martijnvg

curl -s -XPUT 'localhost:9200/test1' -d '{
    "mappings" : {
        "records" : {
            "properties" : {
                "coords" : {
                    "type" : "nested",
                    "properties" : {
                    }
                }
            }

jbgo

This is how I debug SystemStackError when there is no stack trace.

My first attempt was:

begin
  a_method_that_causes_infinite_recursion_in_a_not_obvious_way
rescue SystemStackError
  puts caller
end

jnicklas

Capybara.add_selector :record do
  xpath { |record| XPath.css("#" + ActionController::RecordIdentifier.dom_id(record)) }
  match { |record| record.is_a?(ActiveRecord::Base) }
end

steveklabnik

#!/usr/bin/env ruby

def usage
  puts "./pair [name]: pair two people"
  puts "./pair       : switch to just steve"
  exit
end

def set_config(name, email)
  `git config user.name "#{name}"`

clintongormley

Yesterday I upgraded our running elasticsearch cluster on a site which serves a few million search requests a day, with zero downtime. I've been asked to describe the process, hence this blogpost.

To make it more complicated, the cluster was running elasticsearch version 0.17.8 (released 6 Oct 2011) and I upgraded it to the latest 0.19.10. There have been 21 releases between those two versions, with a lot of functional changes, so I needed to be ready to roll back if necessary.

Our setup:

• elasticsearch

We run elasticsearch on two biggish boxes: 16 cores plus 32GB of RAM. All indices have 1 replica, so all data is stored on both boxes (about 45GB of data). The primary data for our main indices is also stored in our database. We have a few other indices whose data is stored only in elasticsearch, but are updated once daily only. Finally, we store our sessions in elasticsearch, but active sessions are cached in memcached.

joho

Steps to install and run PostgreSQL 9.2 using Homebrew (Mac OS X)
(if you aren't using version 9.1.5, change line 6 with the correct version)

1. launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist
2. mv /usr/local/var/postgres /usr/local/var/postgres91
3. brew update
4. brew upgrade postgresql
5. initdb /usr/local/var/postgres -E utf8
6. pg_upgrade -b /usr/local/Cellar/postgresql/9.1.5/bin -B /usr/local/Cellar/postgresql/9.2.0/bin -d /usr/local/var/postgres91 -D /usr/local/var/postgres
7. cp /usr/local/Cellar/postgresql/9.2.0/homebrew.mxcl.postgresql.plist ~/Library/LaunchAgents/

karmi

.DS_Store
tmp/

ferblape

1. Alfredos
2. Madcafé
3. New York Burger
4. Homeburger
5. San Wich
6. La vaca picada

 _____ 

greypants

UPDATE: It's a gem!

This helper has finally been moved into a gem called nav_lynx!

https://github.com/vigetlabs/nav_lynx

http://rubygems.org/gems/nav_lynx

Thanks to @brianjlandau and @reagent for getting that set up and tested!

Behold, the nav_link:

karmi

# An example of elasticsearch & Tire setup for ActiveRecord associations.
#
# A `Book has_many :chapters` scenario, with mapping and JSON serialization
# for indexing associated models.
#
# Demonstrates three important caveats as of now:
#
# 1. You you have to use `touch: true` in the `belongs_to` declaration,
#    to automatically notify the parent model about the update.
#