blog | railsdav

liverail.net

making a better digital london

Tutorial on developing a Facebook platform application with Ruby On Rails

June 29th, 2007

If you havn’t heard of Facebook. Where you been, living in a cave! Well you also probably know that in June 2007 Facebook opened a development platform for integrating new applications into Facebook, also codenamed F8. By the 24th June there were a 1,000 new applications available for the Facebook networkers to play with. According to both the online and traditional news media, Facebook have changed the game.

Well ZDNet are reporting that 1,000 developers a day are joining Facebook platform. That as it may, they are not all creating applications right away. The documentation is patchy, spread-out, difficult to understand and incomplete. It is a wonder so many applications are built because there is pain to go through to get there.

But this article is a complete tutorial for building a simple Facebook application in Ruby On Rails and should allow you to hit the ground running. We are going to create a recipes sharing application for Facebook from scratch.

UPDATE: The second part can be found here

UPDATE: This article is a bit out of date now, I have now posted an article on Rails, resful_authentication and Facebook connect

If you havn’t heard of Facebook. Where you been, living in a cave! Well you also probably know that in June 2007 Facebook opened a development platform for integrating new applications into Facebook, also codenamed F8. By the 24th June there were a 1,000 new applications available for the Facebook networkers to play with. According to both the online and traditional news media, Facebook have changed the game.

Well ZDNet are reporting that 1,000 developers a day are joining Facebook platform. That as it may, they are not all creating applications right away. The documentation is patchy, spread-out, difficult to understand and incomplete. It is a wonder so many applications are built because there is pain to go through to get there.

But this article is a complete tutorial for building a simple Facebook application in Ruby On Rails and should allow you to hit the ground running. We are going to create a recipes sharing application for Facebook from scratch.

UPDATE: The second part can be found here

First of all some useful links:

• Facebook Developers
• Facebook Documentation
• Facebook Developers Wiki
• Ruby On Rails Facebook Application Forum

Facebook has provided many different integration points and different APIs to an application so it is worth reading Anatomy of a Facebook Application first which will explain the areas an application can affect for a user.

There are two different types of Facebook application

1. A desktop application
2. A website application

We are only going to be concerned with website applications for now. There is also 3 different ways an application can interact with Facebook.

1. As an external application but interacting with the remote API
2. Running in an IFRAME on the Facebook site
3. Running in a Facebook canvas and using Facebook Markup Language (FBML)

The application can use one or all of these techniques. We are going to try all three in this tutorial.

But first lets start by creating a Rails application with NO Facebook stuff and then we’ll look at FB-ing it. Originally I planned to do this completely RESTfully but it turns out it doesn’t work well with Facebook canvas, so it’s old-skool Rails i’m afraid.

Lets create the application:

    
rails socialrecipe

cd socialrecipe
    

And create some models. We are keeping this application very simple for demo purposes so just a recipe and a comment model needed. (you will need to concate these lines properly)

    
ruby script/generate model Recipe 
title:string summary:text ingredients:text instructions:text 
cooking_time:string created_at:datetime updated_at:datetime

ruby script/generate model Comment 
recipe_id:integer body:text created_at:datetime updated_at:datetime
    

Lets create our databases. I’m using MySQL

    
sudo mysqladmin create socialrecipe_development
sudo mysqladmin create socialrecipe_test
    

Lets changed to using database sessions. Now edit config/environment.rb change the Rails Initializer section and uncomment the following line

    
config.action_controller.session_store = :active_record_store
    

And add a line at the end of config/environment.rb

    
ActionController::AbstractRequest.relative_url_root = "/socialrecipe" 
    

What this does is change the Rails application to run starting with a socialrecipe in the first part of the URL. We need this for later but you will need your own unique name (i’m using socialrecipe). So think of one and take note.

