Done with the demo app

.gitignore

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+.bundle
+db/*.sqlite3
+log/*.log
+*.log
+tmp/**/*
+tmp/*
+doc/api
+doc/app
+*.swp
+*~
+.DS_Store

Gemfile.lock

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+GEM
+  remote: http://rubygems.org/
+  specs:
+    abstract (1.0.0)
+    actionmailer (3.0.7)
+      actionpack (= 3.0.7)
+      mail (~> 2.2.15)
+    actionpack (3.0.7)
+      activemodel (= 3.0.7)
+      activesupport (= 3.0.7)
+      builder (~> 2.1.2)
+      erubis (~> 2.6.6)
+      i18n (~> 0.5.0)
+      rack (~> 1.2.1)
+      rack-mount (~> 0.6.14)
+      rack-test (~> 0.5.7)
+      tzinfo (~> 0.3.23)
+    activemodel (3.0.7)
+      activesupport (= 3.0.7)
+      builder (~> 2.1.2)
+      i18n (~> 0.5.0)
+    activerecord (3.0.7)
+      activemodel (= 3.0.7)
+      activesupport (= 3.0.7)
+      arel (~> 2.0.2)
+      tzinfo (~> 0.3.23)
+    activeresource (3.0.7)
+      activemodel (= 3.0.7)
+      activesupport (= 3.0.7)
+    activesupport (3.0.7)
+    arel (2.0.9)
+    builder (2.1.2)
+    erubis (2.6.6)
+      abstract (>= 1.0.0)
+    i18n (0.5.0)
+    mail (2.2.19)
+      activesupport (>= 2.3.6)
+      i18n (>= 0.4.0)
+      mime-types (~> 1.16)
+      treetop (~> 1.4.8)
+    mime-types (1.16)
+    polyglot (0.3.1)
+    rack (1.2.2)
+    rack-mount (0.6.14)
+      rack (>= 1.0.0)
+    rack-test (0.5.7)
+      rack (>= 1.0)
+    rails (3.0.7)
+      actionmailer (= 3.0.7)
+      actionpack (= 3.0.7)
+      activerecord (= 3.0.7)
+      activeresource (= 3.0.7)
+      activesupport (= 3.0.7)
+      bundler (~> 1.0)
+      railties (= 3.0.7)
+    railties (3.0.7)
+      actionpack (= 3.0.7)
+      activesupport (= 3.0.7)
+      rake (>= 0.8.7)
+      thor (~> 0.14.4)
+    rake (0.8.7)
+    sqlite3-ruby (1.3.2)
+    thor (0.14.6)
+    treetop (1.4.9)
+      polyglot (>= 0.3.1)
+    tzinfo (0.3.27)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  rails (= 3.0.7)
+  sqlite3-ruby (= 1.3.2)

app/controllers/microposts_controller.rb

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+class MicropostsController < ApplicationController
+  # GET /microposts
+  # GET /microposts.xml
+  def index
+    @microposts = Micropost.all
+
+    respond_to do |format|
+      format.html # index.html.erb
+      format.xml  { render :xml => @microposts }
+    end
+  end
+
+  # GET /microposts/1
+  # GET /microposts/1.xml
+  def show
+    @micropost = Micropost.find(params[:id])
+
+    respond_to do |format|
+      format.html # show.html.erb
+      format.xml  { render :xml => @micropost }
+    end
+  end
+
+  # GET /microposts/new
+  # GET /microposts/new.xml
+  def new
+    @micropost = Micropost.new
+
+    respond_to do |format|
+      format.html # new.html.erb
+      format.xml  { render :xml => @micropost }
+    end
+  end
+
+  # GET /microposts/1/edit
+  def edit
+    @micropost = Micropost.find(params[:id])
+  end
+
+  # POST /microposts
+  # POST /microposts.xml
+  def create
+    @micropost = Micropost.new(params[:micropost])
+
+    respond_to do |format|
+      if @micropost.save
+        format.html { redirect_to(@micropost, :notice => 'Micropost was successfully created.') }
+        format.xml  { render :xml => @micropost, :status => :created, :location => @micropost }
+      else
+        format.html { render :action => "new" }
+        format.xml  { render :xml => @micropost.errors, :status => :unprocessable_entity }
+      end
+    end
+  end
+
+  # PUT /microposts/1
+  # PUT /microposts/1.xml
+  def update
+    @micropost = Micropost.find(params[:id])
+
+    respond_to do |format|
+      if @micropost.update_attributes(params[:micropost])
+        format.html { redirect_to(@micropost, :notice => 'Micropost was successfully updated.') }
+        format.xml  { head :ok }
+      else
+        format.html { render :action => "edit" }
+        format.xml  { render :xml => @micropost.errors, :status => :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /microposts/1
+  # DELETE /microposts/1.xml
+  def destroy
+    @micropost = Micropost.find(params[:id])
+    @micropost.destroy
+
+    respond_to do |format|
+      format.html { redirect_to(microposts_url) }
+      format.xml  { head :ok }
+    end
+  end
+end

