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Ubuntu 7.10: bootstrap a Ruby on Rails stack

// get started with ubuntu 7.1
// e.g. on a new slice from http://slicehost.com !

# 1) make yrself a user and stop being root

# 2) main web stack + ruby
sudo aptitude install -y make screen
sudo aptitude install -y apache2 php5 mysql-server
sudo aptitude install -y subversion postfix
sudo aptitude install -y ruby1.8 ruby1.8-dev rubygems irb
sudo aptitude install -y imagemagick librmagick-ruby1.8 librmagick-ruby-doc libfreetype6-dev xml-core

# 3) gemz
# rubygems appears to be broken as hell. 
# gem update --system does squat
# had to manually d/l rubygems 1.0.1, ruby setup.rb
wget http://rubyforge.org/frs/download.php/29548/rubygems-1.0.1.tgz
tar xzvf rubygems-1.0.1.tgz
cd rubygems-1.0.1
sudo ruby setup.rb
sudo gem install rails mongrel merb map_by_method

to ruby rails sysadmin config rubyonrails ubuntu linux app stack install by jamiew on Jan 15, 2008

jQuery and Rails' respond_to

// Just throw this at the bottom of your application.js and you’re good to go: all jQuery ajax requests will trigger the wants.js block of your respond_to declaration, exactly like you’d expect. Enjoy.
// via: http://ozmm.org/posts/jquery_and_respond_to.html

jQuery.ajaxSetup({ ‘beforeSend’: function(xhr) {xhr.setRequestHeader(“Accept”, “text/javascript”)} })

to ruby rails javascript rubyonrails ajax js jquery respond_to by jamiew on Jan 12, 2008

Never render the full layout in a Rails view when called via AJAX

Essential for degradable javascript, when one never knows if a view or partial is being called via XmlHttpRequest or not. Throw the below code in your ApplicationController (application.rb)

More info in this blog post

def render(*args)
        args.first[:layout] = false if request.xhr? and args.first[:layout].nil?
        super
end

to ruby rails javascript rubyonrails ajax programming jquery degradation degradable by jamiew on Sep 09, 2007

Wraps a block of content in an html tag, only if it has content present

Fed up of empty wrapper html tags when content isn't there? Then use this Rails helper...

  def tag_unless_empty(html_tag, options = {}, &block)
    html_options = options.stringify_keys

    if block_given?
      content = capture(&block)
      unless content.strip.empty?
        concat(tag(html_tag, html_options, true), block.binding)
        concat(content, block.binding)
        concat("#{html_tag}>", block.binding)
      end
    end
  end

Example:

<% tag_unless_empty :div, :class => "css_class" do %>
   <%# Nothing actually rendered here %>
   <%# or here %>
<% end %>

produces nothing, whereas

<% tag_unless_empty :div, :class => "css_class" do %>
   <%= 'Something rendered here' %>
<% end %>

produces

<div class="css_class">Something rendered herediv>

to rails rubyonrails by timbo on May 24, 2007

ajax_request? method to XHR detection

A oneline helper I put in all of my apps. Looks for HTTP headers that signal you're being called via an XmlHttpRequest. I use it for instant degradable AJAX by rendering a template if it's as usual but just rendering a partial if they just want that part!

  def ajax_request?
    request.env['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest' || params[:ajax]  # params[:ajax] for safe-keeping, FIXME if it works w/ all browsers
  end

to ruby rails rubyonrails ajax xhr xmlhttprequest by jamiew on Jan 23, 2007 1 Comments

Upload Image To Database

// Code To Upload an image to a database and then update its contents.

# Create an ew classified and attach an image with it.
def create
  image_types = ["image/jpeg", "image/pjpeg", "image/gif","image/png", "image/x-png"]
  @categories = Category.find(:all)
  @classified = Classified.new(params[:classified])
  @classified.user = session[:user]
  unless params[:classified][:picture].blank?
    if (image_types.include?params[:classified][:picture].content_type.chomp)
      @classified.picture = params[:classified][:picture].read
    else
      @classified.errors.add(:picture,  "Photo doesn't seem to be JPG, GIF, or PNG. please ensure it is a valid image file.")
      render :action => 'new'
      return
    end
  end

  if @classified.save
    redirect_to :action => 'list'
  else 
    render :action => 'new'
  end
end


