// Trying out the system, here is just a simple ActiveRecord class

class Task < ActiveRecord::Base 
  belongs_to :user
  belongs_to :location
  belongs_to :project
end .

// Mixes in a to_conditions method to ActiveRecord::Base. Converts the attributes of an AR object to a
// ActiveRecord::Base#find :conditions hash. Useful for comparing AR objects, especially when looking for
// duplicates.
// E.g.
//
// if not Post.find(:all, :conditions => my_post.conditions).empty?
// puts "Duplicate found"
// end

module Bezurk #:nodoc:
  module ActiveRecord #:nodoc:
    module Extensions
      def to_conditions
        attributes.inject({}) do |hash, (name, value)|
          hash.merge(name.intern => value)
        end
      end
      alias :to_conditions_hash :to_conditions
    end
  end
end

ActiveRecord::Base.send(:include, Bezurk::ActiveRecord::Extensions)

// description of your code here

#codename generated from the dictionary
REVISION_NUMBER = `svn info`.split("\n")[4][/\d+/].to_i
APP_CODENAME  = IO.readlines("/usr/share/dict/words")[REVISION_NUMBER]

// description of your code here
Add this to your environment.rb file for a dead easy way to get your subversion revision into your application.

APP_VERSION  = IO.popen("svn info").readlines[4]

From Dylan Stamat's post on the Ruby on Rails list


Within my "login.rjs" template that get's invoked after my login process, it returns to the same page with an error message on error, or... if the login was successful, it needs to "redirect" to another controller... which is pretty much impossible to do otherwise. so, my " login.rjs" looks like:

if @logged_in_client
  page.replace_html "message", :partial => 'shared/bad_login'
else
  page.redirect_to "whatever you want here"
end

------ End Message--------
Here is my two cents:
Technically, you can do this without a RJS template at all, because it is such a simple example. Use this in your controller

render :update do |page|
  if @logged_in_client
    page.replace_html "message", :partial => 'shared/bad_login'
  else
    page.redirect_to "whatever you want here"
  end
end

Taken from Norman Timmler's example on the ruby on rails mailing list.


Take two text fields for example:

# view
<%= form_tag :controller => :posts, :action => create %>
 <%= text_field("post", "title", "size" => 20) %>
 <%= text_field("user", "email", "size" => 20) %>
<%= end_form_tag %>

# posts_controller
class PostsController < ApplicationController
 def create
   @post = Post.create(params[:post])
   @user = User.create(params[:user])
   @post.users << @user
 end
end

In the controller the params hash has one key for every object (user,
post) in your form. As a values of this key you find a hash having a
key-value pair for every object attribute (title, email).

This way you can submit multiple objects via one form.

Taken from Norman Timmler's example on the Ruby on Rails mailing list:

def file=(new_file)
 new_file.rewind
 image = Magick::Image::from_blob(new_file.read).first
end