1.1 link_to
一般形式：
link_to "xxxx",{hash},{hash}
第一个是链接文字,第二个hash和url_for的一样,第三个hash是用户自己在<a>中添加的标签,比如：
<%= link_to "Issues", {:controller => "issue", :action => "index"}, {:title => "Issues"} %>
link_to_unless_current 自动识别当前链接, 如果当前url和链接一样, 就只产生文本
事实上，html元素的属性都可以通过这样的方式来设置。比如添加一个click事件处理：
<%= link_to "Issues", {:controller => "issue", :action => "index"}, {:onclick => "alert(1)"} %>
<%= link_to "Issues", "index", {:onclick => "alert(1)"} %>
显示结果："/xxxxx/controller/index?onclick=alert(1)"
所以如果第二个参数以字符串的形式给出，此时其后的参数，就变为queryString了。那么如何实现又增加 click 事件处理，又增加url参数呢，很简单, 如下：
<%= link_to "Issues", {:controller => "issue", :action => "index", :param=value}, :onclick => "alert(1)" %>
结果为：
<a href="/issue/index?param=value" script_onclick="alert(1)">Issues</a>
rake db:fixtures:load
# 载入fixtures到当前环境的数据库
# 载入指定的fixtures使用FIXTURES=x,y
rake db:migrate
# 迁移数据库通过在db/migrate目录下的脚本.可以指定版本号通过VERSION=x
rake db:schema:dump
# 创建一个db/schema.rb文件，通过AR能过够支持任何数据库去使用
rake db:schema:load
# 再入一个schema.rb文件进数据库
rake db:sessions:clear
# 清空sessions表
rake db:sessions:create
# 用CGI::Session::ActiveRecordStore创建一个sessions表为用户
rake db:structure:dump
# 导出数据库结构为一个SQL文件
rake db:test:clone
# 重新创建一个测试数据库从当前环境数据库中
rake db:test:clone_structure
# 重新创建测试数据库从开发模式数据库
rake db:test:prepare
# 准备测试数据库并在入schema
rake db:test:purge
# 清空测试数据库
rake doc:app
# 创建HTML文件的API Documentation
rake doc:clobber_app
# 删除Documentation
rake doc:clobber_plugins
# 删除 plugin Documentation
rake doc:clobber_rails
# 删除Documentation
rake doc:plugins
# 产生Documation为所有安装的plugins
rake doc:rails
# 创建HTML文件的API Documentation
rake doc:reapp
# 强制重新创建HTML文件的API Documentation
rake doc:rerails
# 强制重新创建HTML文件的API Documentation
rake log:clear
# 清空目录log/下的所有日志文件
rake rails:freeze:edge
# Lock this application to latest Edge Rails. Lock a specific revision with REVISION=X
rake rails:freeze:gems
# Lock this application to the current gems (by unpacking them into vendor/rails)
rake rails:unfreeze
# Unlock this application from freeze of gems or edge and return to a fluid use of system gems
rake rails:update
# Update both scripts and public/javascripts from Rails
rake rails:update:javascripts
# Update your javascripts from your current rails install
rake rails:update:scripts
# Add new scripts to the application script/ directory
rake stats
# Report code statistics (KLOCs, etc) from the application
rake test
# Test all units and functionals
rake test:functionals
# Run tests for functionalsdb:test:prepare
rake test:integration
# Run tests for integrationdb:test:prepare
rake test:plugins
# Run tests for pluginsenvironment
rake test:recent
# Run tests for recentdb:test:prepare
rake test:uncommitted
# Run tests for uncommitteddb:test:prepare
rake test:units
# Run tests for unitsdb:test:prepare
rake tmp:cache:clear
# 清空tmp/cache目录下的所有文件
rake tmp:clear
# 清空session, cache, 和socket文件从tmp/目录
rake tmp:create
# 为sessions, cache, and sockets创建tmp/目录
rake tmp:sessions:clear
# 清空所有在tmp/sessions目录下的文件
rake tmp:sockets:clear
# 清空所有在tmp/sessions 目录下的ruby_sess.* 文件
1.3 Scripts
script/about
# 输出当前环境信息
script/breakpointer
# 启动断点server
script/console
# 启动交换式的Rails控制台
script/destroy
# 删除通过generators创建的文件
script/generate
# -> generators
script/plugin
# -> Plugins
script/runner
# 执行一个任务在rails上下文中
script/server
# 启动开发模式服务器http://localhost:3000
//以下几个不知道怎么去使用
script/performance/profiler
script/performance/benchmarker
script/process/reaper
script/process/spawner
1.4 Generators
ruby script/generate model ModelName
ruby script/generate controller ListController show edit
ruby script/generate scaffold ModelName ControllerName
ruby script/generate migration AddNewTable
ruby script/generate plugin PluginName
ruby script/generate mailer Notification lost_password signup
ruby script/generate web_service ServiceName api_one api_two
ruby script/generate integration_test TestName
ruby script/generate session_migration
可选项:
-p, --pretend Run but do not make any changes.
-f, --force Overwrite files that already exist.
-s, --skip Skip files that already exist.
-q, --quiet Suppress normal output.
-t, --backtrace Debugging: show backtrace on errors.
-h, --help Show this help message.
-c, --svn Modify files with subversion. (Note: svn must be in path)
1.5 Plugins
script/plugin discover
# discover plugin repositories
script/plugin list
# list all available plugins
script/plugin install where
# install the a€wherea€? plugin
script/plugin install -x where
# install where plugin as SVN external
script/plugin install http://invisible.ch/projects/plugins/where
script/plugin update
# update installed plugins
script/plugin source
# add a source repository
script/plugin unsource
# removes a source repository
script/plugin sources
# lists source repositories