# Update Method So user can change the image associated with their classified
def update
  image_types = ["image/jpeg", "image/pjpeg", "image/gif", "image/png", "image/x-png"]
  @classified = Classified.find(params[:id])
  @categories = Category.find(:all)
  
  if @classified.update_attributes(params[:classified])
    unless params[:classified][:picture].blank?
      if (image_types.include?params[:classified][:picture].content_type.chomp)
        @classified.picture = params[:classified][:picture].read
      else
        @classified.errors.add(:picture, " doesn't seem to be JPG, GIF, or PNG. please ensure it is a valid image file.")
        render :action => 'edit'
        return
      end
    end
    
    flash[:notice] = 'Classified was successfully updated.'
    redirect_to :action => 'show', :id => @classified
  else
    render :action => 'edit'
  end
end

to mysql rubyonrails database upload by carpeaqua on Nov 02, 2006

Extend FileColumn to work with ActsAsPartitionnedID

# environment.rb

module FileColumn
  class PermanentUploadedFile    
    alias_method :orig_move_from, :move_from
    def move_from(local_dir, just_uploaded)
      FileUtils.rm_rf @dir
      
      part_it_options = @instance.class.acts_as_partitioned_id_options
      partition_length = part_it_options[:digits] / part_it_options[:partitions]
      #last_partition = @dir[-partition_length.to_i..-1]
      the_rest = @dir[0...-partition_length.to_i]
      FileUtils.mkpath the_rest
      
      FileUtils.mv local_dir, @dir
      @just_uploaded = just_uploaded
    end
    
    private
    alias_method :orig_relative_path_prefix, :relative_path_prefix
    def relative_path_prefix
      raise RuntimeError.new("Trying to access file_column, but primary key got lost.") if @instance.partitioned_id.to_s.empty?
      @instance.partitioned_id.to_s
    end
  end
end

to ruby rails rubyonrails by androse on Sep 04, 2006

Extend FileColumn to work with ActsAsPartitionnedID

# environment.rb

module FileColumn
  class PermanentUploadedFile    
    alias_method :orig_move_from, :move_from
    def move_from(local_dir, just_uploaded)
      FileUtils.rm_rf @dir
      
      part_it_options = @instance.class.acts_as_partitioned_id_options
      partition_length = part_it_options[:digits] / part_it_options[:partitions]
      #last_partition = @dir[-partition_length.to_i..-1]
      the_rest = @dir[0...-partition_length.to_i]
      FileUtils.mkpath the_rest
      
      FileUtils.mv local_dir, @dir
      @just_uploaded = just_uploaded
    end
    
    private
    alias_method :orig_relative_path_prefix, :relative_path_prefix
    def relative_path_prefix
      raise RuntimeError.new("Trying to access file_column, but primary key got lost.") if @instance.partitioned_id.to_s.empty?
      @instance.partitioned_id.to_s
    end
  end
end

to ruby rails rubyonrails by androse on Sep 04, 2006

Extend FileColumn to work with ActsAsPartitionnedID

# environment.rb

module FileColumn
  class PermanentUploadedFile    
    alias_method :orig_move_from, :move_from
    def move_from(local_dir, just_uploaded)
      FileUtils.rm_rf @dir
      
      part_it_options = @instance.class.acts_as_partitioned_id_options
      partition_length = part_it_options[:digits] / part_it_options[:partitions]
      #last_partition = @dir[-partition_length.to_i..-1]
      the_rest = @dir[0...-partition_length.to_i]
      FileUtils.mkpath the_rest
      
      FileUtils.mv local_dir, @dir
      @just_uploaded = just_uploaded
    end
    
    private
    alias_method :orig_relative_path_prefix, :relative_path_prefix
    def relative_path_prefix
      raise RuntimeError.new("Trying to access file_column, but primary key got lost.") if @instance.partitioned_id.to_s.empty?
      @instance.partitioned_id.to_s
    end
  end
end

to ruby rails rubyonrails by androse on Sep 04, 2006

Rails Subversion First Checkout

// I use this for checking out a new rails project

svn checkout http://studicious.com/svn/trunk %1
svn remove log/*
svn commit -m "Removed log files"
svn propset svn:ignore "*.log" log/
svn update log/
svn commit -m "Ignoring log files"
svn remove tmp/*
svn propset svn:ignore "*" tmp/
svn update tmp/
svn commit -m "Ignoring temp folder"

to svn rubyonrails by winton on Aug 02, 2006

Custom Validation in ActiveRecord

// allows adding errors in methods other than validate

  def other_errors=(err)
    write_attribute(:other_errors,Array.new) if !self.other_errors
    self.other_errors[self.other_errors.length] = err
  end
        
  def other_errors
    read_attribute(:other_errors)
  end

  def validate
    if self.other_errors
      self.other_errors.each {|x| errors.add_to_base(x)}
      return
    end
    return if !errors.empty?
  end

to activerecord rubyonrails validation by winton on Jul 22, 2006

create a rails app from rails trunk, optionally committing to a subversion repository

I name this script railstrunk on my machine. So, usage would be:

railstrunk app_name

That creates a rails application under app_name.

If app_name is a subversion working copy, rails is set as an external and generated files are committed, and some ignore properties are set.

