Sqlite3-ruby Not Needed for Rails?

Rails
1

I’ve always thought the sqlite3-ruby gem is needed for Rails apps to
use SQLite3 databases, until the other day.

I set up a VM running Ubuntu 9.0.4, 32-bit server edition with Rails
2.2.2 to host an app I had written (by the way, the VM was
surprisingly easier to setup than the Mac it replaced).

I had neglected to install the sqlite3-ruby gem on the VM, which I had
installed on the Mac, but my app runs just fine on the VM anyway.
What gives?

If someone can enlighten me, I’d appreciate it.

Thanks!

2

Your first thought was correct. If you’re using sqlite3 to support
your app’s DB you can’t even do “rake db:migrate” without having
sqlite3-ruby installed. My guess is that the either gem was already
in place or you had a “config.gem ‘sqlite3-ruby’…” line in your
app’s environment.rb and ran “rake gems:install” as part of the app
port to the server.

3

On Sep 19, 7:56 pm, Rick [email protected] wrote:

Your first thought was correct. If you’re using sqlite3 to support
your app’s DB you can’t even do “rake db:migrate” without having
sqlite3-ruby installed. My guess is that the either gem was already
in place or you had a “config.gem ‘sqlite3-ruby’…” line in your
app’s environment.rb and ran “rake gems:install” as part of the app
port to the server.

You need sqlite3-ruby, but it doesn’t have to be installed as a gem.
Linux distros often make ruby libraries available via their own
packaging system, if sqlite3-ruby was installed in that way then you
wouldn’t need the gem on top of that.

Fred