Now lets create our development database.

    
rake db:sessions:create

rake db:migrate
    

Now lets create our controllers

    
ruby script/generate controller recipes 
ruby script/generate controller comments
    

Excellent. Now lets change our model definitions so that Recipes can have many comments. Edit app/models/recipe.rb to

    
class Recipe < ActiveRecord::Base
    has_many :comments

    validates_presence_of :title, :summary, :ingredients, :instructions
end
    

And edit models/comment.rb to

    
class Comment < ActiveRecord::Base
    belongs_to :recipe

    validates_presence_of :body, :recipe_id

end
    

Now lets add the controller for the recipe. Edit app/controllers/recipes_controller.rb and change it to

    
class RecipesController < ApplicationController

  def index
    @recipes = Recipe.find(:all)
    @title = "All recipes" 
  end

  def show
    @recipe = Recipe.find(params[:id])
  end

  def new
    @recipe = Recipe.new
  end

  def edit
    @recipe = Recipe.find(params[:id])
  end

  def create
    @recipe = Recipe.new(params[:recipe])

    if @recipe.save
      flash[:notice] = 'Recipe was successfully created.'
      redirect_to :action => 'show', :id => @recipe
    else
      render :action => "new" 
    end

  end

  def update
    @recipe = Recipe.find(params[:id])

    if @recipe.update_attributes(params[:recipe])
      flash[:notice] = 'Recipe was successfully updated.'
      redirect_to :action => 'show', :id => @recipe
    else
      render :action => "edit" 
    end
  end

end
    

Edit app/controllers/comments_controller.rb and change it to

    
class CommentsController < ApplicationController

  def new
    @comment = Comment.new
    @comment.recipe_id = params[:recipe_id]
  end

  def create
    @comment = Comment.new(params[:comment])
    if @comment.save
      flash[:notice] = 'Comment was successfully created.'
      redirect_to :controller => 'recipes', :action => 'show', :id => @comment.recipe
    else
      render_action 'new' 
    end
  end
end
    

Pretty standard stuff so far creating simple controllers to create, read and update recipes and create comments. Lets setup the views

Add app/views/recipes/index.rhtml with

    
<h2><%= @title %></h2>

<%@recipes.each do |recipe|%>
<div>
<h3><%= link_to h(recipe.title), :controller => 'recipes', :action => 'show', :id => recipe%></h3>
<p><%=h recipe.summary %></p>
</div>
<%end%>

<br/>
<%= link_to 'New recipe', :controller => 'recipes', :action => 'new' %>
    

Add app/views/recipes/new.rhtml with

    
        <h1>New recipe</h1>

        <%= error_messages_for :recipe %>

        <% form_for(:recipe, :url => {:controller => 'recipes', :action => 'create'}) do |f| %>
          <dl>
              <dt><label for="recipe_title">Title:</label></dt>
            <dd><%= f.text_field :title %></dd>
            <dt><label for="recipe_summary">Summary:</label></dt>
            <dd><%= f.text_area :summary %></dd>
            <dt><label for="recipe_ingredients">Ingredients:</label></dt>
            <dd><%= f.text_area :ingredients %></dd>
            <dt><label for="recipe_instructions">Cooking Instructions:</label></dt>
            <dd><%= f.text_area :instructions %></dd>
            <dt><label for="recipe_cooking_time">Cooking Time:</label></dt>
            <dd><%= f.text_field :cooking_time %> mins</dd>
            <dt></dt>
            <dd><%= submit_tag "Create" %></dd>
          </dl>
        <% end %>

        <br/>
        <%= link_to 'Back', :controller => 'recipes' %>
    

The use of dl tags for forms is not a facebook thing. It’s just the way I rock it.

