sundbp

# Buidling blocks to support injectionless DCI
require 'rubygems'
require 'active_support/core_ext/string/inflections'
#require 'pry'

module ContextAccessor
  def context
    Thread.current[:context]
  end
end

towry

require_relative "customer"
require_relative "user"

# context bind role to object.
# by using the extend method in ruby.
# now the data object has some behaviors that get from the role class(Customer).
class Context
  def initialize(user, book)
    @customer, @book = user, book
    @customer.extend(Customer)

marksim

I'm not sure how to remove the dependency on VerificationMailer without pushing it into the profile model and making the model suddenly care about how to mail verifications.

I WANT to remove it so I don't have any need to load up rails when running the tests, but also want to keep my models sensible and without a lot of knowledge of business logic.

Example usage:

profile = Profile.find(1)
profile.extend Verifier

profile.verify(email: 'myemail@example.com')

fj

# In a context somewhere, we'd like to do this:
u = User.new
u.extend Passworded

# Unfortunately, this doesn't work:

module Passworded
  include ActiveModel::Model     # Can't do this because ActiveModel::Model wants to be included
                                 # on classes, not modules.

rapimo

SELECT hstore(array_agg(v), array_agg(c::text)) FROM (
SELECT v, COUNT(*) as c ,1 as agg from  unnest(ARRAY['foo','bar','baz','foo']) v GROUP BY v) t
GROUP BY agg

--> "bar"=>"1", "baz"=>"1", "foo"=>"2"

ludyna

# DCI EXAMPLE IN RUBY (with some prototype elements)
# Blog post: https://www.ludyna.com/oleh/dci-example-in-ruby
# 
# More info: 
#
#   Creator of MVC & DCI, Trygve Reenskaug: DCI: Re-thinking the foundations of 
#   object orientation and of programming
#   http://vimeo.com/8235394
#
#   James Coplien: Why DCI is the Right Architecture for Right Now

jasoncodes

class CreateItemChildrenCountView < ActiveRecord::Migration
  def self.up
    execute <<-SQL
      CREATE VIEW item_children_count AS
      SELECT parent_id AS item_id, COUNT(*) as children_count
      FROM items GROUP BY parent_id;
    SQL
  end

  def self.down

jodosha

1. Setup

rails new blog
cd blog
hanami new bookshelf
vim Gemfile # add `hanami`
bundle
vim bookshelf/config/environment.rb # See Note 1

jcypret

gem "phonelib"

olivierlacan

This guide assumes that you recently run brew upgrade postgresql and discovered to your dismay that you accidentally bumped from one major version to another: say 9.3.x to 9.4.x. Yes, that is a major version bump in PG land.

First let's check something.

brew info postgresql

The top of what gets printed as a result is the most important: