mabenson00

# Basic key operators to query the JSON objects :

# #> : Get the JSON object at that path (if you need to do something fancy)
# -> : Get the JSON object at that path (if you don't)
# ->> : Get the JSON object at that path as text
# {obj, n} : Get the nth item in that object

# https://www.postgresql.org/docs/9.4/functions-json.html#FUNCTIONS-JSONB-OP-TABLE
# Date 
# date before today

peterc

SELECT
  schema_name, rel_name, table_size,
  pg_size_pretty(table_size) AS size
FROM (
  SELECT
    nspname AS schema_name,
    relname AS rel_name,
    pg_table_size(pg_class.oid) AS table_size
  FROM pg_class, pg_namespace
  WHERE pg_class.relnamespace = pg_namespace.oid

maxivak

Integrate Gem/Engine and main Rails app

Overview

• Paths
• Routes
• Add functionality to controller
• Improving (Extending or overriding) Engine functionality
• Helpers
• Assets

krasnoukhov

My largest Sidekiq application had a memory leak and I was able to find and fix it in just few hours spent on analyzing Ruby's heap. In this post I'll show my profiling setup.

As you might know Ruby 2.1 introduced a few great changes to ObjectSpace, so now it's much easier to find a line of code that is allocating too many objects. Here is great post explaining how it's working.

I was too lazy to set up some seeding and run it locally, so I checked that test suite passes when profiling is enabled and pushed debugging to production. Production environment also suited me better since my jobs data can't be fully random generated.

So, in order to profile your worker, add this to your Sidekiq configuration:

if ENV["PROFILE"]

jaimeiniesta

The following is a list of places where you can find job offers as a Rails developer:

https://twitter.com/currofile
https://twitter.com/domestikaempleo #spain only

http://www.workingwithrails.com/
https://weworkremotely.com/jobs/search?term=rails
https://jobs.github.com/
http://trabajosrails.com/ # spain only
http://www.indeed.com/q-Ruby-On-Rails-Developer-jobs.html

eLafo

#!/bin/bash
echo "Creating tags"
for tag in `git branch -r | grep "tags/" | egrep -vw "svn/tags/(integration|production)" | sed 's/ tags\///'`; do
  git_tag_name=`echo "$tag" | sed 's/tags\///'`
  parents=`git show --format="%P" refs/remotes/$tag`
  real_parent=`echo "$parents" | cut -d' ' -f 2`

  git tag -a -m"Converting SVN tags" $git_tag_name $real_parent
done

maxim

In Rails 3

NOTE: This post now lives (and kept up to date) on my blog: http://hakunin.com/rails3-load-paths

If you add a dir directly under app/

Do nothing. All files in this dir are eager loaded in production and lazy loaded in development by default.

If you add a dir under app/something/

jpetazzo

# this forces dpkg not to call sync() after package extraction and speeds up install
RUN echo "force-unsafe-io" > /etc/dpkg/dpkg.cfg.d/02apt-speedup
# we don't need and apt cache in a container
RUN echo "Acquire::http {No-Cache=True;};" > /etc/apt/apt.conf.d/no-cache

pboling

source 'https://rubygems.org'
# Follows the bundler group pattern described here:
#   http://iain.nl/getting-the-most-out-of-bundler-groups

# Gemfile.mine in root dir allows locally custom gems.
# NOTE: Doing this will change the Gemfile.lock - commit with care.
eval File.read(File.join(File.dirname(__FILE__), 'Gemfile.mine')) if File.exists? File.join(File.dirname(__FILE__), 'Gemfile.mine')

ruby '1.9.3'

cpuguy83

module CacheHelper
  extend ActiveSupport::Concern
  
  included do
    extend Cacher
    include Cacher
    cattr_accessor :updated_column_name
    self.updated_column_name ||= :change_time
    cattr_accessor :file_location
    cattr_accessor :file_digest