Add Serialize With fast_jsonapi In A Rails App as a rails til

README.md

@@ -10,7 +10,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 For a steady stream of TILs from a variety of rocketeers, checkout
 [til.hashrocket.com](https://til.hashrocket.com/).
 
-_761 TILs and counting..._
+_762 TILs and counting..._
 
 ---
 
@@ -485,6 +485,7 @@ _761 TILs and counting..._
 - [Secure Passwords With Rails And Bcrypt](rails/secure-passwords-with-rails-and-bcrypt.md)
 - [Select A Select By Selector](rails/select-a-select-by-selector.md)
 - [Select Value For SQL Counts](rails/select-value-for-sql-counts.md)
+- [Serialize With fast_jsonapi In A Rails App](rails/serialize-with-fast-jsonapi-in-a-rails-app.md)
 - [Set Schema Search Path](rails/set-schema-search-path.md)
 - [Show Pending Migrations](rails/show-pending-migrations.md)
 - [Show Rails Models With Pry](rails/show-rails-models-with-pry.md)

rails/serialize-with-fast-jsonapi-in-a-rails-app.md

@@ -0,0 +1,52 @@
+# Serialize With fast_jsonapi In A Rails App
+
+Netflix put out a Ruby gem for super fast JSON serialization --
+[`fast_jsonapi`](https://github.com/Netflix/fast_jsonapi). It is great for
+serializing JSON responses for Rails API endpoints.
+
+First, add `gem 'fast_jsonapi'` to your `Gemfile` and `bundle install`.
+
+Then create the `app/serializers` directory for housing all of your JSON
+serializers.
+
+Next you can create a `serializer` that corresponds to the model you want to
+serialize:
+
+```ruby
+# app/serializers/recipe_serializer.rb
+class RecipeSerializer
+  include FastJsonapi::ObjectSerializer
+
+  set_id :id
+  attributes :name, :source_url
+end
+```
+
+Last, use it to generate a JSON response in your controller:
+
+```ruby
+# app/controllers/recipes_controller.rb
+class RecipesController < ApiController
+  def index
+    render json: RecipeSerializer.new(@current_user.recipes)
+  end
+end
+```
+
+Requests to that endpoint will receive a response that looks something like
+this:
+
+```json
+{
+  data: [
+    {
+      id: 1,
+      attributes: { name: "Old Fashioned", source_url: "http://..." },
+    },
+    {
+      id: 2,
+      attributes: { name: "Sazerac", source_url: "http://..." },
+    },
+  ]
+}
+```