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comp.lang.ruby

PostgreSQL database connectivity from ActiveRecord?

Abraham Vionas

11/22/2004 9:03:00 PM

Hi, I'm (still) working through the Rails Todo List tutorial, and now have
run up against what I think is an error being thrown by Rails because it
can't find/connect to my PostgreSQL DB. I have installed Postgres-pr-0.2.1
and verified that I can connect using it, but I have no idea - beyond the
configuration of the yaml file - of how to make sure that ActiveRecord can
connect to my DB fine. The error I get is below in case someone recognizes
it as being from something other than db connectivity.



TypeError in Todo#index


superclass mismatch for class ParseError

C:/cs/ruby/lib/ruby/gems/1.8/gems/postgres-pr-0.2.1/lib/postgres-pr/message.
rb:9

C:/cs/ruby/lib/ruby/site_ruby/1.8/rubygems/loadpath_manager.rb:5:in
`require__'

C:/cs/ruby/lib/ruby/site_ruby/1.8/rubygems/loadpath_manager.rb:5:in
`require'

C:/cs/ruby/lib/ruby/gems/1.8/gems/postgres-pr-0.2.1/lib/postgres-pr/connecti
on.rb:6

C:/cs/ruby/lib/ruby/site_ruby/1.8/rubygems/loadpath_manager.rb:5:in
`require__'

C:/cs/ruby/lib/ruby/site_ruby/1.8/rubygems/loadpath_manager.rb:5:in
`require'

C:/cs/ruby/lib/ruby/gems/1.8/gems/postgres-pr-0.2.1/lib/postgres.rb:7

C:/cs/ruby/lib/ruby/site_ruby/1.8/rubygems/loadpath_manager.rb:5:in
`require__'

C:/cs/ruby/lib/ruby/site_ruby/1.8/rubygems/loadpath_manager.rb:5:in
`require'

C:/cs/ruby/lib/ruby/gems/1.8/gems/activerecord-1.1.0/lib/active_record/conne
ction_adapters/abstract_adapter.rb:10:in `require_library_or_gem'

C:/cs/ruby/lib/ruby/gems/1.8/gems/activerecord-1.1.0/lib/active_record/conne
ction_adapters/postgresql_adapter.rb:20:in `postgresql_connection'

C:/cs/ruby/lib/ruby/gems/1.8/gems/activerecord-1.1.0/lib/active_record/conne
ction_adapters/abstract_adapter.rb:140:in `send'

C:/cs/ruby/lib/ruby/gems/1.8/gems/activerecord-1.1.0/lib/active_record/conne
ction_adapters/abstract_adapter.rb:140:in `connection='

C:/cs/ruby/lib/ruby/gems/1.8/gems/activerecord-1.1.0/lib/active_record/conne
ction_adapters/abstract_adapter.rb:104:in `retrieve_connection'

C:/cs/ruby/lib/ruby/gems/1.8/gems/activerecord-1.1.0/lib/active_record/base.
rb:172:in `connection'

C:/cs/ruby/lib/ruby/gems/1.8/gems/activerecord-1.1.0/lib/active_record/base.
rb:276:in `find_by_sql'

C:/cs/ruby/lib/ruby/gems/1.8/gems/activerecord-1.1.0/lib/active_record/base.
rb:270:in `find_all'

C:/cs/ruby/lib/ruby/gems/1.8/gems/actionpack-0.9.5/lib/action_controller/sca
ffolding.rb:103:in `list'

C:/cs/ruby/lib/ruby/gems/1.8/gems/actionpack-0.9.5/lib/action_controller/sca
ffolding.rb:96:in `index'

C:/cs/ruby/lib/ruby/gems/1.8/gems/actionpack-0.9.5/lib/action_controller/bas
e.rb:577:in `send'

C:/cs/ruby/lib/ruby/gems/1.8/gems/actionpack-0.9.5/lib/action_controller/bas
e.rb:577:in `perform_action_without_filters'

C:/cs/ruby/lib/ruby/gems/1.8/gems/actionpack-0.9.5/lib/action_controller/fil
ters.rb:236:in `perform_action_without_benchmark'

C:/cs/ruby/lib/ruby/gems/1.8/gems/actionpack-0.9.5/lib/action_controller/ben
chmarking.rb:30:in `perform_action_without_rescue'

C:/cs/ruby/lib/ruby/gems/1.8/gems/actionpack-0.9.5/lib/action_controller/ben
chmarking.rb:30:in `measure'

C:/cs/ruby/lib/ruby/gems/1.8/gems/actionpack-0.9.5/lib/action_controller/ben
chmarking.rb:30:in `perform_action_without_rescue'

C:/cs/ruby/lib/ruby/gems/1.8/gems/actionpack-0.9.5/lib/action_controller/res
cue.rb:68:in `perform_action'

C:/cs/ruby/lib/ruby/gems/1.8/gems/actionpack-0.9.5/lib/action_controller/bas
e.rb:254:in `process'

C:/cs/ruby/lib/ruby/gems/1.8/gems/actionpack-0.9.5/lib/action_controller/bas
e.rb:242:in `process'

C:/cs/ruby/lib/ruby/gems/1.8/gems/rails-0.8.5/lib/dispatcher.rb:35:in
`dispatch'
1 Answer

Michael Neumann

11/23/2004 1:36:00 AM

0

Abraham Vionas wrote:
> Hi, I'm (still) working through the Rails Todo List tutorial, and now have
> run up against what I think is an error being thrown by Rails because it
> can't find/connect to my PostgreSQL DB. I have installed Postgres-pr-0.2.1
> and verified that I can connect using it, but I have no idea - beyond the
> configuration of the yaml file - of how to make sure that ActiveRecord can
> connect to my DB fine. The error I get is below in case someone recognizes
> it as being from something other than db connectivity.
>
>
>
> TypeError in Todo#index
>
>
> superclass mismatch for class ParseError

updating to 0.2.2 fixes this.

Regards,

Michael