Add app/views/recipes/edit.rhtml with

    
<h1>Editing recipe</h1>

<%= error_messages_for :recipe %>

<% form_for(:recipe, 
      :url => {:controller =>'recipes', :action => 'update', :id => @recipe}) do |f| %>
<dl>
    <dt><label for="recipe_title">Title:</label></dt>
    <dd><%= f.text_field :title %></dd>
    <dt><label for="recipe_summary">Summary:</label></dt>
    <dd><%= f.text_area :summary %></dd>
    <dt><label for="recipe_ingredients">Ingredients:</label></dt>
    <dd><%= f.text_area :ingredients %></dd>
    <dt><label for="recipe_instructions">Cooking Instructions:</label></dt>
    <dd><%= f.text_area :instructions %></dd>
    <dt><label for="recipe_cooking_time">Cooking Time:</label></dt>
    <dd><%= f.text_field :cooking_time %> mins</dd>
    <dt></dt>
    <dd><%= submit_tag "Update" %></dd>
</dl>
<% end %>

<br/>
<%= link_to 'Show', :controller => 'recipes', :action => 'show', :id =>@recipe %> |
<%= link_to 'Back', :controller => 'recipes' %>
    

Add app/views/recipes/show.rhtml with

    
<h1><%=h @recipe.title %></h1>
<p><%=h @recipe.summary %></p>

<h2>Ingredients:</h2>
<p><%=h @recipe.ingredients %></p>

<h2>Instructions:</h2>
<p><%=h @recipe.instructions %></p>

<p><em>Cooking time is around <%=h @recipe.cooking_time %> mins</em></p>

<div id="comments">
    <h2>Displaying <%=pluralize(@recipe.comments.size, 'comment')%></h2>
    <%= link_to 'New comment', :controller => 'comments', :action => 'new', :recipe_id => @recipe %>
       <% @recipe.comments.each do |comment| %>
           <div>
                <p><%= comment.body %></p>    
                posted <%= time_ago_in_words(comment.created_at)  %> ago
            </div>
       <%end %>
</div>

<br/>
<%= link_to 'Edit', :controller => 'recipes', :action => 'edit', :id => @recipe %> |
<%= link_to 'Back', :controller => 'recipes' %>
    

Add app/views/comments/new.rhtml with

    
<h1>New comment</h1>

<%= error_messages_for :comment %>

<% form_for(:comment, :url => 
      {:controller => 'comments', :action => 'create'}) do |f| %>
<dl>
    <dt><label for="comment_body">Body Content:</label></dt>
    <dd><%= f.text_area :body %></dd>
    <dt></dt>
    <dd><%= submit_tag "Create" %></dd>
</dl>
    <%= f.hidden_field :recipe_id, :value => @comment.recipe_id %>
<% end %>
    

And lets create a layout at app/views/layouts/index.rhtml

    
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
       "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
  <meta http-equiv="content-type" content="text/html;charset=UTF-8" />
  <title>Recipes: <%= controller.action_name %></title>
</head>
<body>
<p style="color: green"><%= flash[:notice] %></p>

<%= yield  %>

</body>
</html>
    

and add this line to the app/controllers/application.rb

    
layout 'index'
    

change config/routes.rb to have a default route

    
map.connect '', :controller => "recipes" 
    

and delete index.html from your public directory. That’s it. We now have a simple (and very ugly application). Fire it up with script/server and go to http://localhost:3000/socialrecipe

Lets facebook-it!! First of all we need to install the Ruby Gem RFacebook (this tutorial uses the version 0.6.2. This is a helper for interacting with the Facebook APIs. It will require you install Hpricot but make sure you pick the ruby version not the jruby one.

    
sudo gem install rfacebook -v 0.6.2        
    

Now you’ll need to log on to facebook (what do you mean you’re not on facebook!) and add the Developer application. Once you have done that press the big “Set Up New Application” button.

