Question

I got ruby 1.8.7 (native compiled), rails 2.3.4, OSX 10.6.2 and also sqlite3-ruby.

The error I’m getting when accessing the rails app is

NameError: uninitialized constant SQLite3::Driver::Native::Driver::API

History:
I upgraded to snow leopard by migrating my apps with a FW-cable from my old macbook to the new one. Everything was running perfectly for months, but Yesterday I needed to install watir, which was dependant on rb-appscript, which didn’t build due a “wrong architecture” error in libsqlite3.dylib. I figured the build was made on the old machine, so i wanted to rebuild sqlite3-ruby:

$ sudo gem uninstall sqlite3-ruby

$ sudo gem install sqlite3-ruby

Building native extensions. This could take a while…
ERROR: Error installing sqlite3-ruby:
ERROR: Failed to build gem native extension.

/usr/local/bin/ruby extconf.rb
checking for fdatasync() in -lrt… no
checking for sqlite3.h… yes
checking for sqlite3_open() in -lsqlite3… no
* extconf.rb failed *
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers. Check the mkmf.log file for more
details. You may need configuration options.

It seems like the sqlite3 libs are not working properly. I’ve tried to install macports sqlite3 (sudo port install sqlite3) and use that instead, but with same result… so i rebuild sqlite3 from scratch.. download->configure->make->make install. After that, the gem now builds perfectly, but doesn’t work in rails, giving the error in the top of this article.

I’m not really sure where to go from here because I’ve tried the following

1. Rebuild sqlite3 from newest source (http://www.sqlite.org/download.html)
2. Reinstalled sqlite3-ruby (sudo gem uninstall sqlite3-ruby && sudo gem install sqlite3-ruby)
3. Used sqlite3 from macports (sudo port install sqlite3 && sudo gem install sqlite3-ruby)
4. Reinstalled rails (sudo gem install rails sqlite3-ruby ) and updated environment.rb to rails 2.3.5.

No avail, I still get this error:

NameError: uninitialized constant SQLite3::Driver::Native::Driver::AP
from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:105:in const_missing'
from /usr/local/lib/ruby/gems/1.8/gems/sqlite3-ruby-1.2.5/lib/sqlite3/driver/native/driver.rb:76:inopen’
from /usr/local/lib/ruby/gems/1.8/gems/sqlite3-ruby-1.2.5/lib/sqlite3/database.rb:76:in `initialize’

Btw, I have Xcode installed from the Snow Leopard CD.

What can i do to solve the problem?

Answer 1

Thanks for the answers. Here is what i did to solve the problem:

1. Complete reinstall of ruby1.8.7 to /usr/local, see here: http://hivelogic.com/articles/ruby-rails-leopard

   Note: readline wasn’t working when recompiling ruby on my mac, so i had to build that too from scratch and make sure to add the –with-readline-dir option to configure:

   ./configure –enable-shared –enable-pthread CFLAGS=-D_XOPEN_SOURCE=1 –prefix=/usr/local –with-readline-dir=/usr/local

2. Complete reinstall of sqlite3 to /usr/local

3. Rebuild all gems on the system with sudo gem install XXX, including sqlite3-ruby. This is only necessary with platform specific gems, but i found it to be faster just to install everything in a oneliner:

   sudo gem install gem1 gem2 … gemN –no-ri –no-rdoc

I tried to go with ruby1.9 but everything stopped working due to broken dependencies in gems and plugins, so I wouldn’t recommend switching to 1.9 unless you are up for some heavy debugging and know how to restore your old system!

Finally everything is running again!