Dzen

To start your Phoenix server:

• Install dependencies with mix deps.get
• Start Postgres, e.g. via docker-compose up -d
• Start Phoenix endpoint with mix phx.server or inside IEx with iex -S mix phx.server

Now you can visit localhost:4000 from your browser.

Ready to run in production? Please check our deployment guides.

Deployed

Deployed to Gigalixir → https://red-dark-honeyeater.gigalixirapp.com

Log

• Latest Elixir & Erlang installed
• Gigalixir Docs
• installed latest phoenix
  • mix local.hex
  • mix archive.install hex phx_new
• created the app mix phx.new --no-ecto d-zen --app dzen
• fetched the dependencies mix deps.get
• local live-reloadable start: mix phx.server
• registered & then logged into gigalixir: gigalixir login
• created the app: APP_NAME=$(gigalixir create)
  • if not automatically set, gigalixir git:remote $APP_NAME
• configured the versions
  • echo "elixir_version=1.13.3" > elixir_buildpack.config
  • echo "erlang_version=23.3.2" >> elixir_buildpack.config
  • echo "node_version=14.15.4" > phoenix_static_buildpack.config
• deploy to gigalixir: git push gigalixir master
• visit https://red-dark-honeyeater.gigalixirapp.com
  • wait for the load balancer start or restart the app in https://console.gigalixir.com
• added an Ecto Repo
  • mix ecto.create after all the required code changes
  • mix ecto.gen.migration create_counters to initialize the counters
• created the free gigalixir DB tier: gigalixir pg:create --free

Changes

• cleanup: c1c3ba41d99179a169868d4161a8067cd0d1656a
• begin with a live view: 0292d822379f6079fd2f07ed91e26a43cb55c5fc
• making websocket connections work on gigalixir: 66678ad5fc4f53e2e90bce790ecb1933f256b40d
• PubSub & LiveView b685c71233b9e200e9eb8a2dcb79b73e70c6b53e + channel name fix 314b8191fb5e993038c3506bbbb89c87f9df1aa0
• refactoring to not repeat the channel name mismatch mistake ecd14f02bf71bb33c330b6abfe680580560e126f
• added ecto to persist the counters: diff before-ecto...master

Learn more

• Official website: https://www.phoenixframework.org/
• Guides: https://hexdocs.pm/phoenix/overview.html
• Docs: https://hexdocs.pm/phoenix
• Forum: https://elixirforum.com/c/phoenix-forum
• Source: https://github.com/phoenixframework/phoenix

Gigalixir Hands-On

IEx in the Container

docs

• gigalixir account:ssh_keys:add "$(cat ~/.ssh/id_rsa.pub)" and wait a couple of minutes
• gigalixir ps:remote_console

Resetting the DB

docs

# check the data
Dzen.Repo.all(Dzen.Counter)
# drop
Application.app_dir(:dzen, "priv/repo/migrations"), :down, [all: true])
# create
Ecto.Migrator.run(Dzen.Repo, Application.app_dir(:dzen, "priv/repo/migrations"), :up, [all: true])

Changing an Entity

# check the data
Dzen.Repo.all(Dzen.Counter)
# change the entity
Dzen.Repo.get_by(Dzen.Counter, id: 2)
|> Ecto.Changeset.change(%{value: 42})
|> Dzen.Repo.update()