
`gem_original_require''
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in
`require''
	from script/server:3



When I issue $PATH at teh command prompt, I receive the following
response:

-bash: /Users/triguy_nc/.gem/ruby/1.8/bin:/opt/local/bin:/opt/local/
sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/git/bin:/
usr/X11/bin: No such file or directory

So, I am basically hosed, but do think I can revert to 2.2.2 in my
environment.rb.  BUT, I really need to learn some basics of what I am
trying to do.

Questions:

1.  Can someone give me some guidance to undo my errors above, and
repair my system so the installation is proper?
2. Can you also point me to a tutorial to help me to understand the
method to update rails, so I dont make the same hack mistakes again.

Thanks

Lee

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Lee Brown wrote:
> 
> /Users/triguy_nc/.gem/ruby/1.8/bin
> 
> Being totally stupid, 
*snigger* Nah. Just ignorant, like all of us when we first start!
> I figured - heck, this isnt goign to work, so I
> inserted the above into my $PATH in .profile.   I actually thought the
> rake rails:update would have updated my version of rails (I was in a
> working directory when I did this)
That is the first thing you''ll need to undo - or rather, it''s
fine, but
add it at the END of your path, not at the beginning.
> 
> I then issued the following command:   gem install -v=2.3.5 rails
Well.. Why don''t you try "gem update" now ? And then
let''s see if
everything goes away.
> 
> I received the following error message after the install:
> 
> WARNING:  Installing to ~/.gem since /Library/Ruby/Gems/1.8 and
>     /usr/bin aren''t both writable.
That''s because you should have done "sudo gem install" -
although on a
one-user machine, this is merely semantics, on a multi-user machine, it 
would mean that the gem is available for everyone. Likewise, "sudo gem 
update" would do an update for all the gems in the machine''s
repository.
> Successfully installed rails-2.3.5
> 1 gem installed
> Installing ri documentation for rails-2.3.5...
> Installing RDoc documentation for rails-2.3.5...
> /users/triguy_nc/work/j4m1> ruby script/server
> /Library/Ruby/Site/1.8/rubygems.rb:827:in `report_activate_error'':
> RubyGem version error: rack(1.0.0 not ~> 1.0.1) (Gem::LoadError)
Apparently, you need rack 1.0.1 .. The "sudo gem update" command may 
help.

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