rake fails; path to sqlite database file problem

Must I create a schema.sql? Given that rails creates the schema when
using mySQL, why create schema.sql?

I have sqlite3 installed but am unsure about what the database.yml should
look like and how the database file is found. I created an empty
database and placed it in straw/db, but that doesn't seem to work.

<http://wiki.rubyonrails.org/rails/pages/HowtoUseSQLite> says to:

sqlite3 ~/databases/rails-app.db < /path/to/schema.sql

However, I never created a .sql file. Can't I just plop straw.db
somewhere and tell database.yml where to find it? This appears to be
what happens in Windows.

For mySQL rails created all tables and schemas. Cannot rails do the same
thing for sqLite?

Here's what I have:

thufir@arrakis ~/rubyCode/straw $
thufir@arrakis ~/rubyCode/straw $ cat db/migrate/001_feeds.rb

class Feeds < ActiveRecord::Migration
        def self.up
                create_table :feeds do |table|
                        table.column :title, :string
                        table.column :location, :string
                        table.column :category_id, :integer
        def self.down
                drop_table :feeds
thufir@arrakis ~/rubyCode/straw $
thufir@arrakis ~/rubyCode/straw $ ll db/straw.db
-rw-r--r-- 1 thufir users 0 Nov 28 22:30 db/straw.db
thufir@arrakis ~/rubyCode/straw $
thufir@arrakis ~/rubyCode/straw $ cat config/database.yml

        adapter: sqlite
        dbfile: /home/thufir/straw/db/straw.db
        adapter: sqlite
        dbfile: /home/thufir/straw/db/straw.db
        adapter: sqlite
        dbfile: /home/thufir/straw/db/straw.db
thufir@arrakis ~/rubyCode/straw $
thufir@arrakis ~/rubyCode/straw $ pwd
thufir@arrakis ~/rubyCode/straw $
thufir@arrakis ~/rubyCode/straw $ rake db:migrate
(in /home/thufir/rubyCode/straw)
rake aborted!
no such file to load -- sqlite

(See full trace by running task with --trace)
thufir@arrakis ~/rubyCode/straw $
thufir@arrakis ~/rubyCode/straw $ eix dev-ruby/sqlite3-ruby
[I] dev-ruby/sqlite3-ruby
     Available versions: 1.1.0 ~1.2.1 {doc swig}
     Installed versions: 1.1.0(21:15:58 11/28/07)(doc)
     Homepage: http://rubyforge.org/projects/sqlite-ruby/
     Description: An extension library to access a SQLite
database from Ruby

thufir@arrakis ~/rubyCode/straw $