Now fill in the following fields

Application Name: Social Recipes (You will need to change this as i have done social recipes) Check the box for Check here to indicate that you have read and agree to the terms of the Facebook Platform. Callback Url: http://localhost:3000/socialrecipe/ (The end of this is the same as your relative_url_root) Canvas Page URL: http://apps.facebook.com/ socialrecipe (The field of this is the same as your relative_url_root) Check Use iframe for now Can your application be added on Facebook? Yes Post-Add URL: http://apps.facebook.com/socialrecipe/ (The end of this is the same as your relative_url_root)

That is all hit save and you should have a page listing your application with an API Key and a Secret. Make a note of your applications API Key and Secret

Now lets edit our rails application. Add the following to your ApplicationController in app/controllers/application.rb

    
before_filter :require_facebook_login, :set_user
include RFacebook::RailsControllerExtensions

def facebook_api_key
  return "ADD YOUR API KEY HERE" 
end

def facebook_api_secret
  return "ADD YOUR SECRET HERE" 
end

def finish_facebook_login
  redirect_to :controller => "recipes" 
end

def set_user
  @current_fb_user_id = fbsession.session_user_id
end
    

and add the following to your config/environment.rb

    
require "facebook_rails_controller_extensions" 
    

You’ll see you need to add your own key and own secret to this. The set_user filter is going to set a variable in the controller with the logged in facebook users id. We need this because we are going to store which users created which recipes and comments. To do this we need to add columns to our recipes and comments tables to store the id in. These must be BIGINT if you are using MySQL. Facebook has A LOT of users.

    
script/generate migration add_fb_user_ids
    

Now edit db/migrate/004_add_fb_user_ids.rb to:

    
class AddFbUserIds < ActiveRecord::Migration
  def self.up
      add_column :recipes, :fb_user_id, :integer
      add_column :comments, :fb_user_id, :integer

      #if mysql
      execute("alter table recipes modify fb_user_id bigint")
      execute("alter table comments modify fb_user_id bigint")
  end

  def self.down
      remove_column :recipes, :fb_user_id
      remove_column :comments, :fb_user_id
  end
end
    

    
rake db:migrate
    

We now need to store the facebook user ids in the tables so we’ll add a hidden field to the forms

Add the following to app/views/recipes/new.rhtml and app/views/comments/new.rhtml just before the end of the form

    
<%= f.hidden_field :fb_user_id, :value => @current_fb_user_id %>
    

We are also going to protect the edit recipe to only allow you to edit your own recipes in app/views/recipes/show.rhtml change

    
    <%= link_to 'Edit', :controller => 'recipes', :action => 'edit', :id => @recipe %> |
    

to

    
<%is_my_recipe? @recipe do %>
    <%= link_to 'Edit', :controller => 'recipes', :action => 'edit', :id => @recipe %> |
<%end%>
    

and add the following to app/helpers/recipes_helper.rb

    
def is_my_recipe?(recipe, &block)
  yield if recipe.fb_user_id.to_i == @current_fb_user_id.to_i
end
    

See how we cast the facebook user ids to ints. This makes the match actually possible.

Now that was easy but it’s not very Facebooky. Where’s the social? Lets add some friends stuff.

Edit app/controllers/recipes_controller.rb and add the following actions

    
def my
  @title = "My recipes" 
  @recipes = Recipe.find_my_recipes(@current_fb_user_id)

  render :file => "recipes/index", :use_full_path => true
end

def friends
  @title = "Friends recipes" 

  xml_friends_get = fbsession.friends_get
  friend_ids = xml_friends_get.search("//uid").map{|uidNode| uidNode.inner_html.to_i}

  @recipes = Recipe.find_friends_recipes(friend_ids)
  render :file => "recipes/index", :use_full_path => true
end
    

Add the following to your Recipe model at app/models/recipe.rb

    
class << self

def find_my_recipes(fb_user_id)
  find(:all, :conditions => ['fb_user_id = ?', fb_user_id])
end

def find_friends_recipes(friends_fb_ids)
  find(:all, :conditions => ['fb_user_id IN (?)', friends_fb_ids])
end

end
    

You can see how we use the facebook API through the rfacebook fbsession.friends_get. This then returns Hpricot XML which we parse to get all the friends of the current user and then look for any Recipes they have created. lets just add these actions to some basic navigation.

