Using custom column type in Rails migrations

It seems if the type you gave to a column definition in a migration is not listed in native_database_types, Rails will just use what you gave it.

Therefore this will work:

Obi-Wan vs Yoda

I just realized this the other night while watching The Amazing Race though it seems to have been talked about since Episode 3 was released.

Obi-Wan:
Only a Sith deal in absolutes

Yoda:
Do, or do not. There is no try.

Rubyforge gem problem

Problem:

starting the server and you get:

 can't activate rubyforge (= 0.4.5), already activated rubyforge-1.0.0] (Gem::Exception)

Solution:
remove old versions of rubyforge gem

jorrel@helen ~ $ sudo gem uninstall rubyforge

Select gem to uninstall:
1. rubyforge-0.4.4
2. rubyforge-0.4.5
3. rubyforge-1.0.0
4. All versions
> 1
Successfully uninstalled rubyforge-0.4.4
jorrel@helen ~ $ sudo gem uninstall rubyforge

Select gem to uninstall:
1. rubyforge-0.4.5
2. rubyforge-1.0.0
3. All versions
> 1
Successfully uninstalled rubyforge-0.4.5
jorrel@helen ~ $ gem list | grep rubyforge
rubyforge (1.0.0)

Undo uncommitted changes in git

It seems that 'git revert' does not work the way that 'svn revert' does (reverting all uncommitted changes). I don't know if this is the proper way, but I 'reverted' my changes using 'git stash':

git stash
git stash clear

Update:

git reset --hard

Ubuntu Hardy + Firefox + Firebug

The old firebug is not working for firefox 3 beta 5 in Ubuntu Hardy; and so firebug 1.1 from the official site.

Solution: get the 'firebug' package from apt. :)

mod_rails + edge rails

Based on a recent conversation at phusion passenger google group, there is a bug wherein mod_rails fails to start its spawner for an application that uses edge rails.

Basically, you'll get this error (complaining about a failed 'to_constant_name' somewhere):

  Framework that failed to load:
  Vendor directory: /path/to/vendor/rails
Error message:
  Anonymous modules have no name to be referenced by
Exception class:
  ArgumentError

More info about the bug can be found in the bug report filed by hongli


update: This seems to be fixed in edge rails + git passenger (though I havn't tried yet), as hongli's comment below says.

mod_rails + rails 2.0

I you encounter a "500 Internal Server Error" after setting up mod_rails in a recent (rails 2.0) application, you need to delete 'public/.htaccess'.