rails -h 查看帮助
Usage: rails new APP_PATH [options] Options: -r, [--ruby=PATH] # Path to the Ruby binary of your choice # Default: D:/Rails/Ruby1.9.3/bin/ruby.exe -b, [--builder=BUILDER] # Path to a application builder (can be a files ystem path or URL) -m, [--template=TEMPLATE] # Path to an application template (can be a fil esystem path or URL) [--skip-gemfile] # Don't create a Gemfile [--skip-bundle] # Don't run bundle install -G, [--skip-git] # Skip Git ignores and keeps -O, [--skip-active-record] # Skip Active Record files -S, [--skip-sprockets] # Skip Sprockets files -d, [--database=DATABASE] # Preconfigure for selected database (options: mysql/oracle/postgresql/sqlite3/frontbase/ibm_db/sqlserver/jdbcmysql/jdbcsqlite3 /jdbcpostgresql/jdbc) # Default: sqlite3 -j, [--javascript=JAVASCRIPT] # Preconfigure for selected JavaScript library # Default: jquery -J, [--skip-javascript] # Skip JavaScript files [--dev] # Setup the application with Gemfile pointing t o your Rails checkout [--edge] # Setup the application with Gemfile pointing t o Rails repository -T, [--skip-test-unit] # Skip Test::Unit files [--old-style-hash] # Force using old style hash (:foo => 'bar') on Ruby >= 1.9 Runtime options: -f, [--force] # Overwrite files that already exist -p, [--pretend] # Run but do not make any changes -q, [--quiet] # Supress status output -s, [--skip] # Skip files that already exist Rails options: -h, [--help] # Show this help message and quit -v, [--version] # Show Rails version number and quit Description: The 'rails new' command creates a new Rails application with a default directory structure and configuration at the path you specify. You can specify extra command-line arguments to be used every time 'rails new' runs in the .railsrc configuration file in your home directory. Note that the arguments specified in the .railsrc file don't affect the defaults values shown above in this help message. Example: rails new ~/Code/Ruby/weblog This generates a skeletal Rails installation in ~/Code/Ruby/weblog. See the README in the newly created application to get going.
不要说没有文档，文档都在指令里面
rails --help
The most common rails commands are: generate Generate new code (short-cut alias: "g") console Start the Rails console (short-cut alias: "c") server Start the Rails server (short-cut alias: "s") dbconsole Start a console for the database specified in config/database.yml (short-cut alias: "db") new Create a new Rails application. "rails new my_app" creates a new application called MyApp in "./my_app" In addition to those, there are: application Generate the Rails application code destroy Undo code generated with "generate" (short-cut alias: "d") benchmarker See how fast a piece of code runs profiler Get profile information from a piece of code plugin Install a plugin runner Run a piece of code in the application environment (short-cut alia s: "r") All commands can be run with -h (or --help) for more information.
还有些帮助文档在项目当中
README.rdoc
这里的内容更详细
== Welcome to Rails Rails is a web-application framework that includes everything needed to create database-backed web applications according to the Model-View-Control pattern. This pattern splits the view (also called the presentation) into "dumb" templates that are primarily responsible for inserting pre-built data in between HTML tags. The model contains the "smart" domain objects (such as Account, Product, Person, Post) that holds all the business logic and knows how to persist themselves to a database. The controller handles the incoming requests (such as Save New Account, Update Product, Show Post) by manipulating the model and directing data to the view. In Rails, the model is handled by what's called an object-relational mapping layer entitled Active Record. This layer allows you to present the data from database rows as objects and embellish these data objects with business logic methods. You can read more about Active Record in link:files/vendor/rails/activerecord/README.html. The controller and view are handled by the Action Pack, which handles both layers by its two parts: Action View and Action Controller. These two layers are bundled in a single package due to their heavy interdependence. This is unlike the relationship between the Active Record and Action Pack that is much more separate. Each of these packages can be used independently outside of Rails. You can read more about Action Pack in link:files/vendor/rails/actionpack/README.html. == Getting Started 1. At the command prompt, create a new Rails application: <tt>rails new myapp</tt> (where <tt>myapp</tt> is the application name) 2. Change directory to <tt>myapp</tt> and start the web server: <tt>cd myapp; rails server</tt> (run with --help for options) 3. Go to http://localhost:3000/ and you'll see: "Welcome aboard: You're riding Ruby on Rails!" 4. Follow the guidelines to start developing your application. You can find the following resources handy: * The Getting Started Guide: http://guides.rubyonrails.org/getting_started.html * Ruby on Rails Tutorial Book: http://www.railstutorial.org/ == Debugging Rails Sometimes your application goes wrong. Fortunately there are a lot of tools that will help you debug it and get it back on the rails. First area to check is the application log files. Have "tail -f" commands running on the server.log and development.log. Rails will automatically display debugging and runtime information to these files. Debugging info will also be shown in the browser on requests from 127.0.0.1. You can also log your own messages directly into the log file from your code using the Ruby logger class from inside your controllers. Example: class WeblogController < ActionController::Base def destroy @weblog = Weblog.find(params[:id]) @weblog.destroy logger.info("#{Time.now} Destroyed Weblog ID ##{@weblog.id}!") end end The result will be a message in your log file along the lines of: Mon Oct 08 14:22:29 +1000 2007 Destroyed Weblog ID #1! More information on how to use the logger is at http://www.ruby-doc.org/core/ Also, Ruby documentation can be found at http://www.ruby-lang.org/. There are several books available online as well: * Programming Ruby: http://www.ruby-doc.org/docs/ProgrammingRuby/ (Pickaxe) * Learn to Program: http://pine.fm/LearnToProgram/ (a beginners guide) These two books will bring you up to speed on the Ruby language and also on programming in general. == Debugger Debugger support is available through the debugger command when you start your Mongrel or WEBrick server with --debugger. This means that you can break out of execution at any point in the code, investigate and change the model, and then, resume execution! You need to install ruby-debug to run the server in debugging mode. With gems, use <tt>sudo gem install ruby-debug</tt>. Example: class WeblogController < ActionController::Base def index @posts = Post.all debugger end end So the controller will accept the action, run the first line, then present you with a IRB prompt in the server window. Here you can do things like: >> @posts.inspect => "[#<Post:0x14a6be8 @attributes={"title"=>nil, "body"=>nil, "id"=>"1"}>, #<Post:0x14a6620 @attributes={"title"=>"Rails", "body"=>"Only ten..", "id"=>"2"}>]" >> @posts.first.title = "hello from a debugger" => "hello from a debugger" ...and even better, you can examine how your runtime objects actually work: >> f = @posts.first => #<Post:0x13630c4 @attributes={"title"=>nil, "body"=>nil, "id"=>"1"}> >> f. Display all 152 possibilities? (y or n) Finally, when you're ready to resume execution, you can enter "cont". == Console The console is a Ruby shell, which allows you to interact with your application's domain model. Here you'll have all parts of the application configured, just like it is when the application is running. You can inspect domain models, change values, and save to the database. Starting the script without arguments will launch it in the development environment. To start the console, run <tt>rails console</tt> from the application directory. Options: * Passing the <tt>-s, --sandbox</tt> argument will rollback any modifications made to the database. * Passing an environment name as an argument will load the corresponding environment. Example: <tt>rails console production</tt>. To reload your controllers and models after launching the console run <tt>reload!</tt> More information about irb can be found at: link:http://www.rubycentral.org/pickaxe/irb.html == dbconsole You can go to the command line of your database directly through <tt>rails dbconsole</tt>. You would be connected to the database with the credentials defined in database.yml. Starting the script without arguments will connect you to the development database. Passing an argument will connect you to a different database, like <tt>rails dbconsole production</tt>. Currently works for MySQL, PostgreSQL and SQLite 3. == Description of Contents The default directory structure of a generated Ruby on Rails application: |-- app | |-- assets | |-- images | |-- javascripts | `-- stylesheets | |-- controllers | |-- helpers | |-- mailers | |-- models | `-- views | `-- layouts |-- config | |-- environments | |-- initializers | `-- locales |-- db |-- doc |-- lib | `-- tasks |-- log |-- public |-- script |-- test | |-- fixtures | |-- functional | |-- integration | |-- performance | `-- unit |-- tmp | |-- cache | |-- pids | |-- sessions | `-- sockets `-- vendor |-- assets `-- stylesheets `-- plugins app Holds all the code that's specific to this particular application. app/assets Contains subdirectories for images, stylesheets, and JavaScript files. app/controllers Holds controllers that should be named like weblogs_controller.rb for automated URL mapping. All controllers should descend from ApplicationController which itself descends from ActionController::Base. app/models Holds models that should be named like post.rb. Models descend from ActiveRecord::Base by default. app/views Holds the template files for the view that should be named like weblogs/index.html.erb for the WeblogsController#index action. All views use eRuby syntax by default. app/views/layouts Holds the template files for layouts to be used with views. This models the common header/footer method of wrapping views. In your views, define a layout using the <tt>layout :default</tt> and create a file named default.html.erb. Inside default.html.erb, call <% yield %> to render the view using this layout. app/helpers Holds view helpers that should be named like weblogs_helper.rb. These are generated for you automatically when using generators for controllers. Helpers can be used to wrap functionality for your views into methods. config Configuration files for the Rails environment, the routing map, the database, and other dependencies. db Contains the database schema in schema.rb. db/migrate contains all the sequence of Migrations for your schema. doc This directory is where your application documentation will be stored when generated using <tt>rake doc:app</tt> lib Application specific libraries. Basically, any kind of custom code that doesn't belong under controllers, models, or helpers. This directory is in the load path. public The directory available for the web server. Also contains the dispatchers and the default HTML files. This should be set as the DOCUMENT_ROOT of your web server. script Helper scripts for automation and generation. test Unit and functional tests along with fixtures. When using the rails generate command, template test files will be generated for you and placed in this directory. vendor External libraries that the application depends on. Also includes the plugins subdirectory. If the app has frozen rails, those gems also go here, under vendor/rails/. This directory is in the load path.
我就根据这些帮助文档，以及网络上的帮助文档，尝试跑通第一个rails。
具体的帮助，请参考
http://guides.ruby.tw/rails3/getting_started.html
遇到的问题：
1.ruby与rails版本不匹配。
解决：下载RailsInstaller直接安装。
2.新建项目rails new demo，会在bundle install卡住很久。
解决：
rails new my_app --skip-bundle cd my_app bundle install --local
gem install bundler --pre
3.不知道怎么开启服务。
解决：
查看文档
发现到项目目录下dos中，开启rails server即可。
完了到浏览器中输入，localhost:3000就可以看到ruby程序跑通了。
截图如下：
