Trying to get Rails working with Sybase ASE

Hi

I’m trying to use the activerecord-sybase-adapter to be able to use ASE
with
my rails applications.
But, I am struggling…

I followed (most of) the steps on this informative page:
http://trevoke.net/blog/2009/09/11/connecting-to-sybase-with-rails-on-windows-xp/

Initially I had Rails 2.3.5 installed.
I copied the “Ruby Sybase files” as instructed and the Sybase dll files
as
well, and I installed activerecord-sybase-adapter (1.0.0.9250).
The Sybase environment I already have on my office computer, so it
should be
allright.
I don’t have the mentioned JDBC_HOME setting or the classpath setting,
but
I’m using Open Client, so should there be any need for the JDBC
settings?

Ok, things looked promising, and I started creating a test rails app.

rails testapp

I then edited the database.yml to fit Sybase ASE
development:
adapter: sybase
database: testdb
username: username
password: password
host: sauron

The host, sauron, is defined in the sql.ini file.

Running rake db:create tells me that the database testdb already exists.
(true)
ruby script\generate scaffold person first_name:string last_name:string
WORKS OK
rake db:migrate --trace FAILS!
(in C:/work/ror/testapp)
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:migrate
rake aborted!
undefined method select_rows' for #<ActiveRecord::ConnectionAdapters::SybaseAdapter:0x97d8be8> c:/prg/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/database_statements.rb:27:inselect_values’
c:/prg/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/migration.rb:416:in
get_all_versions' c:/prg/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/migration.rb:532:inmigrated’
c:/prg/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/migration.rb:441:in
current_version' c:/prg/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/migration.rb:458:inmigrate’
c:/prg/ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/tasks/databases.rake:115:in
detect' c:/prg/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/migration.rb:458:ineach’
c:/prg/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/migration.rb:458:in
detect' c:/prg/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/migration.rb:458:inmigrate’
c:/prg/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/migration.rb:400:in
up' c:/prg/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/migration.rb:383:inmigrate’
c:/prg/ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/tasks/databases.rake:116
c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in call' c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:inexecute’
c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in each' c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:inexecute’
c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in
invoke_with_call_chain' c:/prg/ruby/lib/ruby/1.8/monitor.rb:242:insynchronize’
c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in
invoke_with_call_chain' c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:ininvoke’
c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in
invoke_task' c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:intop_level’
c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in each' c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:intop_level’
c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in
standard_exception_handling' c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:intop_level’
c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in run' c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:instandard_exception_handling’
c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in run' c:/prg/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31 c:/prg/ruby/bin/rake:19:inload’
c:/prg/ruby/bin/rake:19

so… looks like something’s missing here. In mysql_adapter.rb there is
a
select_row function, but not in the sybase_adapter.rb.

I tried downgrading Rails to 2.1.0 because I read somewhere that the
activerecord-sybase-adapter perhaps was not working for the latest Rails
releases, but got only a slightly different error message:
rake aborted!
select_rows is an abstract method
c:/prg/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/connection_adapters/abstract/database_statements.rb:34:in
`select_rows’

Anyone has an idea?

Best regards,
Rolf

For anyone interested in this topic, see this thread:

http://groups.google.com/group/ruby-on-rails-sybase-developers/browse_thread/thread/1eca62c3578cdf34?hl=en

Best regards,
Rolf

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