Update Gemfile to use latest bundler config.

railties/lib/generators/rails/app/app_generator.rb

@@ -9,6 +9,8 @@ module Rails::Generators
 
   class AppGenerator < Base
     DATABASES = %w( mysql oracle postgresql sqlite3 frontbase ibm_db )
+
+    attr_accessor :rails_template
     add_shebang_option!
 
     argument :app_path, :type => :string
@@ -90,18 +92,6 @@ def create_boot_file
       template "config/boot.rb"
     end
 
-    def gem_for_database
-      # %w( mysql oracle postgresql sqlite3 frontbase ibm_db )
-      case options[:database]
-      when "mysql"      then "mysql"
-      when "oracle"     then "ruby-oci8"
-      when "postgresql" then "pg"
-      when "sqlite3"    then "sqlite3-ruby"
-      when "frontbase"  then "ruby-frontbase"
-      when "ibm_db"     then "ibm_db"
-      end
-    end
-
     def create_activerecord_files
       return if options[:skip_activerecord]
       template "config/databases/#{options[:database]}.yml", "config/database.yml"
@@ -185,7 +175,10 @@ def bundle_if_dev_or_edge
     end
 
     protected
-      attr_accessor :rails_template
+
+      def self.banner
+        "rails #{self.arguments.map(&:usage).join(' ')} [options]"
+      end
 
       def set_default_accessors!
         self.rails_template = case options[:template]
@@ -230,8 +223,21 @@ def dev_or_edge?
         options.dev? || options.edge?
       end
 
-      def self.banner
-        "#{$0} #{self.arguments.map(&:usage).join(' ')} [options]"
+      def gem_for_database
+        # %w( mysql oracle postgresql sqlite3 frontbase ibm_db )
+        case options[:database]
+        when "oracle"     then "ruby-oci8"
+        when "postgresql" then "pg"
+        when "sqlite3"    then "sqlite3-ruby"
+        when "frontbase"  then "ruby-frontbase"
+        else options[:database]
+        end
+      end
+
+      def require_for_database
+        case options[:database]
+        when "sqlite3" then "sqlite3"
+        end
       end
 
       def mysql_socket

railties/lib/generators/rails/app/templates/Gemfile

@@ -18,17 +18,17 @@ gem "rails", "<%= Rails::VERSION::STRING %>"
 # ActiveRecord requires a database adapter. By default,
 # Rails has selected sqlite3.
 <% end -%>
-gem "<%= gem_for_database %>"
+gem "<%= gem_for_database %>"<% if require_for_database %>, :require => "<%= require_for_database %>"<% end %>
 <% end -%>
 
 ## Bundle the gems you use:
 # gem "bj"
 # gem "hpricot", "0.6"
-# gem "sqlite3-ruby", :require_as => "sqlite3"
-# gem "aws-s3", :require_as => "aws/s3"
+# gem "sqlite3-ruby", :require => "sqlite3"
+# gem "aws-s3", :require => "aws/s3"
 
 ## Bundle gems used only in certain environments:
-# gem "rspec", :only => :test
-# only :test do
+# gem "rspec", :group => :test
+# group :test do
 #   gem "webrat"
 # end

railties/test/generators/app_generator_test.rb

@@ -74,6 +74,13 @@ def test_application_names_are_not_singularized
   def test_config_database_is_added_by_default
     run_generator
     assert_file "config/database.yml", /sqlite3/
+    assert_file "Gemfile", /^gem "sqlite3-ruby", :require => "sqlite3"$/
+  end
+
+  def test_config_another_database
+    run_generator([destination_root, "-d", "mysql"])
+    assert_file "config/database.yml", /mysql/
+    assert_file "Gemfile", /^gem "mysql"$/
   end
 
   def test_config_database_is_not_added_if_skip_activerecord_is_given