Rails 1.2 isn''t detecting the PostgreSQL 8.3 adapter (ruby-pg)

The Neurochild
Mon, 27 Oct 2008 18:07:40 -0000

Hi everyone.

When I run the rake db:migrate instruction, I get the following error
(with --trace):

(in /home/jescajadillo/aptana/workspace/amazing)
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:migrate
rake aborted!
no such file to load -- postgres
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
`gem_original_require''
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
`require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/
active_support/dependencies.rb:495:in `require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/
active_support/dependencies.rb:342:in `new_constants_in''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/
active_support/dependencies.rb:495:in `require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/
active_support/core_ext/kernel/requires.rb:7:in
`require_library_or_gem''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/
active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/
active_support/core_ext/kernel/requires.rb:5:in
`require_library_or_gem''
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.6/lib/
active_record/connection_adapters/postgresql_adapter.rb:7:in
`postgresql_connection''
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.6/lib/
active_record/connection_adapters/abstract/connection_specification.rb:
262:in `send''
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.6/lib/
active_record/connection_adapters/abstract/connection_specification.rb:
262:in `connection_without_query_cache=''
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.6/lib/
active_record/query_cache.rb:54:in `connection=''
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.6/lib/
active_record/connection_adapters/abstract/connection_specification.rb:
230:in `retrieve_connection''
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.6/lib/
active_record/connection_adapters/abstract/connection_specification.rb:
78:in `connection''
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.6/lib/
active_record/migration.rb:284:in `migrate''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.2.6/lib/tasks/databases.rake:
4
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:621:in `call''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:621:in
`execute''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:616:in `each''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:616:in
`execute''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:582:in
`invoke_with_call_chain''
/usr/local/lib/ruby/1.8/monitor.rb:242:in `synchronize''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:575:in
`invoke_with_call_chain''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:568:in
`invoke''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:2031:in
`invoke_task''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:2009:in
`top_level''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:2009:in
`each''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:2009:in
`top_level''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:2048:in
`standard_exception_handling''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:2003:in
`top_level''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:1982:in `run''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:2048:in
`standard_exception_handling''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:1979:in `run''
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.2/bin/rake:31
/usr/local/bin/rake:19:in `load''
/usr/local/bin/rake:19

This is weird because I have the ruby-pg gem and I have no problem
with Rails 2.1. I get this error with the previous version of Rails,
1.2. It''s not working here. What''s going on?

My project has PostgreSQL 8.3 database and I want to make it work. Can
you please help me?

Later...

The Neurochild.