为什么Heroku仍不使用我的Ruby 1.9.3版？

Question

I followed every step in here: I have this in my gem file

ruby "1.9.3"

and then when I deploy heroku says:

-----> Ruby app detected
-----> Compiling Ruby/Rails
-----> Using Ruby version: ruby-1.9.3
-----> Installing dependencies using 1.5.2

Then when I do

heroku run "ruby -v"

I still get

ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-linux]

Then I added a path:

heroku config:set PATH=bin:vendor/bundle/ruby/1.9.1/bin:/usr/local/bin:/usr/bin:/bin

Deployed again, and still same result:

I tried:

heroku config:set PATH=bin:vendor/bundle/ruby/1.9.3/bin:/usr/local/bin:/usr/bin:/bin

Still no use:

In my heroku Log I get this:

/app/vendor/bundle/ruby/1.9.1/gems/bundler-1.5.2/lib/bundler/definition.rb:390:in `validate_ruby!': Your Ruby version is 1.9.2, but your Gemfile specified 1.9.3 (Bundler::RubyVersionMismatch)

It kind of is driving me nuts, I can't get Heroku to use 1.9.3.

I looked at the following questions as well: Ruby version is not upgrading on Heroku Is it possible to run my Rails app on Heroku with Ruby 1.9.3? If so, how? How can I choose Ruby version on Heroku? Heroku cedar doesn't upgrade to ruby-1.9.3

Still can't get anywhere

Answer 1

After a very painful search by removing and adding stuff from my most recent commit I realized that a file . bash_profile was added to my Rails Root app that had this in it:

export PGHOST=localhost
export PATH=/usr/local/bin:$PATH

So I just removed that, because this calls up the path to the Ruby version, the default one. I hope no one ends up making same mistake.