# Oracle\_enhanced adapter 'uninitialized constant' error

**URL:** <https://www.ruby-forum.com/t/oracle-enhanced-adapter-uninitialized-constant-error/151995>\
**Category:** Rails\
**Created:** [October 28, 2008, 8:07pm UTC](https://www.ruby-forum.com/t/oracle-enhanced-adapter-uninitialized-constant-error/151995 "2008-10-28T20:07:23Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![cetric\_blue](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/82dd89/32.png) [@cetric\_blue](https://www.ruby-forum.com/u/cetric_blue)\
**Post date:** [October 28, 2008, 8:07pm UTC](https://www.ruby-forum.com/t/oracle-enhanced-adapter-uninitialized-constant-error/151995/1 "2008-10-28T20:07:23Z")

</div>

Hi,

Can any one help me? I’m using Ubuntu and trying to connect to an oracle  
database using oracle\_enhanced adapter connection, but keeps getting  
following error:

/usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/dependencies.  
rb:275:in `load_missing_constant': uninitialized constant ActiveRecord::Connecti onAdapters::OracleEnhancedAdapter (NameError) from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:467:in`const\_missing’  
from  
/home/scheng/rails/ServerMonitoringSystem/config/initializers/oracl  
e\_enhanced.rb:1  
from  
/usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/  
dependencies.rb:502:in `load' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:502:in`load’  
from  
/usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/  
dependencies.rb:354:in `new_constants_in' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:502:in`load’  
from  
/usr/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:475:in `load_application_initializers' from /usr/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:474:in`  
each’  
… 7 levels…  
from  
/usr/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/commands/runner.rb:39  
from  
/usr/local/lib/site\_ruby/1.8/rubygems/custom\_require.rb:27:in `gem_ original_require' from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in`requ  
ire’

I have gem oracle\_enhanced-adapter, ruby\_oci8, etc. installed:

gem list

\*\*\* LOCAL GEMS \*\*\*

actionmailer (2.1.1, 2.1.0)  
actionpack (2.1.1, 2.1.0)  
activerecord (2.1.1, 2.1.0)  
activerecord-oracle-adapter (1.0.0.9250)  
activerecord-oracle\_enhanced-adapter (1.1.8)  
activeresource (2.1.1, 2.1.0)  
activesupport (2.2.0, 2.1.1, 2.1.0)  
builder (2.1.2)  
cgi\_multipart\_eof\_fix (2.5.0)  
daemons (1.0.10)  
fastthread (1.0.1)  
gem\_plugin (0.2.3)  
hpricot (0.6.161)  
markaby (0.5)  
mongrel (1.1.5)  
passenger (2.0.3)  
picnic (0.6.5)  
rack (0.4.0)  
rails (2.1.1, 2.1.0)  
rake (0.8.3)  
restr (0.4.0)  
reststop (0.3.0)  
ruby-oci8 (1.0.3)  
rubygems-update (1.3.0)  
rufus-scheduler (1.0.11)  
taskr (0.3.0)

Here’s my ruby code:

require ‘rubygems’  
require ‘active\_record’

ActiveRecord::Base.establish\_connection(  
:adapter =\> “oracle\_enhanced”,  
:database =\> “xyz”,  
:username =\> “user1”,  
:password =\> “password1”,  
:host =\> “abc.def.jkl:1521”)

class Connect \< ActiveRecord::Base  
set\_table\_name “changelog”  
end

current\_db = Connect.find(:first, :order =\> ‘applied\_dttm DESC’)

Any ideas from any genius?

Thanks!