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module ActiveRecord
  module ConnectionAdapters
    class PostgreSQLAdapter < AbstractAdapter
      class StatementPool < ConnectionAdapters::StatementPool
        def connection_active?
          @connection.query 'SELECT 1'
          true
        rescue PGError
          false
        end

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# Add the following to /etc/hosts:
127.0.0.1 local.s3.endpoint local-bucket.local.s3.endpoint

# Run the following in your rails console, in order to create a bucket:
s3=AWS::S3.new(
  :access_key_id     => 'anything',
  :secret_access_key => 'anything',
  :s3_endpoint       => 'local.s3.endpoint',
  :s3_port           => 4567,
  :use_ssl           => false

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if Rails.env.production?
  # silence the deprecation warnings on Heroku
  # Thanks to: https://gist.github.com/2237443
  ActiveSupport::Deprecation.behavior = lambda do |msg, stack|
    unless /vendor\/plugins/ =~ msg
      ActiveSupport::Deprecation::DEFAULT_BEHAVIORS[:stderr].call(msg,stack) # whichever handlers you want - this is the default
    end
  end
end

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  def images
    
    ... authenticate
    ... get @images from somewhere
    ... get user_id and brochure_id from somewhere
    
    if stale?(:etag => Image.images_key(@images, "#{user_id},#{brochure_id}"))
      respond_to do |format|
        format.json { 
          response.headers['Cache-Control'] = 'public, max-age=2592000' # 1 month

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  # note the caller ensures that "prefix" consists of something
  # uniquely identifying the user/brochure combination
  def images_key(images, prefix = "")
    key = "#{prefix} "
    images.each do |im| 
      key += "#{im.file.size} #{im.file_updated_at}"
    end
    Digest::MD5.new.hexdigest(key)
  end

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// Thanks to http://cubiq.org/add-to-home-screen
var isSafari     = navigator.appVersion.match(/Safari/gi);
var isStandalone = navigator.standalone;

// Earlier I had been labouring with:
var isStandalone = navigator.userAgent.match(/WebKit.*Mobile/) && !navigator.userAgent.match(/Safari/);

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--- a/jquery.flips.js
+++ b/jquery.flips.js
@@ -140,7 +140,7 @@
                        
                        if( this.History.getState().url.queryStringToJSON().page !== page ) {
                                        
-                               this.History.pushState( null, null, '?page=' + page );
+                               // this.History.pushState( null, null, '?page=' + page );

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<div id="flip" class="container">
  <div class="loading" style="position: absolute; left: 100px; top: 200px; font-size: 15px;">
    <div id="loading">loading...</div>
  </div>
</div>

...

<script type="text/javascript">
$(function () {

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class Event < ActiveRecord::Base
	...
	has_many :options, :class_name => "EventOption", ...
	accepts_nested_attributes_for :options
	...
end

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<%= form_for @event, :url => (@event.new_record? ? events_path : event_path(@event)) do |f| %>
	...
	<%= f.fields_for :options, @event.options do |f2| %>
		...
		<%= f2.text_field :name %>
		...
	<$ end %>
	...
<% end %>