Merb turns 1.0, and started driving me crazy
Filed Under (Merb, Ruby) by Leonardo Borges on 18-11-2008
As you may already know, Merb turned 1.0 a while ago and I decided to resume my studies to learn the framework.
So I just built a new app with a few resources and fired the migration scripts:
$ rake db:automigrate
And this is what I got:
Loading init file from /Users/leo/projects/merb/my-first-app/config/init.rb Loading /Users/leo/projects/merb/my-first-app/config/environments/development.rb ~ Connecting to database... /opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core/adapters/data_objects_adapter.rb:137:in `initialize': wrong number of arguments (8 for 1) (ArgumentError) from /opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core/adapters/data_objects_adapter.rb:137:in `new' from /opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core/adapters/data_objects_adapter.rb:137:in `normalize_uri' from /opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core/adapters/abstract_adapter.rb:44:in `initialize' from /opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core/adapters/data_objects_adapter.rb:159:in `initialize' from /opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core.rb:157:in `new' from /opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core.rb:157:in `setup' from /opt/local/lib/ruby/gems/1.8/gems/merb_datamapper-1.0/lib/merb/orms/data_mapper/connection.rb:44:in `setup_connections' from /opt/local/lib/ruby/gems/1.8/gems/merb_datamapper-1.0/lib/merb/orms/data_mapper/connection.rb:27:in `connect' from /opt/local/lib/ruby/gems/1.8/gems/merb_datamapper-1.0/lib/merb_datamapper.rb:17:in `run' from /opt/local/lib/ruby/gems/1.8/gems/merb-core-1.0/lib/merb-core/bootloader.rb:99:in `run' from /opt/local/lib/ruby/gems/1.8/gems/merb-core-1.0/lib/merb-core/server.rb:172:in `bootup' from /opt/local/lib/ruby/gems/1.8/gems/merb-core-1.0/lib/merb-core/server.rb:42:in `start' from /opt/local/lib/ruby/gems/1.8/gems/merb-core-1.0/lib/merb-core.rb:169:in `start' from /opt/local/lib/ruby/gems/1.8/gems/merb-core-1.0/bin/merb:11 from /opt/local/bin/merb:19:in `load' from /opt/local/bin/merb:19
Lovely, isn’t it?
After a fair amount of googling around it turns out that there seems to be a problem with the URI parser Merb uses underneath, called Addressable.
As of the installation of Merb 1.0, the installed version of this library was 2.0.0.
The solution? Install a older Addressable version:
$ sudo gem uninstall addressable You have requested to uninstall the gem: addressable-2.0.0 dm-core-0.9.6 depends on [addressable (>= 1.0.4)] data_objects-0.9.6 depends on [addressable (>= 1.0.3)] If you remove this gems, one or more dependencies will not be met. Continue with Uninstall? [Yn] Y Successfully uninstalled addressable-2.0.0 $ sudo gem install addressable -v 1.0.4 Successfully installed addressable-1.0.4 1 gem installed Installing ri documentation for addressable-1.0.4... Installing RDoc documentation for addressable-1.0.4...
I haven’t figured out the reason for this issue, so please do share if you know. I’ll be glad to update the post. 