Edit app/views/layouts/index.rhtml and include the following just under the body tag

    
    <div id="navigation">
<%= link_to 'All recipes', :controller=>'recipes'%> | 
<%= link_to 'My recipes', :controller=>'recipes', :action => 'my'%> | 
<%= link_to 'Friends recipes', :controller=>'recipes', :action => 'friends'%>
    </div>
    

We’re done lets start with script/server and navigate to http://localhost:3000/socialrecipe. Woah did you just get redirected to Facebook. Oh yes! It should be asking you to add your new Facebook application now. Tick keep me logged in and press the Log in to button.

You should now get returned to your local application. This is an example of an External Facebook Application. Try creating a new recipe and check it appears in My Recipes.

Try going to http://apps.facebook.com/socialrecipe/. You should see your application inside Facebook. This is an example of an IFrame Facebook Application.

Your application could now be ready to go, you could deploy your application to a server, submit it to the directory and let people add it. But its still not very facebook’y. We shall now go on and look at turning this into a Canvas application. In a canvas FBML application, instead of embedding your application in an IFrame, Facebook is going to make a proxy request to your application and parse the resulting markup. In this markup it can contain the Facebook Markup Language which can display more Facebook like interfaces and other direct interactions but it does limit you in what markup you can use and what you can achieve.

Now because Facebook needs to make a request to a server it must be accessible to Facebook, hence you can’t just run it on your laptop (or you can if you have a static Ip you could route facebook to). But i’m going to use my excellent RailsMachine serving to deploy the application at http://socialrecipe.liverail.net/. So don’t attempt these next steps unless you can also deploy your server to the world.

First of all we need to switch our layouts if we are in the canvas. So change the app/controllers/application.rb

    
layout 'index'
    

to

    
layout :check_fb_layout

def check_fb_layout
  if in_facebook_canvas?
    "index_fbml" 
  else
    "index" 
  end
end
    

This is going to check if the request is in a facebook canvas and if so render a different layout. So add a new layout at app/views/layouts/index_fbml.rhtml

    
<fb:dashboard>
  <fb:header decoration="add_border" icon="false">Liverail Recipes</fb:header>
  <fb:create-button 
href="<%= url_for(:controller => 'recipes', :action => "new", :only_path => true) %>">
New Recipe</fb:create-button>    
</fb:dashboard>
<fb:tabs>
  <fb:tab_item 
href="http://apps.facebook.com<%= url_for(:controller => 'recipes', :action => "index", :only_path => true) %>" 
title="All Recipes"></fb:tab_item>
  <fb:tab_item 
href="http://apps.facebook.com<%= url_for(:controller => 'recipes', :action => "my", :only_path => true) %>" 
title="My Recipes">My Recipes</fb:tab_item>
  <fb:tab_item 
href="http://apps.facebook.com<%= url_for(:controller => 'recipes', :action => "friends", :only_path => true) %>" 
title="Friends Recipes">Friends Recipes</fb:tab_item>
</fb:tabs>

<%unless flash[:notice].blank? %>
<fb:status><%= flash[:notice] %></fb:status>
<%end%>

<%= yield  %>
    

This will add a Facebook navigation tabs. Notice how the fb:create-button_ works fine with a relative URL but the fb:tab_item requires an absolute url with the http://apps.facebook.com, this is one of the many oddities with FBML. Additionaly we must surround the fb:status with a check because it won’t work if you have a blank tag.

We now need to render different markup for our pages.

Add the following to app/controllers/application.rb

    
      def render_facebook(template = default_template_name)
        if in_facebook_canvas? #or true
           render :action => "#{template}_fbml" 
        else
           render :action => "#{template}" 
        end
      end
    

You now need to add a call to render_facebook at the end of actions index, show, new, edit for the recipes controller, add a call to render_facebook “index” at the end of actions my, friends for the recipes controller and finally render_facebook at the end of actions new for the comments controller.

Lets create some FBML rendering templates.

