named_scope :order_by_position, :order => ‘CASE WHEN position = 1 THEN -1 ELSE name END ASC’

In Log file I am getting:

OCIError: ORA-00932: inconsistent datatypes: expected NUMBER got CHAR: SELECT * FROM groups ORDER BY CASE WHEN position = 1 THEN -1 ELSE name END ASC)

# Table name: products
#
# id :integer(38) not null, primary key
# name :string(255)
# created_at :datetime
# updated_at :datetime
# position :integer(38)

I am running this with Rails 2.3.3 and activerecord-oracle_enhanced-adapter (1.2.3)

I tried using TO_NUMBER(to_number) but didn’t work. And in general what things cause these errors.

What changes are required here to get it working?

Thanks,

Piyush Y. Patil

I seem to be having a problem with the ActiveRecord find parameter.

I get the following error back:

NoMethodError: undefined method `empty?’ for 20:Fixnum
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/base.rb:1624:in `instantiate’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/base.rb:661:in `find_by_sql’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/base.rb:661:in `collect!’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/base.rb:661:in `find_by_sql’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/base.rb:1548:in `find_every’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/base.rb:1505:in `find_initial’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/base.rb:613:in `find’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/base.rb:623:in `first’
from (irb):1

Any pointers?

The table I am trying to connect to is:

create_table “reporter_status”, :id => false, :force => true do |t|
t.string “identifier”
t.integer “serial”, :limit => 16, :precision => 16, :scale => 0
t.string “node”, :limit => 64
t.string “nodealias”, :limit => 64
t.string “manager”, :limit => 64
t.string “agent”, :limit => 64
t.string “alertgroup”, :limit => 64
t.string “alertkey”, :limit => 64
t.string “summary”
t.string “location”, :limit => 64
t.integer “class”, :limit => 16, :precision => 16, :scale => 0
t.integer “poll”, :limit => 16, :precision => 16, :scale => 0
t.integer “type”, :limit => 16, :precision => 16, :scale => 0
t.integer “tally”, :limit => 16, :precision => 16, :scale => 0
t.boolean “severity”, :precision => 1, :scale => 0
t.integer “owneruid”, :limit => 16, :precision => 16, :scale => 0
t.integer “ownergid”, :limit => 16, :precision => 16, :scale => 0
t.integer “acknowledged”, :limit => 16, :precision => 16, :scale => 0
t.datetime “lastmodified”
t.datetime “firstoccurrence”
t.datetime “lastoccurrence”
t.datetime “deletedat”
t.boolean “originalseverity”, :precision => 1, :scale => 0
t.string “ipaddress”, :limit => 64
t.string “customername”, :limit => 64
t.integer “devicecategory”, :limit => 8, :precision => 8, :scale => 0
t.string “position”, :limit => 64
t.string “tag”, :limit => 64
t.string “custlocation”, :limit => 64
t.string “ttno”, :limit => 64
t.integer “escalation”, :limit => 8, :precision => 8, :scale => 0
t.datetime “clearedtime”
t.datetime “acktime”
t.string “circuitdetails”, :limit => 50
t.integer “impactstate”, :limit => 4, :precision => 4, :scale => 0
t.integer “notificationid”, :limit => 16, :precision => 16, :scale => 0
t.string “accountid”, :limit => 64
t.integer “servicediff”, :limit => 4, :precision => 4, :scale => 0
t.string “relationship”, :limit => 64
t.integer “sourceserverserial”, :limit => 16, :precision => 16, :scale => 0
t.string “servername”, :limit => 64, :null => false
t.integer “serverserial”, :limit => 16, :precision => 16, :scale => 0, :null => false
t.decimal “expiretime”
t.string “alerttype”, :limit => 64
end

I have been battling weird errors with date/datetime/time while using Oracle’s original adapter. I installed yours and everything worked like a charm.

gem install hoe

Please verify that
1. Oracle Instant Client is installed correctly.
Can you connect to database using sqlnet?

2. ruby-oci8 1.0.3 is installed correctly.
Try something like:

ruby -r oci8 -e “OCI8.new(‘user’, ‘password’,'database’).exec(‘select * from dual’) do |r| puts r.join(‘,’); end”

to verify that ruby-oci8 is working

3. Verify that activerecord-oracle_enhanced-adapter is working from irb:

require ‘rubygems’
gem ‘activerecord’
gem ‘activerecord-oracle_enhanced-adapter’
require ‘activerecord’
ActiveRecord::Base.establish_connection(:adapter => “oracle_enhanced”,
:database => “database”,:username => “user”,:password => “password”)

and see if it is successful (use your correct database, username and password)

Btw if you have further issues please use http://groups.google.com/group/oracle-enhanced discussion group – it will be more appropriate than long comments here :)

/Library/Ruby/Gems/1.8/gems/activerecord-2.2.2/lib/active_record/connection_adapters/abstract/connection_specification.rb:74:in `establish_connection’: Please install the oracle_enhanced adapter: `gem install activerecord-oracle_enhanced-adapter` (Expected /Library/Ruby/Gems/1.8/gems/activerecord-oracle_enhanced-adapter-1.1.8/lib/active_record/connection_adapters/oracle_enhanced_adapter.rb to define ActiveRecord::ConnectionAdapters::OracleEnhancedAdapter) (RuntimeError)

As you can see from my gem list, the oracle_enhanced-adapter is installed. Here is the complete list in case it’s useful.

actionmailer (2.2.2, 2.1.1, 2.1.0, 1.3.6)
actionpack (2.2.2, 2.1.1, 2.1.0, 1.13.6)
actionwebservice (1.2.6)
activerecord (2.2.2, 2.1.1, 2.1.0, 1.15.6)
activerecord-oracle_enhanced-adapter (1.1.8, 1.1.7)
activeresource (2.2.2, 2.1.1, 2.1.0)
activesupport (2.2.2, 2.1.1, 2.1.0, 1.4.4)
acts_as_ferret (0.4.1)
capistrano (2.0.0)
cgi_multipart_eof_fix (2.5.0, 2.2)
daemons (1.0.9, 1.0.7)
dnssd (0.6.0)
fastthread (1.0.1, 1.0)
fcgi (0.8.7)
ferret (0.11.4)
gem_plugin (0.2.3, 0.2.2)
highline (1.2.9)
hpricot (0.6)
libxml-ruby (0.3.8.4)
mocha (0.9.1)
mongrel (1.1.4, 1.0.1)
needle (1.3.0)
net-sftp (1.1.0)
net-ssh (1.1.2)
piston (1.4.0)
rails (2.2.2, 2.1.1, 2.1.0, 1.2.6)
rake (0.8.3, 0.8.1, 0.7.3)
RedCloth (3.0.4)
redgreen (1.2.2)
ruby-openid (1.1.4)
ruby-yadis (0.3.4)
rubygems-update (1.3.1, 1.2.0)
rubynode (0.1.3)
sqlite3-ruby (1.2.1)
termios (0.9.4)

Everything seems to be in place, but it’s not working. Despite many attempts to uninstall and re-install much of rails as well as trying out different versions of the gems, nothing has fixed it. I can hobble along using the standard oracle adaptor which seems to work fine, but I’d love to find a solution to this problem. Any ideas?

Or do you need to use ActiveRecord without Rails to connect to Oracle database?

ruby -r oracle_enhanced -e “OCI8.new(‘ruby’, ‘ruby’, ‘ifstest’).exec(‘select sysdate FROM dual’){|r| puts r.join(‘,’)}”

I wanted to test the oracle_enhanced adapter and I get the error msg
ruby: no such file to load — oracle_enhanced (LoadError)

Cheers
Dave Smylie