DivePanda Heroku Error

dives_controller.rb

class DivesController < ApplicationController
  # GET /dives
  # GET /dives.xml
  def index
    @user = User.where(:facebook_id => current_user.identifier).first
    @dives = Dive.where(:user_id => @user.id)

    respond_to do |format|
      format.html # index.html.erb
      format.xml  { render :xml => @dives }
    end
  end

  # GET /dives/1
  # GET /dives/1.xml
  def show
    @dive = Dive.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @dive }
    end
  end

  # GET /dives/new
  # GET /dives/new.xml
  def new
    @dive = Dive.new
    
    @user = User.where(:facebook_id => current_user.identifier).first
    
    respond_to do |format|
      format.html # new.html.erb
      format.xml  { render :xml => @dive }
    end
  end

  # GET /dives/1/edit
  def edit
    @user = User.where(:facebook_id => current_user.identifier).first
    #@user = User.find_by_facebook_id(current_user.identifier)
    @dive = Dive.find(params[:id])
  end

  # POST /dives
  # POST /dives.xml
  def create
  
    #@user = User.where(:facebook_id => current_user.identifier) 
    #@dive = @user.dives.create(params[:dive])
    
    #@dive = Dive.new(params[:dive])

    respond_to do |format|
      if @dive.save
        format.html { redirect_to(@dive, :notice => 'Your Dive was successfully created.') }
        format.xml  { render :xml => @dive, :status => :created, :location => @dive }
      else
        format.html { render :action => "new" }
        format.xml  { render :xml => @dive.errors, :status => :unprocessable_entity }
      end
    end
  end

  # PUT /dives/1
  # PUT /dives/1.xml
  def update
    @dive = Dive.find(params[:id])

    respond_to do |format|
      if @dive.update_attributes(params[:dive])
        format.html { redirect_to(@dive, :notice => 'Dive was successfully updated.') }
        format.xml  { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml  { render :xml => @dive.errors, :status => :unprocessable_entity }
      end
    end
  end

  # DELETE /dives/1
  # DELETE /dives/1.xml
  def destroy
    @dive = Dive.find(params[:id])
    @dive.destroy

    respond_to do |format|
      format.html { redirect_to(dives_url) }
      format.xml  { head :ok }
    end
  end
end

Gemfile

source 'http://rubygems.org'

# gem 'rails', '3.0.6'
gem 'rails'
# gem 'rake', '0.9.2.2'
gem 'rake'
gem 'fb_graph'
gem 'jquery-rails'
gem 'magic_encoding'

group :development do
  gem 'sqlite3-ruby', :require => 'sqlite3'
  gem 'ruby-debug'
end

group :production do
  gem 'pg'
#  gem 'sqlite3-ruby', :require => 'sqlite3'
  gem 'thin'
end

