neilmiddleton

create table johns_problem as 
select distinct trim(name) as name
from drugs
where customer_id IS NOT NULL
order by name;

select distinct name from drugs

-- delete table johns_problem

neilmiddleton

ActionView::Template::Error (Can't mass-assign protected attributes: locale):
    1: <div id='recent_activity'>
    2:   <h2><%= t('.latest_activity') %></h2>
    3:   <% if (activity = @recent_activity.collect { |a|
    4:           activity_message_for(a)
    5:         }.reject(&:blank?)).present? %>
    6:     <ul class='clickable'>
    7:     <% activity.each do |message| %>
  activemodel (3.2.8) lib/active_model/mass_assignment_security/sanitizer.rb:48:in `process_removed_attributes'
  activemodel (3.2.8) lib/active_model/mass_assignment_security/sanitizer.rb:20:in `debug_protected_attribute_removal'

neilmiddleton

unless MyModel::Translation.column_names.map(&:to_sym).include?(:new_attrib)
  add_column MyModel::Translation.table_name, :new_attrib, :string
end

neilmiddleton

class ContactsController < ApplicationController

  def create
    @contact = Contact.new(params[:contact])
    if @contact.valid?
      ContactMailManager.delay.send_contact_mail(@contact)
      redirect_to contact_path(1), :notice => t("contact.sent")
    else
      ...
    end

neilmiddleton

require 'uri'                                                                         

if ENV.has_key? "BUCKET_URL"                                                          
  uri = URI.parse(ENV["BUCKET_URL"])                                                  
  ENV["S3_ACCESS_KEY"] = uri.user                                                     
  ENV["S3_ACCESS_SECRET"] = uri.password                                              
end 

neilmiddleton

## Rails Upgrade check
#
# Check your github repos for out of date rails apps
#
# usage: $ ENV=yourusername PASSWORD=yourpassword ruby railscheck.rb
# or
# usage: $ ENV=yourusername PASSWORD=yourpassword ORG=yourorgname ruby railscheck.rb
#
# n.b requires the octokit gem

neilmiddleton

Writing is hard, so do it.
==========================

Over the last few months I've been working on something that I wouldn't have seen myself doing at any point in my life, and that's the task of writing a book.  I'm not talking about a 'Janet & John' novel, or some sort of 'Fifty Shades of Grey' sort of affair, but a proper printed dead tree, trip over it, technical book.

It all started back in May/June time when I was approached by a good friend at [Heroku](http://www.heroku.com), who had been approached in turn by [O'Reilly](http://www.oreilly.com), to produce a book about the platform and some rough ideas for what sort of book might be relevant and saleable.  At the end of a fairly lengthy process it ended up that I was the author, had a contract in my hand and a schedule to try and stick to.

Cripes

## Getting started

neilmiddleton

class Array
  def foo
    puts self
  end
end

class Bar < ActiveRecord::Base
  ...blah
end

neilmiddleton

LOG:  could not bind IPv4 socket: Can't assign requested address
HINT:  Is another postmaster already running on port 5432? If not, wait a few seconds and retry.
WARNING:  could not create listen socket for "localhost"
FATAL:  could not create any TCP/IP sockets

neilmiddleton

$ ~/ nslookup 
> server 8.8.8.8
Default server: 8.8.8.8
Address: 8.8.8.8#53
> o localhost
Server:  	8.8.8.8
Address:	8.8.8.8#53

Non-authoritative answer:
Name:	o.dev.kyanmedia.net