app/controllers/users_controller.rb

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+class UsersController < ApplicationController
+  # GET /users
+  # GET /users.xml
+  def index
+    @users = User.all
+
+    respond_to do |format|
+      format.html # index.html.erb
+      format.xml  { render :xml => @users }
+    end
+  end
+
+  # GET /users/1
+  # GET /users/1.xml
+  def show
+    @user = User.find(params[:id])
+
+    respond_to do |format|
+      format.html # show.html.erb
+      format.xml  { render :xml => @user }
+    end
+  end
+
+  # GET /users/new
+  # GET /users/new.xml
+  def new
+    @user = User.new
+
+    respond_to do |format|
+      format.html # new.html.erb
+      format.xml  { render :xml => @user }
+    end
+  end
+
+  # GET /users/1/edit
+  def edit
+    @user = User.find(params[:id])
+  end
+
+  # POST /users
+  # POST /users.xml
+  def create
+    @user = User.new(params[:user])
+
+    respond_to do |format|
+      if @user.save
+        format.html { redirect_to(@user, :notice => 'User was successfully created.') }
+        format.xml  { render :xml => @user, :status => :created, :location => @user }
+      else
+        format.html { render :action => "new" }
+        format.xml  { render :xml => @user.errors, :status => :unprocessable_entity }
+      end
+    end
+  end
+
+  # PUT /users/1
+  # PUT /users/1.xml
+  def update
+    @user = User.find(params[:id])
+
+    respond_to do |format|
+      if @user.update_attributes(params[:user])
+        format.html { redirect_to(@user, :notice => 'User was successfully updated.') }
+        format.xml  { head :ok }
+      else
+        format.html { render :action => "edit" }
+        format.xml  { render :xml => @user.errors, :status => :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /users/1
+  # DELETE /users/1.xml
+  def destroy
+    @user = User.find(params[:id])
+    @user.destroy
+
+    respond_to do |format|
+      format.html { redirect_to(users_url) }
+      format.xml  { head :ok }
+    end
+  end
+end

app/helpers/microposts_helper.rb

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+module MicropostsHelper
+end

app/helpers/users_helper.rb

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+module UsersHelper
+end

app/models/micropost.rb

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+class Micropost < ActiveRecord::Base
+  belongs_to :user
+
+  validates :content, :length => { :maximum => 140 }
+end

app/models/user.rb

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+class User < ActiveRecord::Base
+  has_many :microposts
+end

app/views/microposts/_form.html.erb

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+<%= form_for(@micropost) do |f| %>
+  <% if @micropost.errors.any? %>
+    <div id="error_explanation">
+      <h2><%= pluralize(@micropost.errors.count, "error") %> prohibited this micropost from being saved:</h2>
+
+      <ul>
+      <% @micropost.errors.full_messages.each do |msg| %>
+        <li><%= msg %></li>
+      <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div class="field">
+    <%= f.label :content %><br />
+    <%= f.text_field :content %>
+  </div>
+  <div class="field">
+    <%= f.label :user_id %><br />
+    <%= f.text_field :user_id %>
+  </div>
+  <div class="actions">
+    <%= f.submit %>
+  </div>
+<% end %>

app/views/microposts/edit.html.erb

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+<h1>Editing micropost</h1>
+
+<%= render 'form' %>
+
+<%= link_to 'Show', @micropost %> |
+<%= link_to 'Back', microposts_path %>

app/views/microposts/index.html.erb

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+<h1>Listing microposts</h1>
+
+<table>
+  <tr>
+    <th>Content</th>
+    <th>User</th>
+    <th></th>
+    <th></th>
+    <th></th>
+  </tr>
+
+<% @microposts.each do |micropost| %>
+  <tr>
+    <td><%= micropost.content %></td>
+    <td><%= micropost.user_id %></td>
+    <td><%= link_to 'Show', micropost %></td>
+    <td><%= link_to 'Edit', edit_micropost_path(micropost) %></td>
+    <td><%= link_to 'Destroy', micropost, :confirm => 'Are you sure?', :method => :delete %></td>
+  </tr>
+<% end %>
+</table>
+
+<br />
+
+<%= link_to 'New Micropost', new_micropost_path %>

app/views/microposts/new.html.erb

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+<h1>New micropost</h1>
+
+<%= render 'form' %>
+
+<%= link_to 'Back', microposts_path %>

app/views/microposts/show.html.erb

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+<p id="notice"><%= notice %></p>
+
+<p>
+  <b>Content:</b>
+  <%= @micropost.content %>
+</p>
+
+<p>
+  <b>User:</b>
+  <%= @micropost.user_id %>
+</p>
+
+
+<%= link_to 'Edit', edit_micropost_path(@micropost) %> |
+<%= link_to 'Back', microposts_path %>

app/views/users/_form.html.erb

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+<%= form_for(@user) do |f| %>
+  <% if @user.errors.any? %>
+    <div id="error_explanation">
+      <h2><%= pluralize(@user.errors.count, "error") %> prohibited this user from being saved:</h2>
+
+      <ul>
+      <% @user.errors.full_messages.each do |msg| %>
+        <li><%= msg %></li>
+      <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div class="field">
+    <%= f.label :name %><br />
+    <%= f.text_field :name %>
+  </div>
+  <div class="field">
+    <%= f.label :email %><br />
+    <%= f.text_field :email %>
+  </div>
+  <div class="actions">
+    <%= f.submit %>
+  </div>
+<% end %>

app/views/users/edit.html.erb

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+<h1>Editing user</h1>
+
+<%= render 'form' %>
+
+<%= link_to 'Show', @user %> |
+<%= link_to 'Back', users_path %>