# Deploy with Capistrano
# gem 'capistrano'

Gemfile.lock

GEM
  remote: http://rubygems.org/
  specs:
    actionmailer (3.2.3)
      actionpack (= 3.2.3)
      mail (~> 2.4.4)
    actionpack (3.2.3)
      activemodel (= 3.2.3)
      activesupport (= 3.2.3)
      builder (~> 3.0.0)
      erubis (~> 2.7.0)
      journey (~> 1.0.1)
      rack (~> 1.4.0)
      rack-cache (~> 1.2)
      rack-test (~> 0.6.1)
      sprockets (~> 2.1.2)
    activemodel (3.2.3)
      activesupport (= 3.2.3)
      builder (~> 3.0.0)
    activerecord (3.2.3)
      activemodel (= 3.2.3)
      activesupport (= 3.2.3)
      arel (~> 3.0.2)
      tzinfo (~> 0.3.29)
    activeresource (3.2.3)
      activemodel (= 3.2.3)
      activesupport (= 3.2.3)
    activesupport (3.2.3)
      i18n (~> 0.6)
      multi_json (~> 1.0)
    arel (3.0.2)
    attr_required (0.0.5)
    builder (3.0.0)
    columnize (0.3.6)
    daemons (1.1.8)
    erubis (2.7.0)
    eventmachine (0.12.10)
    fb_graph (2.4.12)
      httpclient (>= 2.2.0.2)
      rack-oauth2 (>= 0.14.4)
      tzinfo
    hike (1.2.1)
    httpclient (2.2.5)
    i18n (0.6.0)
    journey (1.0.3)
    jquery-rails (2.0.2)
      railties (>= 3.2.0, < 5.0)
      thor (~> 0.14)
    json (1.7.1)
    linecache (0.46)
      rbx-require-relative (> 0.0.4)
    magic_encoding (0.0.2)
    mail (2.4.4)
      i18n (>= 0.4.0)
      mime-types (~> 1.16)
      treetop (~> 1.4.8)
    mime-types (1.18)
    multi_json (1.3.4)
    polyglot (0.3.3)
    rack (1.4.1)
    rack-cache (1.2)
      rack (>= 0.4)
    rack-oauth2 (0.14.4)
      activesupport (>= 2.3)
      attr_required (>= 0.0.5)
      httpclient (>= 2.2.0.2)
      i18n
      json (>= 1.4.3)
      rack (>= 1.1)
    rack-ssl (1.3.2)
      rack
    rack-test (0.6.1)
      rack (>= 1.0)
    rails (3.2.3)
      actionmailer (= 3.2.3)
      actionpack (= 3.2.3)
      activerecord (= 3.2.3)
      activeresource (= 3.2.3)
      activesupport (= 3.2.3)
      bundler (~> 1.0)
      railties (= 3.2.3)
    railties (3.2.3)
      actionpack (= 3.2.3)
      activesupport (= 3.2.3)
      rack-ssl (~> 1.3.2)
      rake (>= 0.8.7)
      rdoc (~> 3.4)
      thor (~> 0.14.6)
    rake (0.9.2.2)
    rbx-require-relative (0.0.9)
    rdoc (3.12)
      json (~> 1.4)
    ruby-debug (0.10.4)
      columnize (>= 0.1)
      ruby-debug-base (~> 0.10.4.0)
    ruby-debug-base (0.10.4)
      linecache (>= 0.3)
    sprockets (2.1.3)
      hike (~> 1.2)
      rack (~> 1.0)
      tilt (~> 1.1, != 1.3.0)
    sqlite3 (1.3.6)
    sqlite3-ruby (1.3.3)
      sqlite3 (>= 1.3.3)
    thin (1.3.1)
      daemons (>= 1.0.9)
      eventmachine (>= 0.12.6)
      rack (>= 1.0.0)
    thor (0.14.6)
    tilt (1.3.3)
    treetop (1.4.10)
      polyglot
      polyglot (>= 0.3.1)
    tzinfo (0.3.33)

PLATFORMS
  ruby

DEPENDENCIES
  fb_graph
  jquery-rails
  magic_encoding
  rails
  rake
  ruby-debug
  sqlite3-ruby
  thin

production.rb

DivePanda::Application.configure do
  # Settings specified here will take precedence over those in config/environment.rb

  # The production environment is meant for finished, "live" apps.
  # Code is not reloaded between requests
  config.cache_classes = true

  # Full error reports are disabled and caching is turned on
  config.consider_all_requests_local       = false
  config.action_controller.perform_caching = true

  # Specifies the header that your server uses for sending files
  config.action_dispatch.x_sendfile_header = "X-Sendfile"

  # For nginx:
  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect'

  # If you have no front-end server that supports something like X-Sendfile,
  # just comment this out and Rails will serve the files

  # See everything in the log (default is :info)
  # config.log_level = :debug

  # Use a different logger for distributed setups
  # config.logger = SyslogLogger.new

  # Use a different cache store in production
  # config.cache_store = :mem_cache_store

  # Disable Rails's static asset server
  # In production, Apache or nginx will already do this
  config.serve_static_assets = true

  # Enable serving of images, stylesheets, and javascripts from an asset server
  # config.action_controller.asset_host = "http://assets.example.com"

  # Disable delivery errors, bad email addresses will be ignored
  # config.action_mailer.raise_delivery_errors = false

  # Enable threaded mode
  # config.threadsafe!

  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
  # the I18n.default_locale when a translation can not be found)
  config.i18n.fallbacks = true

  # Send deprecation notices to registered listeners
  config.active_support.deprecation = :notify
end