Here's how I'd go about creating a versioned rails app:

mkdir -p happy_app happy_app/trunk happy_app/tags happy_app/branches 
svn import happy_app http://myserver/myrepos/happy_app -m "Layout for happy_app"
rm -rf happy_app
svn co http://myserver/myrepos/happy_app/trunk happy_app
railstrunk happy_app

$rails_dir is set at the beginning of script, and it should be a path to a working copy of rails trunk on your machine. It's merely used to speed things up, it's not necessary.

Notice I remove the silly public/index.html from the generated app.

And now the code:

#!/bin/bash

rails_dir=~/code/ruby/rails

if [ $# != 1 ]; then
  echo "Usage: $0 app_name"
  echo
  echo "Creates a rails application under app_name."
  echo
  echo "If app_name is a subversion working copy, rails is set as an external"
  echo "and generated files are committed."
  echo
  echo "If $rails_dir exists, things are sped up by either symlinking it"
  echo "(for non-versioned apps) or copying it to the vendor dir."
  echo
  echo "$rails_dir should be a rails trunk working copy."
  exit
fi

dir=$1
mkdir -p $dir
cd $dir

if [ -n "`ls`" ]; then
  echo "Can't create app: $dir is not empty." >&2
  exit 1
fi

if [ -d $rails_dir ]; then
  if [ "`svn info $rails_dir 2>/dev/null | grep URL:`" != "URL: http://dev.rubyonrails.org/svn/rails/trunk" ]; then
    echo "$rails_dir is not a rails trunk working copy. Not going to use it." >&2
  elif [ -n "`svn st $rails_dir`" ]; then
    echo "$rails_dir is modified. Not going to use it." >&2
  else
    use_rails_dir=1
  fi
fi

if [ -z "`svn info 2>/dev/null`" ]; then
  mkdir vendor
  if [ -n "$use_rails_dir" ]; then
    ln -s $rails_dir vendor/rails
    cd vendor/rails
    svn up
    cd ../..
  else
    svn co http://dev.rubyonrails.org/svn/rails/trunk vendor/rails
  fi
  ruby vendor/rails/railties/bin/rails .
  rm public/index.html
else
  svn mkdir vendor
  svn ps svn:externals 'rails http://dev.rubyonrails.org/svn/rails/trunk' vendor
  svn ci -m 'set rails external to rails trunk'
  [ -n "$use_rails_dir" ] && cp -r $rails_dir vendor/rails
  svn up
  ruby vendor/rails/railties/bin/rails .
  rm public/index.html
  rm log/*
  mv config/database.yml config/database.yml.sample
  svn add . --force
  svn ps svn:ignore '*' tmp/cache tmp/pids tmp/sessions tmp/sockets
  svn ps svn:ignore 'database.yml' config
  svn ps svn:ignore '*.log' log
  svn ci -m "- created rails app
- moved database.yml to database.yml.sample
- deleted public/index.html
- ignored logs and tmp"
  cp config/database.yml.sample config/database.yml
fi

to ruby rails shell svn bash subversion rubyonrails by cch on Jul 12, 2006

ActiveRecord attribute calls interception

I need to intercept attribute calls and add some additional info to them.

class ActiveRecord::Base
  def self.multilingual_field(fieldname)
    module_eval <<-end_eval
      def #{fieldname}
        send("#{fieldname}_\#{Locale.language.short_name}")
      end

      def #{fieldname}=(value)
        send("#{fieldname}_\#{Locale.language.short_name}=",value)
      end
    end_eval
  end
end

to activerecord rubyonrails by iwanttodeletemyaccount on Jul 03, 2006

Default content-type in Rails

I always forget this.

class ApplicationController < ActionController::Base
  include AuthenticatedSystem
  
  before_filter :set_encoding
  
  private
    def set_encoding
      @headers["Content-type"] ||= "text/html; charset=utf8"
    end
end

to rubyonrails encoding by iwanttodeletemyaccount on Jun 29, 2006 1 Comments

Typo dispatch.fcgi

#!/usr/local/bin/ruby
#
# You may specify the path to the FastCGI crash log (a log of unhandled
# exceptions which forced the FastCGI instance to exit, great for debugging)
# and the number of requests to process before running garbage collection.
#
# By default, the FastCGI crash log is RAILS_ROOT/log/fastcgi.crash.log
# and the GC period is nil (turned off).  A reasonable number of requests
# could range from 10-100 depending on the memory footprint of your app.
#
# Example:
#   # Default log path, normal GC behavior.
#   RailsFCGIHandler.process!
#
#   # Default log path, 50 requests between GC.
#   RailsFCGIHandler.process! nil, 50
#
#   # Custom log path, normal GC behavior.
#   RailsFCGIHandler.process! '/var/log/myapp_fcgi_crash.log'
#
require File.dirname(__FILE__) + "/../config/environment"
require 'fcgi_handler'

RailsFCGIHandler.process!

