Active Model Serializer Lab

Learning Goals

• Use Active Model Serializer to render JSON
• Use Active Model Serializer to render JSON for associations

Introduction

For this lab, we're going to return to our Blog application and update it to use ActiveModel::Serializer for JSON serialization.

To set up the app, run:

$ bundle install
$ rails db:migrate db:seed
$ rails s

Our app includes four resources: Author, Profile, Post, and Tag, as well as a post_tag join table. All the associations have been set up, as well as index and show routes and actions for each of the four resources.

Start by building the serializers based on the instructions below. Check your work in the browser as you go. Then, run learn test to make sure your code passes the tests.

Instructions

Author

Set up a serializer for Author that returns the following JSON:

1. The author's name
2. The author's profile, including only the username, email, bio and avatar_url
3. A list of the author's posts, including:

• the title
• the first 40 characters of the post's content as short_content, with a trailing ellipsis (...) at the end
• a list of the associated tags

Note: You will need to make serializers for the Profile and Post models to get this working.

Posts

Set up a serializer for the Post model that displays the following:

1. The post's title and content
2. The name of the author
3. The tags associated with the post

Tags

Set up a serializer for Tag that displays the following:

1. The name of the tag
2. A list of the posts the tag is associated with