mb-dev

class LineItem
  include Mongoid::Document
  include Mongoid::Timestamps

  TYPE = %w[income expense]
  INCOME = 0
  EXPENSE = 1

  TRANSFER_IN = 'Transfer In'
  TRANSFER_OUT = 'Transfer Out'

mb-dev

class PostsController < ApplicationController
  def show
    @post = Post.includes(comments: :user).find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @post }
    end
  end
end

mb-dev

<div class="post">
  <%= render partial: 'post', locals: {post: @post} %>

  <hr/>

  <div class="comments">
    <% @post.comments.each do |comment| %>
      <div id="comment-<%=comment.id%>">
        <%= comment.user.name %> says:
        <p>

mb-dev

<% cache @post do %>
  <div class="post">
    <%= render partial: 'post', locals: {post: @post} %>

    <hr/>

    <div class="comments">
      <% @presenter.comments.each do |comment| %>
        <% cache comment do %>
          <div id="comment-<%=comment.id%>">

mb-dev

class PostPresenter
  def initialize(post)
    @post = post
  end

  def comments
    Comment.includes(:user).where(post_id: @post.id)
  end

end

mb-dev

class PostsController < ApplicationController
  def show
    @post = Post.find(params[:id])
    @presenter = PostPresenter.new(@post)
    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @post }
    end
  end
end

mb-dev

Book:
{
     id: 1,
     title: 'Article 1',
     authors: [1,2]
}

Author:
{
    id: 1,

mb-dev

Book:
{
     id: 1,
     title: 'Article 1',
     authors: [{author_id: 1, name: 'Joe'}, {author_id: 2, name: 'Robert'}]
}

mb-dev

class Book
   field :id
   field :title
 
   embeds_many :book_authors

   # Mongoid does not offer has_many :through
   def authors
      book_authors.collect(&:author)
   end

mb-dev

User:
{
     id: 1,
     name: 'Joe'
}

MailBucket:
{
    user_id: 1,
    location: 11,