algas

NAMES = foo bar baz

hello: $(addprefix hello-, $(NAMES))

hello-%:
	@echo "hello ${@:hello-%=%}"

world: $(addprefix world-, $(NAMES))

world-%:

ftes

-# layouts/_error_messages.html.haml

- if f.object.errors.any?
  .notification.is-danger Please review the problems below:
- if f.object.errors[:base].present?
  .notification.is-danger= f.object.errors[:base].join(', ')

mohanpedala

Table of Contents

• set -e, -u, -x, -o pipefail
• set -e
• set -x
• set -u
• set -o pipefail
• Setting IFS
• Original Reference

set -e, -u, -x, -o pipefail

ygotthilf

ssh-keygen -t rsa -b 4096 -m PEM -f jwtRS256.key
# Don't add passphrase
openssl rsa -in jwtRS256.key -pubout -outform PEM -out jwtRS256.key.pub
cat jwtRS256.key
cat jwtRS256.key.pub

chrismcg

defmodule Phlink.Form do
  use Ecto.Schema
  import Ecto.Changeset

  @primary_key false
  schema "non_db_form.user" do
    field :name, :string
    field :thing, :string
  end
  @required_fields ~w(name)

darrenboyd

OBSOLETE

THIS INFORMATION IS NOW OUT OF DATE, AND EXISTS HERE ONLY FOR ARCHIVAL PURPOSES

TROUBLESHOOTING

Excon Error

You may suffer an error that looks like this. It's possible you are setting up a new Mac, or you just recompiled your Ruby.

teamon

module PostRepresenter
  include Representer
  using Representer
  
  def basic(post)
    select(post, :id, :name)
  end
  
  def details(post)
    basic(post) & comments(post)

stereoscott

# if you want to monkey patch every controller, put this in initializers/active_admin.rb
ActiveAdmin::ResourceController.class_eval do
  include ActiveAdmin::CSVStream
end

scy

Opening and closing an SSH tunnel in a shell script the smart way

I recently had the following problem:

• From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
• That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.

We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like

ssh -L 3306:localhost:3306 remotehost

bigfive

module ActiveAdminHelper

  def admin_arbre_context
    @admin_arbre_context ||= Arbre::Context.new(assigns, self)
  end

  def default_renderer
    case controller.send(:resource_class).name
    when "ActiveAdmin::Page"
      "page"