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Diffstat (limited to 'guides/source/getting_started.md')
| -rw-r--r-- | guides/source/getting_started.md | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/guides/source/getting_started.md b/guides/source/getting_started.md index e5bc5ef038..2f322d15da 100644 --- a/guides/source/getting_started.md +++ b/guides/source/getting_started.md @@ -22,8 +22,8 @@ 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 newer -* 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) +* The [RubyGems](http://rubygems.org) packaging system + * To learn more about RubyGems, please read the [RubyGems Guides](http://guides.rubygems.org) * A working installation of the [SQLite3 Database](http://www.sqlite.org) Rails is a web application framework running on the Ruby programming language. @@ -262,7 +262,7 @@ of code: ### Setting the Application Home Page Now that we have made the controller and view, we need to tell Rails when we -want Hello Rails! to show up. In our case, we want it to show up when we +want `Hello, Rails!` to show up. In our case, we want it to show up when we navigate to the root URL of our site, <http://localhost:3000>. At the moment, "Welcome Aboard" is occupying that spot. @@ -522,6 +522,7 @@ Edit the `form_for` line inside `app/views/posts/new.html.erb` to look like this In this example, the `posts_path` helper is passed to the `:url` option. To see what Rails will do with this, we look back at the output of `rake routes`: + ```bash $ rake routes Prefix Verb URI Pattern Controller#Action @@ -535,6 +536,7 @@ edit_post GET /posts/:id/edit(.:format) posts#edit DELETE /posts/:id(.:format) posts#destroy root / welcome#index ``` + The `posts_path` helper tells Rails to point the form to the URI Pattern associated with the `posts` prefix; and the form will (by default) send a `POST` request @@ -687,7 +689,7 @@ invoking the command: `rake db:migrate RAILS_ENV=production`. ### Saving data in the controller -Back in `posts_controller`, we need to change the `create` action +Back in `PostsController`, we need to change the `create` action to use the new `Post` model to save the data in the database. Open `app/controllers/posts_controller.rb` and change the `create` action to look like this: @@ -806,7 +808,7 @@ The route for this as per output of `rake routes` is: posts GET /posts(.:format) posts#index ``` -And an action for that route inside the `PostsController` in the `app/controllers/posts_controller.rb` file: +Add the corresponding `index` action for that route inside the `PostsController` in the `app/controllers/posts_controller.rb` file: ```ruby def index @@ -846,7 +848,7 @@ Open `app/views/welcome/index.html.erb` and modify it as follows: ```html+erb <h1>Hello, Rails!</h1> -<%= link_to "My Blog", controller: "posts" %> +<%= link_to 'My Blog', controller: 'posts' %> ``` The `link_to` method is one of Rails' built-in view helpers. It creates a @@ -1013,7 +1015,7 @@ errors with `@post.errors.full_messages`. arguments. If the number is greater than one, the string will be automatically pluralized. -The reason why we added `@post = Post.new` in `posts_controller` is that +The reason why we added `@post = Post.new` in the `PostsController` is that otherwise `@post` would be `nil` in our view, and calling `@post.errors.any?` would throw an error. @@ -1031,7 +1033,7 @@ attempt to do just that on the new post form [(http://localhost:3000/posts/new)] We've covered the "CR" part of CRUD. Now let's focus on the "U" part, updating posts. -The first step we'll take is adding an `edit` action to `posts_controller`. +The first step we'll take is adding an `edit` action to the `PostsController`. ```ruby def edit @@ -1132,7 +1134,7 @@ appear next to the "Show" link: <tr> <td><%= post.title %></td> <td><%= post.text %></td> - <td><%= link_to 'Show', post %></td> + <td><%= link_to 'Show', post_path(post) %></td> <td><%= link_to 'Edit', edit_post_path(post) %></td> </tr> <% end %> @@ -1338,7 +1340,7 @@ class Comment < ActiveRecord::Base end ``` -This is very similar to the `post.rb` model that you saw earlier. The difference +This is very similar to the `Post` model that you saw earlier. The difference is the line `belongs_to :post`, which sets up an Active Record _association_. You'll learn a little about associations in the next section of this guide. @@ -1488,8 +1490,8 @@ So first, we'll wire up the Post show template </p> <% end %> -<%= link_to 'Edit Post', edit_post_path(@post) %> | -<%= link_to 'Back to Posts', posts_path %> +<%= link_to 'Back', posts_path %> +| <%= link_to 'Edit', edit_post_path(@post) %> ``` This adds a form on the `Post` show page that creates a new comment by @@ -1816,6 +1818,7 @@ class CommentsController < ApplicationController @post = Post.find(params[:post_id]) ... end + # snipped for brevity ``` |