Merb Turns 1.0, and Started Driving Me Crazy

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. :)

Comments