Ben Smith slashdotdash

Phoenix 1.4.x to 1.5.0 upgrade instructions

Phoenix 1.5 requires Elixir >= 1.7. Be sure your existing version is up to date by running elixir -v on the command line.

Install the new phx.new project generator

$ mix archive.uninstall phx_new
$ mix archive.install hex phx_new 1.5.0

James Edward Gray II

Quote from Elixir Mix 63 - "063: Designing Elixir Systems With OTP with Bruce Tate and James Gray", starting at 01:03:13

"I've worked at a bunch of companies building web apps for a long time, and I keep seeing this same pattern, and it haunts me. In the web world, all we want is these long interactions with people, and we live in this stateless world. So what we do is, the first part of every request, we do thirty queries to re-establish the state of the world that we just forgot a few seconds ago after the last request. And then we go forward and make one tiny step forward, and then we forget everything again, so that when the next request comes in we can do thirty queries to put it all back and make one more tiny step. And I kept thinking, "there has to be a better way than this, right?"

And if you look at web advancements over the years, most of the things we're doing are

	defmodule SimpleS3Upload do
	@moduledoc """
	Dependency-free S3 Form Upload using HTTP POST sigv4
	https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-post-example.html
	"""

	@doc """
	Signs a form upload.
	The configuration is a map which must contain the following keys:
	* `:region` - The AWS region, such as "us-east-1"

	defmodule Cmd.Command do
	@moduledoc """
	Utility for command definition, wrapping a design pattern into code

	For our commands we will used type_embedded_schema to design an in memory schema
	which will be used for the command payload

	As well as this we require the developer to implement a changeset/2 function

	"""

	defmodule Mix.Tasks.InspectAggregate do
	use Mix.Task

	alias MyApp.EventStore

	def run(args) do
	Application.ensure_all_started(:eventstore)
	_ = EventStore.start_link()

	{opts, _} =

	defmodule EventStore.CategoryStreamLinker do
	@moduledoc """
	Links streams from aggregate instances to their respective category streams.

	example: events from stream_uuid of `contractors_contract-07c52787-da0c-444f-9783-5d380f7093f9` will be
	linked to stream_uuid of `contractors_contract`.
	"""

	use Commanded.Event.Handler,
	application: My.App,

	# The helper functions for the test module. To make it possible to import
	# this helper module in the test module, define this module outside the context that uses it.
	defmodule MyTest.Helpers do
	@spec fake_params(Enumrable.t()) :: map
	def fake_params(override \\ %{}) do
	%{
	country: "jp",
	phone_number: Faker.phone_number(),
	locale: "ja",
	company: "My Company",

	defmodule MyApp.AggregateCase do
	@moduledoc """
	This module defines the test case to be used by aggregate tests.
	"""

	use ExUnit.CaseTemplate

	using aggregate: aggregate do
	quote bind_quoted: [aggregate: aggregate] do
	@aggregate_module aggregate

	name: Elixir CI

	on: push

	jobs:
	build:

	runs-on: ubuntu-latest

	container: