active_model_serializers/docs/general/getting_started.md
2015-07-16 10:18:04 -04:00

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# Getting Started
## Installation
### ActiveModel::Serializer is already included on Rails >= 5
Add this line to your application's Gemfile:
```
gem 'active_model_serializers'
```
And then execute:
```
$ bundle
```
## Creating a Serializer
The easiest way to create a new serializer is to generate a new resource, which
will generate a serializer at the same time:
```
$ rails g resource post title:string body:string
```
This will generate a serializer in `app/serializers/post_serializer.rb` for
your new model. You can also generate a serializer for an existing model with
the serializer generator:
```
$ rails g serializer post
```
The generated seralizer will contain basic `attributes` and
`has_many`/`has_one`/`belongs_to` declarations, based on the model. For example:
```ruby
class PostSerializer < ActiveModel::Serializer
attributes :title, :body
has_many :comments
has_one :author
end
```
and
```ruby
class CommentSerializer < ActiveModel::Serializer
attributes :name, :body
belongs_to :post_id
end
```
## Rails Integration
AMS will automatically integrate with you Rails app, you won't need to update your controller, this is a example of how it will look like:
```ruby
class PostsController < ApplicationController
def show
@post = Post.find(params[:id])
render json: @post
end
end
```