First app/views/recipes/index_fbml.rhtml

    
        <fb:header decoration="add_border" icon="false"><%= @title %></fb:header>
        <%@recipes.each do |recipe| %>
            <div>
            <h3><%= link_to h(recipe.title), :controller => 'recipes', :action => 'show', :id => recipe%></h3>
            <p>
                      <fb:profile-pic uid="<%= recipe.fb_user_id %>" size="thumb" />
                      <fb:name uid="<%= recipe.fb_user_id %>" ifcantsee="anonymous" />
                       </p>
            <p><%=h recipe.summary %></p>
            </div>
        <%end%>
    

app/views/recipes/new_fbml.rhtml

    
        <fb:header decoration="add_border" icon="false">New Recipe</fb:header>
        <%unless @recipe.errors.blank?%>
        <fb:error><%= error_messages_for :recipe %></fb:error>
        <%end%>

            <% form_for(:recipe, :url => {:controller => 'recipes', :action => 'create'}) do |f| %>
              <dl>
                  <dt><label for="recipe_title">Title:</label></dt>
                <dd><%= f.text_field :title %></dd>
                <dt><label for="recipe_summary">Summary:</label></dt>
                <dd><%= f.text_area :summary %></dd>
                <dt><label for="recipe_ingredients">Ingredients:</label></dt>
                <dd><%= f.text_area :ingredients %></dd>
                <dt><label for="recipe_instructions">Cooking Instructions:</label></dt>
                <dd><%= f.text_area :instructions %></dd>
                <dt><label for="recipe_cooking_time">Cooking Time:</label></dt>
                <dd><%= f.text_field :cooking_time %> mins</dd>
                <dt></dt>
                <dd><%= submit_tag "Create" %></dd>
              </dl>
            <%= f.hidden_field :fb_user_id, :value => @current_fb_user_id %>
            <% end %>

        <br/>
        <%= link_to 'Back', :controller => 'recipes' %>
    

app/views/recipes/edit_fbml.rhtml

    
        <fb:header decoration="add_border" icon="false">Edit Recipe</fb:header>
        <%unless @recipe.errors.blank?%>
        <fb:error><%= error_messages_for :recipe %></fb:error>
        <%end%>

        <% form_for(:recipe, :url => {:controller =>'recipes', :action => 'update', :id => @recipe}) do |f| %>
        <dl>
            <dt><label for="recipe_title">Title:</label></dt>
            <dd><%= f.text_field :title %></dd>
            <dt><label for="recipe_summary">Summary:</label></dt>
            <dd><%= f.text_area :summary %></dd>
            <dt><label for="recipe_ingredients">Ingredients:</label></dt>
            <dd><%= f.text_area :ingredients %></dd>
            <dt><label for="recipe_instructions">Cooking Instructions:</label></dt>
            <dd><%= f.text_area :instructions %></dd>
            <dt><label for="recipe_cooking_time">Cooking Time:</label></dt>
            <dd><%= f.text_field :cooking_time %> mins</dd>
            <dt></dt>
            <dd><%= submit_tag "Update" %></dd>
        </dl>
        <% end %>

        <br/>
        <%= link_to 'Show', :controller => 'recipes', :action => 'show', :id =>@recipe %> |
        <%= link_to 'Back', :controller => 'recipes' %>
    

app/views/recipes/show_fbml.rhtml

    
<fb:header decoration="add_border" icon="false">
<%=h @recipe.title %>
</fb:header>
<fb:profile-pic uid="<%= @recipe.fb_user_id %>" size="normal" /> 
<fb:name uid="<%= @recipe.fb_user_id %>" ifcantsee="anonymous" />
<p><%=h @recipe.summary %></p>

