Rails - Jul 2006 - rescue_action_in_public useless to capture low level errors

Hi all,

I''m trying to make for nicer system error handling, with the help of
    rescue_action_in_public
(see Recipe 47, in ''Rails Recipes'')


PROBLEM:
While it lets me capture an incorrect db name in database.yml (for 
example),
with lower level errors like when the DB server is just down, I still 
get the default system error screen for MySQL::ERROR :

   Can''t connect to local MySQL server through socket
''/tmp/mysql.sock''
(2)
   RAILS_ROOT: xxx/test_recover/public/../config/..

and the ugly stack trace (see end of message)

QUESTION:
Is there anything I can do to capture and handle low levers errors like 
this one?

Thanks in advance.

Alain Ravet






Error screen contents:

   Can''t connect to local MySQL server through socket
''/tmp/mysql.sock''
(2)
   RAILS_ROOT: xxx/test_recover/public/../config/..


/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/connection_adapters/mysql_adapter.rb:331:in
`real_connect''
/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/connection_adapters/mysql_adapter.rb:331:in
`connect''
/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/connection_adapters/mysql_adapter.rb:165:in
`reconnect!''
/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/connection_adapters/abstract_adapter.rb:85:in
`verify!''
/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/connection_adapters/abstract/connection_specification.rb:99:in
`verify_active_connections!''
/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/connection_adapters/abstract/connection_specification.rb:98:in
`verify_active_connections!''
/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/dispatcher.rb:70:in
`prepare_application''
/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/dispatcher.rb:37:in
`dispatch''
/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/fcgi_handler.rb:150:in
`process_request''
/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/fcgi_handler.rb:54:in
`process!''
/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/fcgi-0.8.6.1/fcgi.rb:600:in
`each_cgi''
/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/fcgi-0.8.6.1/fcgi.rb:597:in
`each_cgi''
/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/fcgi_handler.rb:53:in
`process!''
/Applications/__my/__dev/Locomotive2/Bundles/rails112.locobundle/powerpc/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/fcgi_handler.rb:23:in
`process!''
/Users/aravet/test_recover/public/dispatch.fcgi:24

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