Notes

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ex:

require 'rubygems'
require 'bundler'
require 'active_support/core_ext'
require 'pp'

xml  = 
'<test id="appears">
  <comment id="doesnt appear">
    it worked
  </comment>
  <comment>
   see!
  </comment>
  <comment />
</test>'

hash =...

It's over at http://apidock.com/rails/ActiveSupport/TimeZone/new/class

In my view I wanted to do this <%= select_hour(@hour, :start => 8, :end => 12) %> but did not work. I looked at the documentation and have not seen anything like it. http://api.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html#method-i-select_hour

So I studied how it worked this helper....

I like drogus idea. But I wanted a cleaner one, so I created an unobtrusive JQuery script to have the same functionality.

Example Usage:

<%= form_for @post do |form| %>
Title: <%= form.text_field :title %>
Body: <%= form.text_field :body %>

Tags:
<div id="tag-list"></div>...

Code

root :to => 'projects#index', :as => 'foobar'

will generate a helper

foobar_path

In actions that may or may not be loaded via ajax I use: render :layout => !request.xhr? For an entire controller I might use something like: layout :has_layout?

private
def has_layout?
  request.xhr? ? false : controller_name
end

What seems unusual is that layout true...

replaced by "class_attibute": http://apidock.com/rails/v3.2.1/Class/class_attribute

replaced by "class_attibute": http://apidock.com/rails/v3.2.1/Class/class_attribute

This is a very useful method if you want to to use a scope through an association:

class Book < ActiveRecord::Base
scope :available, where(:available => true)
end

class Author < ActiveRecord::Base
has_many :books
scope :with_available_books, joins(:books).merge(Book.availab...

If you want to override previously set order (even through default_scope), use reorder() instead.

E.g.

User.order('id ASC').reorder('name DESC')

would ignore ordering by id completely

===Controller

op = Operation.find(params[:id])
fname = "operation_#{op.id}_#{DateTime.now.to_i}.csv"
send_data op.export(params[:url_type]), 
  :type => 'text/csv; charset=iso-8859-1; header=present',
  :disposition => "attachment; filename=#{fname}.csv"

=== export_csv

de...

To use exists scopes on default_scope , you can use something like:

class Article < ActiveRecord::Base
scope :active, proc {
  where("expires_at IS NULL or expires_at > '#{Time.now}'")
}

scope :by_newest, order("created_at DESC")

default_scope by_newest
end

But, if yo...

In Rails 3.1 and higher, just use ruby's SecureRandom, e.g.

Before

ActiveSupport::SecureRandom.hex

After

SecureRandom.hex

If you're looking to take an array like [ 'don', 'draper' ] And get 'don draper'

Then use join instead: [ 'don', 'draper' ].join( ' ' )

#=> 'don draper'

Just as an FYI this function is destructive to the original String object.

name = 'draper' #=> "draper"

name.insert( 0, 'don ' ) #=> 'don draper'

name #=> 'don draper'

Just change your

proxy_owner

calls to

@association.owner

Found it here: http://mileszs.com/deprecation-warnings-for-proxyowner-in-rails

http://www.youtube.com/watch?feature=player_embedded&v=rQIJ0WJXOr8

http://www.youtube.com/watch?feature=player_embedded&v=rQIJ0WJXOr8