<h2>Ingredients:</h2>
<p><%=h @recipe.ingredients %></p>

<h2>Instructions:</h2>
<p><%=h @recipe.instructions %></p>

<p><em>Cooking time is around <%=h @recipe.cooking_time %> mins</em></p>

<div id="comments">
    <h2>Displaying <%=pluralize(@recipe.comments.size, 'comment')%></h2>
    <%= link_to 'New comment', :controller => 'comments', :action => 'new', :recipe_id => @recipe %>
       <% @recipe.comments.each do |comment| %>
           <div>
                <fb:profile-pic uid="<%= comment.fb_user_id %>" size="thumb" />
            <p><%= comment.body %></p>    
                posted <%= time_ago_in_words(comment.created_at)  %> 
ago by 
<strong>
<fb:name uid="<%= comment.fb_user_id %>" ifcantsee="anonymous" />
</strong>
            </div>
       <%end %>
</div>

<br/>
<%is_my_recipe? @recipe do %>
    <%= link_to 'Edit', :controller => 'recipes', :action => 'edit', :id => @recipe %> |
<%end%>
<%= link_to 'Back', :controller => 'recipes' %>
    

app/views/comments/new_fbml.rhtml

    
<fb:header decoration="add_border" icon="false">New Comment</fb:header>
<%unless @comment.errors.blank?%>
<fb:error><%= error_messages_for :comment %></fb:error>
<%end%>

<% form_for(:comment, :url => {:controller => 'comments', :action => 'create'}) do |f| %>
<dl>
    <dt><label for="comment_body">Body Content:</label></dt>
    <dd><%= f.text_area :body %></dd>
    <dt></dt>
    <dd><%= submit_tag "Create" %></dd>
</dl>
    <%= f.hidden_field :recipe_id, :value => @comment.recipe_id %>
    <%= f.hidden_field :fb_user_id, :value => @current_fb_user_id %>
<% end %>

<br/>
<%= link_to 'Back', :controller => 'recipes', :action => 'show', :id => @comment.recipe_id %>
    

Now i’m all done. I’m deploying my application to socialrecipe.liverail.net using capistrano and their great 5 min app deployment but you use whichever method you do to deploy your application (remember to install the rfacebook gem on your server). Once that is done you need to change the application settings in Facebook. Log on to Facebook and go the Developer application > See my apps > Edit Settings. Now change the Callback URL from http://localhost:3000/socialrecipe/ to http://socialrecipe.liverail.net/socialrecipe/ with your own names of course. Now click the Use FBML radio button and save

Go to http://apps.facebook.com/socialrecipe. Done! Ruby on Rails Facebook application.

It isn’t the best looking but you can style to your heart’s content. Go to here if you want to add my demo application and play it. In the next part of this tutorial we can do some cool stuff with events and profiles.

UPDATE: The second part can be found here

This is liverail.net

Liverail.net is the personal and technical blog of Stuart Eccles.

Stuart is the technical director of Made By Many, a London UK based next-gen website and social media consultancy and a conversationalist on Ruby On Rails, Flex, AIR, RIA and agile project techniques.

You can follow me on twitter

Categories:

• Home (15)
• RubyOnRails (15)
• RailsDAV (7)
• Liverail (8)
• Facebook (4)
• Apple (6)
• London (5)
• Web2.0 (6)
• Java (0)
• Enterprise2.0 (2)
• Flex (11)
• Technical Architecture (0)
• Personal (2)
• Rants (2)

Archive:

Friend's Blogs

• Saltyann.com
• Knitware Blog
• FlashGen (Mike Jones)
• BitTube (David Williamson)
• CreativeResonance (Rich Marsh)
• Simon I'Anson
• William Owen
• Alex MacCaw
• Daniel Todd
• Doc Rogers Blog
• ólafur gauti guðmundsson Blog
• Tidalbarrier Project

Reading List

• The Daily Social
• TechCrunch
• Business 2.0
• Presentation Zen
• Guy Kawasaki
• Ajaxian
• Planet Ruby On Rails
• The Server Side
• Macromedia WebLogs
• Caboose Blog
• The Rails Way
• Flex.org

Search:

Donate:

If you would like to donate to RailsDAV of any of the projects/plugins on liverail, or if you liked the tutorials so much you want to buy me a beer, please feel free to use this Paypal button

© 2008 Stuart Eccles | Design by Andreas Viklund