active_model_serializers/test/fixtures/poro.rb

class Model
  def initialize(hash={})
    @attributes = hash
  end

  def cache_key
    "#{self.class.name.downcase}/#{self.id}-#{self.updated_at}"
  end

  def updated_at
    @attributes[:updated_at] ||= DateTime.now.to_time.to_i
  end

  def read_attribute_for_serialization(name)
    if name == :id || name == 'id'
      id
    else
      @attributes[name]
    end
  end

  def id
    @attributes[:id] || @attributes['id'] || object_id
  end

  def to_param
    id
  end

  def method_missing(meth, *args)
    if meth.to_s =~ /^(.*)=$/
      @attributes[$1.to_sym] = args[0]
    elsif @attributes.key?(meth)
      @attributes[meth]
    else
      super
    end
  end
end

class Profile < Model
end

class ProfileSerializer < ActiveModel::Serializer
  attributes :name, :description

  urls :posts, :comments
end

class ProfilePreviewSerializer < ActiveModel::Serializer
  attributes :name

  urls :posts, :comments
end

Post = Class.new(Model)
Comment = Class.new(Model)
Author = Class.new(Model)
Bio = Class.new(Model)
Blog = Class.new(Model)
Role = Class.new(Model)
module Spam; end
Spam::UnrelatedLink = Class.new(Model)

PostSerializer = Class.new(ActiveModel::Serializer) do
  cache key:'post', expires_in: 0.05
  attributes :id, :title, :body

  has_many :comments
  belongs_to :blog
  belongs_to :author
  url :comments

  def blog
    Blog.new(id: 999, name: "Custom blog")
  end
end

SpammyPostSerializer = Class.new(ActiveModel::Serializer) do
  attributes :id
  has_many :related

  def self.root_name
    'posts'
  end
end

CommentSerializer = Class.new(ActiveModel::Serializer) do
  cache expires_in: 1.day
  attributes :id, :body

  belongs_to :post
  belongs_to :author
end

AuthorSerializer = Class.new(ActiveModel::Serializer) do
  cache key:'writer'
  attributes :id, :name

  has_many :posts, embed: :ids
  has_many :roles, embed: :ids
  has_one :bio
end

RoleSerializer = Class.new(ActiveModel::Serializer) do
  attributes :id, :name

  belongs_to :author
end

BioSerializer = Class.new(ActiveModel::Serializer) do
  attributes :id, :content

  belongs_to :author
end

BlogSerializer = Class.new(ActiveModel::Serializer) do
  attributes :id, :name

  belongs_to :writer
  has_many :articles
end

PaginatedSerializer = Class.new(ActiveModel::Serializer::ArraySerializer) do
  def json_key
    'paginated'
  end
end

AlternateBlogSerializer = Class.new(ActiveModel::Serializer) do
  attribute :id
  attribute :name, key: :title
end

CommentPreviewSerializer = Class.new(ActiveModel::Serializer) do
  attributes :id

  belongs_to :post
end

AuthorPreviewSerializer = Class.new(ActiveModel::Serializer) do
  attributes :id

  has_many :posts
end

PostPreviewSerializer = Class.new(ActiveModel::Serializer) do
  def self.root_name
    'posts'
  end

  attributes :title, :body, :id

  has_many :comments, serializer: CommentPreviewSerializer
  belongs_to :author, serializer: AuthorPreviewSerializer
end

Spam::UnrelatedLinkSerializer = Class.new(ActiveModel::Serializer) do
  attributes :id
end