Rails + rabl

When we use rails generate scaffold to generate MVC, rails will automatically generate a series of files for us, including how to display the Model View in JSON. By default, your system is a crud system, but we know that restful is not a crud system. Exposing the model directly is not a good choice.

Rabl is a DSL that allows you to easily customize the display information of the generated object GEM: https://github.com/nesquena/rabl

The procedure is as follows:

1. First create a new rails project:

Rails new rabl-app

2. Add the rabl dependency to gemfile:

Gem 'rabl'

3. Create a model:

Rails G model blog title: String Author: String content: Text

4. database migration:

Rake DB: migrate

5. Create a controller:

Create a new empty file blogs_controller.rb under APP/Controllers

The content is as follows:

Class blogscontroller <applicationcontroller
Def Index
@ Blogs = blog. All
End

Def show
@ Blog = blog. Find (Params [: Id])

End
End

Stub data can be used for testing:

@ Blog = blog. new ({: Id => 3,: Title => "Good title",: Author => "Good author",: content => "good content "})

6. Create the view corresponding to rabl:

Create a new empty folder blogs under APP/views:

Create two new files under APP/views: Index. JSON. rabl and show. JSON. rabl.

Show. JSON. rabl:

Object @ blog

Attributes: ID,: title,: Author,: Content

Index. JSON. rabl:

Collection @ blogs

Extends "blogs/Show"

7. Configure route

In routes. RB:

Rails. application. routes. Draw do
Resources: blogs
End

8. Start Server

Rails s

Access: http: // localhost: 3000/blogs/3. JSON

Expected result:

{"blog":{"id":3,"title":"good title","author":"good author","content":"good content"}}

The above example demonstrates how to use rabl in rails. It does not mean that the display method above is a good method for constructing object reality. For more information, see:

Https://github.com/nesquena/rabl

Http://railscasts.com/episodes/322-rabl? View = similar