to rubyonrails by krsgoss on Feb 20, 2006

link_to_remote not calling "complete"

<ul>
<% @items.each do |item| %>
>
<%= link_to_remote(item.name, 
{       
:url => { 
:controller => 'security', 
:action => 'add_security', 
:description => item.name, 
:symbol => item.symbol
},
:update     => {:success=>'indexFundList', :failure=>'notice'},
:position   => :bottom,
:loading    => "loading()",
:complete   => "completeAddIndexFund(request)"
})           -%>
>
<% end %>
>

to rubyonrails by tikki on Jan 30, 2006 2 Comments

Import of old Instiki data to a new Instiki instance

Trying to import data from Instiki.app 10.2 to Instiki 11.0 (alpha). The follow error is occurring.

 % ./instiki/script/import_storage -t instiki-old/2500 -i instiki-old/rb_src -d mysql -o instiki-data.sql
/users/home/quidire/web/public/instiki-old/rb_src/app/models/chunks/engines.rb:3:in `require': No such file to load -- redcloth (LoadError)
        from /users/home/quidire/web/public/instiki-old/rb_src/app/models/chunks/engines.rb:3
        from /users/home/quidire/web/public/instiki-old/rb_src/app/models/wiki_content.rb:2:in `require'
        from /users/home/quidire/web/public/instiki-old/rb_src/app/models/wiki_content.rb:2
        from /users/home/quidire/web/public/instiki-old/rb_src/app/models/revision.rb:2:in `require'
        from /users/home/quidire/web/public/instiki-old/rb_src/app/models/revision.rb:2
        from /users/home/quidire/web/public/instiki-old/rb_src/app/models/page.rb:3:in `require'
        from /users/home/quidire/web/public/instiki-old/rb_src/app/models/page.rb:3
        from /users/home/quidire/web/public/instiki-old/rb_src/app/models/web.rb:2:in `require'
        from /users/home/quidire/web/public/instiki-old/rb_src/app/models/web.rb:2
        from /users/home/quidire/web/public/instiki-old/rb_src/app/models/wiki_service.rb:7:in `require'
        from /users/home/quidire/web/public/instiki-old/rb_src/app/models/wiki_service.rb:7
        from ./instiki/script/import_storage:96:in `require'
        from ./instiki/script/import_storage:96

to rubyonrails by quidire on Nov 18, 2005 1 Comments

Select a State in Rails

<%= select(:shipaddress, :state, [   
        ['Select a State', 'None'],
        ['Alabama', 'AL'], 
        ['Alaska', 'AK'],
        ['Arizona', 'AZ'],
        ['Arkansas', 'AR'], 
        ['California', 'CA'], 
        ['Colorado', 'CO'], 
        ['Connecticut', 'CT'], 
        ['Delaware', 'DE'], 
        ['District Of Columbia', 'DC'], 
        ['Florida', 'FL'],
        ['Georgia', 'GA'],
        ['Hawaii', 'HI'], 
        ['Idaho', 'ID'], 
        ['Illinois', 'IL'], 
        ['Indiana', 'IN'], 
        ['Iowa', 'IA'], 
        ['Kansas', 'KS'], 
        ['Kentucky', 'KY'], 
        ['Louisiana', 'LA'], 
        ['Maine', 'ME'], 
        ['Maryland', 'MD'], 
        ['Massachusetts', 'MA'], 
        ['Michigan', 'MI'], 
        ['Minnesota', 'MN'],
        ['Mississippi', 'MS'], 
        ['Missouri', 'MO'], 
        ['Montana', 'MT'], 
        ['Nebraska', 'NE'], 
        ['Nevada', 'NV'], 
        ['New Hampshire', 'NH'], 
        ['New Jersey', 'NJ'], 
        ['New Mexico', 'NM'], 
        ['New York', 'NY'], 
        ['North Carolina', 'NC'], 
        ['North Dakota', 'ND'], 
        ['Ohio', 'OH'], 
        ['Oklahoma', 'OK'], 
        ['Oregon', 'OR'], 
        ['Pennsylvania', 'PA'], 
        ['Rhode Island', 'RI'], 
        ['South Carolina', 'SC'], 
        ['South Dakota', 'SD'], 
        ['Tennessee', 'TN'], 
        ['Texas', 'TX'], 
        ['Utah', 'UT'], 
        ['Vermont', 'VT'], 
        ['Virginia', 'VA'], 
        ['Washington', 'WA'], 
        ['West Virginia', 'WV'], 
        ['Wisconsin', 'WI'], 
        ['Wyoming', 'WY']]) %>

to rubyonrails by miraclebaby on Oct 14, 2005

start my lighttpd-based rails app

/usr/local/sbin/lighttpd -f /home/avshop/lighttpd/lighttpd.conf

to lighttpd rubyonrails by miraclebaby on Oct 05, 2005

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