ActionMailer with ActiveRecord validation

I wanted to be able to send out a mail from a controller but also validate the incoming args in a clean way. Like so…

class MessagesController < ActionController::Base

def deliver
  @message = Message.build(params[:message])
  if @message.deliver
    redirect_to home_path
  else
    render :action
  end
end

ActionMailer::Base hides the initialize methods in method_missing and most of the time you are calling ActionMailer::Base.deliver_mymail(args). This allows you to specify all of the standard actionmailer settings in Message.build and return a Message object.

class Message < ActionMailer::Base

  include Validatable
  validates_presence_of :from, :body

  def self.build(args = {})
    new('default', args)
  end

  def self.action_mailer_methods
    return [
      :bcc,
      :body,
      :cc,
      :charset,
      :content_type,
      :from,
      :reply_to,
      :headers,
      :implicit_parts_order,
      :mime_version,
      :recipients,
      :sent_on,
      :subject,
      :template
    ]
  end

  def default(args)
    new_args = args.clone
    new_args.each do |k,v|
      if self.class.action_mailer_methods.include?(k)
        send(k, new_args.delete(k))
      end
    end

    if body.kind_of?(Hash)
      @body.merge!(new_args)
    end

  end

  def deliver
    if self.valid?
      return deliver!
    else
      return false
    end
  end

end

Pandora console

The Pandora

…the most powerful gaming handheld there is….

  • ARM® Cortexâ„¢-A8 600Mhz+ CPU running Linux
  • 430-MHz TMS320C64x+â„¢ DSP Core
  • PowerVR SGX OpenGL 2.0 ES compliant 3D hardware
  • 800×480 4.3" 16.7 million colours touchscreen LCD
  • Wifi 802.11b/g, Bluetooth & High Speed USB 2.0 Host
  • Dual SDHC card slots & SVideo TV output
  • Dual Analogue and Digital gaming controls
  • 43 button QWERTY and numeric keypad
  • Around 10+ Hours battery life

Now, I’ll need some more freelance work to get my hands on one of these.

Oooh....erb templates in javascript

Found this ERB for jQuery script this morning from Dan Webb

http://gist.github.com/211964

// ERB style templates for jQuery in hardly any code.
//
// Based on http://ejohn.org/blog/javascript-micro-templating/
// 
// A tiny and simple plugin to allow erb style template rendering within jQuery.
// 
// Make a template:
// 
// <script type="text/html" id="template1">
// <% $.each(items, function(i, image) { %>
//   <p><img src="<%= image.media.m %>" alt="<%= image.title %>"></p>
// <% }); %>
// </script>
// 
// Render the template into the dom with some data:
// 
// <script type="text/javascript">
// jQuery(function($) {
//   $.getJSON("http://api.flickr.com/services/feeds/photos_public.gne?tags=jordan%20III&format=json&jsoncallback=?", function(data) {
//     $('#test').render('template1', data);
//   });
// });
// </script>
//
// Alternatively, you can load templates from files:
//
// $('#test').render('template.ejs', data);

jQuery(function($) {
  var cache = {};
  
  function compile(source) {
    return new Function("obj",
          "var p=[],print=function(){p.push.apply(p,arguments);};" +
     
          "with(obj){p.push('" +
     
          source
            .replace(/[\r\t\n]/g, " ")
            .split("<%").join("\t")
            .replace(/((^|%>)[^\t]*)'/g, "$1\r")
            .replace(/\t=(.*?)%>/g, "',$1,'")
            .split("\t").join("');")
            .split("%>").join("p.push('")
            .split("\r").join("\\'")
        + "');}return p.join('');");
  }
  
  function load(template) {
    if (!(/\W/).test(template)) {
      return compile($("#" + template).html());
    } else {
      var source;
    
      $.ajax({
        async: false,
        url: template,
        dataType: 'text',
        success: function(data) {
          source = data;
        }
      });
    
      return compile(source);
    }
  }
  
  $.template = function(template, data) {
    var fn = cache[template] = cache[template] || load(template);
    
    if (data) return fn(data);
  }
  
  $.fn.render = function(str, data) {
    return this.each(function() {
      $(this).html($.template(str, data));
    });
  };
});

Lazarus, pimping up music since 2009

Rails Way - Das magazin fur Ruby on Rails

I found this little gem in a bog standard boring, run of the mill newsagents in Berlin, Zoologischer Garten. Perhaps Germany is more tech friendly but having monthly Ruby on Rails, PHP, .Net and Java monthlies is is quite crazy for what would be a small readership.

Available at http://it-republik.de/railsway/magazin-ausgaben/Ruby-on-Rails-000281.html

Git remote branches

Nice little and verbose script to aid with the creation of remote git repos.

http://blog.carlmercier.com/2008/01/25/no-nonsense-git-part-1-git-remote-branch/

git-remote-branch create sv1.8

or to track an already existing remote branch

git branch --track sv1.8 origin/sv1.8

IEH8

Why does IE8 ignore this, grrrrrrrrr.

<!--[if lt IE 8]>
<script src="http://oursite.com/ie8.min.js" type="text/javascript"></script>
<![endif]-->

It seems that the ie8.js script doesn’t like being used inside a frame.
http://dean.edwards.name/weblog/2008/01/ie7-2/

Hi dean,

First of all great work. I have a problem when I use your script inside a frame (ugly, I know). I get a permission denied on ‘if(/ie7_off/.test(top.location.search)||k<5)’.

Any thoughts on a quick fix?

Thanks, Ronald Moolenaar 

YAML defaults

I really do love the way you can add defaults in YAML

development: &defaults
  consumer_key: randomzombieaction
  consumer_secret: morerandomzombieaction
test: 
  <<: *defaults
staging:
  <<: *defaults
production:
  <<: *defaults

Stewie Vs Zombie

Who will win?

Donkey Kong Vs. Stewie

Who will win?