Lista la demo app

app/assets/javascripts/microposts.js.coffee

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+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://jashkenas.github.com/coffee-script/

app/assets/javascripts/users.js.coffee

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+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://jashkenas.github.com/coffee-script/

app/assets/stylesheets/microposts.css.scss

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+// Place all the styles related to the Microposts controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/assets/stylesheets/scaffolds.css.scss

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+body {
+  background-color: #fff;
+  color: #333;
+  font-family: verdana, arial, helvetica, sans-serif;
+  font-size: 13px;
+  line-height: 18px; }
+
+p, ol, ul, td {
+  font-family: verdana, arial, helvetica, sans-serif;
+  font-size: 13px;
+  line-height: 18px; }
+
+pre {
+  background-color: #eee;
+  padding: 10px;
+  font-size: 11px; }
+
+a {
+  color: #000;
+  &:visited {
+    color: #666; }
+  &:hover {
+    color: #fff;
+    background-color: #000; } }
+
+div {
+  &.field, &.actions {
+    margin-bottom: 10px; } }
+
+#notice {
+  color: green; }
+
+.field_with_errors {
+  padding: 2px;
+  background-color: red;
+  display: table; }
+
+#error_explanation {
+  width: 450px;
+  border: 2px solid red;
+  padding: 7px;
+  padding-bottom: 0;
+  margin-bottom: 20px;
+  background-color: #f0f0f0;
+  h2 {
+    text-align: left;
+    font-weight: bold;
+    padding: 5px 5px 5px 15px;
+    font-size: 12px;
+    margin: -7px;
+    margin-bottom: 0px;
+    background-color: #c00;
+    color: #fff; }
+  ul li {
+    font-size: 12px;
+    list-style: square; } }

app/assets/stylesheets/users.css.scss

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+// Place all the styles related to the Users controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/controllers/microposts_controller.rb

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+
+class MicropostsController < ApplicationController
+  # GET /microposts
+  # GET /microposts.json
+  def index
+    @microposts = Micropost.all
+
+    respond_to do |format|
+      format.html # index.html.erb
+      format.json { render json: @microposts }
+    end
+  end
+
+  # GET /microposts/1
+  # GET /microposts/1.json
+  def show
+    @micropost = Micropost.find(params[:id])
+
+    respond_to do |format|
+      format.html # show.html.erb
+      format.json { render json: @micropost }
+    end
+  end
+
+  # GET /microposts/new
+  # GET /microposts/new.json
+  def new
+    @micropost = Micropost.new
+
+    respond_to do |format|
+      format.html # new.html.erb
+      format.json { render json: @micropost }
+    end
+  end
+
+  # GET /microposts/1/edit
+  def edit
+    @micropost = Micropost.find(params[:id])
+  end
+
+  # POST /microposts
+  # POST /microposts.json
+  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.json { render json: @micropost, status: :created, location: @micropost }
+      else
+        format.html { render action: "new" }
+        format.json { render json: @micropost.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # PUT /microposts/1
+  # PUT /microposts/1.json
+  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.json { head :no_content }
+      else
+        format.html { render action: "edit" }
+        format.json { render json: @micropost.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /microposts/1
+  # DELETE /microposts/1.json
+  def destroy
+    @micropost = Micropost.find(params[:id])
+    @micropost.destroy
+
+    respond_to do |format|
+      format.html { redirect_to microposts_url }
+      format.json { head :no_content }
+    end
+  end
+end

app/controllers/users_controller.rb

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+
+class UsersController < ApplicationController
+  # GET /users
+  # GET /users.json
+  def index
+    @users = User.all
+
+    respond_to do |format|
+      format.html # index.html.erb
+      format.json { render json: @users }
+    end
+  end
+
+  # GET /users/1
+  # GET /users/1.json
+  def show
+    @user = User.find(params[:id])
+
+    respond_to do |format|
+      format.html # show.html.erb
+      format.json { render json: @user }
+    end
+  end
+
+  # GET /users/new
+  # GET /users/new.json
+  def new
+    @user = User.new
+
+    respond_to do |format|
+      format.html # new.html.erb
+      format.json { render json: @user }
+    end
+  end
+
+  # GET /users/1/edit
+  def edit
+    @user = User.find(params[:id])
+  end
+
+  # POST /users
+  # POST /users.json
+  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.json { render json: @user, status: :created, location: @user }
+      else
+        format.html { render action: "new" }
+        format.json { render json: @user.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # PUT /users/1
+  # PUT /users/1.json
+  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.json { head :no_content }
+      else
+        format.html { render action: "edit" }
+        format.json { render json: @user.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /users/1
+  # DELETE /users/1.json
+  def destroy
+    @user = User.find(params[:id])
+    @user.destroy
+
+    respond_to do |format|
+      format.html { redirect_to users_url }
+      format.json { head :no_content }
+    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
+  attr_accessible :content, :user_id
+
+  belongs_to :user
+
+  validates :content, :length => { :maximum => 140 }
+end

app/models/user.rb

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+class User < ActiveRecord::Base
+  attr_accessible :email, :name
+  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.number_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 %>