rlivsey

defmodule MyApp.TestChannel do
  use MyApp.Web, :channel

  require Logger
  
  intercept ["some-event"]

  def join("test:lobby", _, socket) do
    # subscribe to a topic
    subscribe socket, "some-topic"

bnorton

class ApplicationController < ActionController::Base
  before_action :skip_session

  private

  def skip_session
    request.session_options[:skip] = true
  end
end

plamb

Streaming json from Postgresql through Phoenix

I wanted to explore the fastest way to have json generated in postgresql delivered through phoenix to the browser. With this, I wanted to completely avoid any decoding/encoding happening in ecto/phoenix since I already had perfectly valid json coming out of pg.

It took some trial and error, and some source code reading, and some help from the list but I've got it working with materialized views and returning them in less than 1ms on my laptop.

Here's the short how-to. I'm using pg 9.4 and this should work with both json and jsonb results. I've also used the generic app/App nomenclature, you'll need to change that to your app's name.

Let's take a really, really simple query that returns some json:

kesor

# unicorn

description "unicorn ruby app server"

start on (local-filesystems and net-device-up IFACE=lo and runlevel [2345])
stop on runlevel [!2345]

env WORKDIR=/data
env PIDFILE=/data/tmp/pids/unicorn.pid
env CFGFILE=/data/config/unicorn.rb

atenni

Problem: When linking to the raw version of a gist, the link changes with each revision.

Solution:

To return the first file from a gist: https://gist.github.com/[gist_user]/[gist_id]/raw/

• Example: https://gist.github.com/atenni/5604522/raw/
• Works even when you change the filename.

To get a file from multi–file gist: https://gist.github.com/[gist_user]/[gist_id]/raw/[file_name]

quiver

Pub/Sub pattern with PostgreSQL's LISTEN/NOTIFY command

This is a simple chat-like program using pub-sub pattern, backed by PostgreSQL's LISTEN/NOTIFY command.

Publish

publish message to foo channel from user nickname.

$ python pub.py foo nickname
PUBLISH to channel #foo

rgreenjr

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

leshill

class SomeConcern
  constructor: (klass) ->
    _.extend klass.prototype,
      doesAllTheThings: ->
        true

jeffreyiacono

require 'rubygems'
require 'bundler'

Bundler.require
require './application'

namespace :assets do
  desc 'compile assets'
  task :compile => [:compile_js, :compile_css] do
  end