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Diffstat (limited to 'guides/source/getting_started.md')
| -rw-r--r-- | guides/source/getting_started.md | 80 |
1 files changed, 23 insertions, 57 deletions
diff --git a/guides/source/getting_started.md b/guides/source/getting_started.md index 76556761f7..ceba2c65aa 100644 --- a/guides/source/getting_started.md +++ b/guides/source/getting_started.md @@ -1,8 +1,9 @@ Getting Started with Rails ========================== -This guide covers getting up and running with Ruby on Rails. After reading it, -you should be familiar with: +This guide covers getting up and running with Ruby on Rails. + +After reading this guide, you will know: * Installing Rails, creating a new Rails application, and connecting your application to a database. @@ -12,9 +13,6 @@ you should be familiar with: -------------------------------------------------------------------------------- -WARNING. This Guide is based on Rails 3.2. Some of the code shown here will not -work in earlier versions of Rails. - Guide Assumptions ----------------- @@ -24,7 +22,7 @@ with Rails. However, to get the most out of it, you need to have some prerequisites installed: * The [Ruby](http://www.ruby-lang.org/en/downloads) language version 1.9.3 or higher -* The [RubyGems](http://rubyforge.org/frs/?group_id=126) packaging system +* The [RubyGems](http://rubygems.org/) packaging system * To learn more about RubyGems, please read the [RubyGems User Guide](http://docs.rubygems.org/read/book/1) * A working installation of the [SQLite3 Database](http://www.sqlite.org) @@ -77,11 +75,14 @@ TIP: The examples below use # and $ to denote superuser and regular user termina ### Installing Rails -Open up a command line prompt. On a mac this is called terminal, on windows it is called command prompt. Any commands prefaced with a dollar sign `$` should be run in the command line. Verify sure you have a current version of Ruby installed: +Open up a command line prompt. On Mac OS X open Terminal.app, on Windows choose +"Run" from your Start menu and type 'cmd.exe'. Any commands prefaced with a +dollar sign `$` should be run in the command line. Verify sure you have a +current version of Ruby installed: ```bash $ ruby -v -ruby 1.9.3p194 +ruby 1.9.3p327 ``` To install Rails, use the `gem install` command provided by RubyGems: @@ -100,7 +101,7 @@ To verify that you have everything installed correctly, you should be able to ru $ rails --version ``` -If it says something like "Rails 3.2.8" you are ready to continue. +If it says something like "Rails 3.2.9" you are ready to continue. ### Creating the Blog Application @@ -165,7 +166,7 @@ This will fire up WEBrick, a webserver built into Ruby by default. To see your a  -TIP: To stop the web server, hit Ctrl+C in the terminal window where it's running. To verify the server has stopped you should see your command prompt cursor again. For most unix like systems including mac this will be a dollar sign `$`. In development mode, Rails does not generally require you to restart the server; changes you make in files will be automatically picked up by the server. +TIP: To stop the web server, hit Ctrl+C in the terminal window where it's running. To verify the server has stopped you should see your command prompt cursor again. For most UNIX-like systems including Mac OS X this will be a dollar sign `$`. In development mode, Rails does not generally require you to restart the server; changes you make in files will be automatically picked up by the server. The "Welcome Aboard" page is the _smoke test_ for a new Rails application: it makes sure that you have your software configured correctly enough to serve a page. You can also click on the _About your application’s environment_ link to see a summary of your application's environment. @@ -702,19 +703,6 @@ your Rails models for free, including basic database CRUD (Create, Read, Update, Destroy) operations, data validation, as well as sophisticated search support and the ability to relate multiple models to one another. -Rails includes methods to help you secure some of your model fields. -Open the `app/models/post.rb` file and edit it: - -```ruby -class Post < ActiveRecord::Base - attr_accessible :text, :title -end -``` - -This change will ensure that all changes made through HTML forms can edit the content of the text and title fields. -It will not be possible to define any other field value through forms. You can still define them by calling the `field=` method of course. -Accessible attributes and the mass assignment problem is covered in details in the [Security guide](security.html#mass-assignment) - ### Adding Some Validation Rails includes methods to help you validate the data that you send to models. @@ -722,8 +710,6 @@ Open the `app/models/post.rb` file and edit it: ```ruby class Post < ActiveRecord::Base - attr_accessible :text, :title - validates :title, presence: true, length: { minimum: 5 } end @@ -960,35 +946,14 @@ And here's how our app looks so far: ### Using partials to clean up duplication in views -`partials` are what Rails uses to remove duplication in views. Here's a -simple example: - -```html+erb -# app/views/user/show.html.erb - -<h1><%= @user.name %></h1> - -<%= render 'user_details' %> - -# app/views/user/_user_details.html.erb - -<%= @user.location %> - -<%= @user.about_me %> -``` - -The `users/show` template will automatically include the content of the -`users/_user_details` template. Note that partials are prefixed by an underscore, -as to not be confused with regular views. However, you don't include the -underscore when including them with the `helper` method. +Our `edit` page looks very similar to the `new` page, in fact they +both share the same code for displaying the form. Let's remove some duplication +by using a view partial. By convention, partial files are prefixed by an +underscore. TIP: You can read more about partials in the [Layouts and Rendering in Rails](layouts_and_rendering.html) guide. -Our `edit` action looks very similar to the `new` action, in fact they -both share the same code for displaying the form. Let's clean them up by -using a partial. - Create a new file `app/views/posts/_form.html.erb` with the following content: @@ -1150,7 +1115,8 @@ together. <td><%= post.text %></td> <td><%= link_to 'Show', action: :show, id: post.id %></td> <td><%= link_to 'Edit', action: :edit, id: post.id %></td> - <td><%= link_to 'Destroy', { action: :destroy, id: post.id }, method: :delete, data: { confirm: 'Are you sure?' } %></td> + <td><%= link_to 'Destroy', { action: :destroy, id: post.id }, + method: :delete, data: { confirm: 'Are you sure?' } %></td> </tr> <% end %> </table> @@ -1255,7 +1221,6 @@ First, take a look at `comment.rb`: ```ruby class Comment < ActiveRecord::Base belongs_to :post - attr_accessible :body, :commenter end ``` @@ -1312,7 +1277,7 @@ this way: * One post can have many comments. In fact, this is very close to the syntax that Rails uses to declare this -association. You've already seen the line of code inside the Comment model that +association. You've already seen the line of code inside the `Comment` model that makes each comment belong to a Post: ```ruby @@ -1325,10 +1290,10 @@ You'll need to edit the `post.rb` file to add the other side of the association: ```ruby class Post < ActiveRecord::Base + has_many :comments validates :title, presence: true, length: { minimum: 5 } - - has_many :comments + [...] end ``` @@ -1428,7 +1393,7 @@ class CommentsController < ApplicationController def create @post = Post.find(params[:post_id]) @comment = @post.comments.create(params[:comment]) - redirect_to post_url(@post) + redirect_to post_path(@post) end end ``` @@ -1679,9 +1644,10 @@ model, `app/models/post.rb`, as follows: ```ruby class Post < ActiveRecord::Base + has_many :comments, dependent: :destroy validates :title, presence: true, length: { minimum: 5 } - has_many :comments, dependent: :destroy + [...] end ``` |