#26 - 6 min

#47 - 9 min

#48 - 10 min

#62 - 11 min

#134 - 7 min

#140 - 4 min

#152 - 9 min

#154 - 8 min

This are the numbers of Railscasts episodes that every Rails newbie should watch (obligatory for every newcommer in our company).  

If you are missing Webrats http_accept method after migrating from Webrat to Capybara this c’d be solution for rack based driver:

page.driver.header "Accept", "application/javascript"

Tired of typing User.find_by_verylongattribute_name(‘something’) into rails console? This little alias made my day: 

class User < ActiveRecord::Base

  def self.[](arg)
    self.find_by_userlogin(arg)
  end

end

Usage:

>> User['madsheep']
=> #<User id: 1, userlogin: "madsheep">

While developing our latest application, we discovered that Mongoid doesn’t save embedded objects when their parent is saved. On the GitHub page of this issue there were suggested some solutions and it appears that one posted by mcasimir works very well. What happened to be the next problem is that with this solution comes the issue with saving attachments’ filenames. We’ve found a solution somewhere on GitHub and changed it a little so it works with overriding filenames :

 
  after_validation :extract_filename

  def extract_filename
    img_original_filename = img.instance_variable_get("@original_filename")
    if self.img.class.filename and img_original_filename.present?
      self.img_filename = self.img.class.filename
    elsif img_original_filename.present?
      self.img_filename = img_original_filename
    end
  end

Each time someone thinks it’s a good idea to create model without timestamps or use habtm instead of hmt - Mighty God kills little kitten.

http://proxylocal.com/

http://adam.heroku.com/past/2009/2/11/taps_for_easy_database_transfers/

Those two solutions can be easily combined to transfer mysql database from one development machine to another (no more nasty dump emailing/sending/sharing etc.)

On first machine:

taps server mysql://db_user:db_pass@localhost/database_name online_user online_pass -p 5000
proxylocal 5000

Last command will pop out an address (like http://tz87.t.proxylocal.com/ or similar)

And second machine (to obtain sqlite database):

taps pull sqlite://development.sqlite3 http://online_user:online_pass@tz87.t.proxylocal.com

How cool is that?

set_property :delta_column => 'another_delta_field'

Adding this property to sphinx indexes on your model allows you to use different field name then ‘delta’ for delta indexing - useful when two stages of your application share the same database.

Very simple way to use FQL in Fgraph (https://github.com/jugend/fgraph) with query caching.

require 'digest/sha1'
module FGraph
  class Client
    def fql(query)
      @cached_query ||= {}
      @cached_query[Digest::SHA1.hexdigest(query)] ||= HTTParty.get("https://api.facebook.com/method/fql.query", :query => {:query => query, :access_token => self.options[:access_token], :format => :json} )
    end   
  end
end

Small brainstorming about solutions to do even more interactive Web apps.