jacobparry / elixirplayground

A sandbox for learning Elixir and its environment

ElixirPlayground

A sandbox for learning Elixir and its environment

• Install Elixir, node, postgres
• mix archive.install https://github.com/phoenixframework/archives/raw/master/phx_new.ez

Step 1 - Create an Umbrella Application

1. mix new elixir_playground_umbrella --umbrella

• Similar to .NET Solution
• Used for delineating logic or separating distict services

Step 2 - Create Data Logic Application

1. mix new elvenhearth --sup

• A --sup option can be given to generate an OTP application skeleton including a supervision tree. Normally an app is generated without a supervisor and without the app callback.

Step 3 - Create Phoenix Web Application

1. mix phx.new elvenhearth_phx --no-ecto

• The --no-ecto tells phoenix not to include the ecto wrapper or any of the files needed to interact with ecto.

Step 4 - Add Ecto and Postgres

• Add the ecto and postrex dependecies from hex.pm to logic app.
• Add config blocks in config.exs
• Add the repo file. ** use Ecto.Repo, otp_app: :elvenhearth
• Add postgrex and ect0 to elvenhearth mix.exs applications
• Add child worker for the repo. ** worker(Elvenhearth.Repo, [])
• run mix ecto ** mix ecto.create
• Open database (psql -d ), \dt

Step 4 - Create Ecto Models

• Model

• Create User model ** use Ecto.schema ** schema "users" do

• Create user migration

• mix ecto.gen.migration add_users_table from logic app

• Run migration

• Migration table in psql

• Make some queries

• Run them in iex. iex -S mix

• Changesets

• Seeds

Step 5 - Absinthe Boilerplate

• Add the dependencies to the web application {:absinthe, "> 1.4"}, {:absinthe_plug, "> 1.4"}, {:absinthe_phoenix, "> 1.4"}, {:absinthe_relay, "> 1.4"},

• Add supervisor to Web Application supervisor(Absinthe.Subscription, [ElvenhearthPhxWeb.Endpoint])

• Add reference to user_socket use Absinthe.Phoenix.Socket, schema: ElvenhearthPhxWeb.Schema

• Add route in the router.ex scope "/" do pipe_through :api

   forward("/graphiql", Absinthe.Plug.GraphiQL,
     schema: ElvenhearthPhxWeb.Schema,
     interface: :playground
   )
  

  end

• Create a schema.ex file (in web app)

• List of users user object in schema list of users list_user_method not null fields

Step 6 - Resolvers

• Create User and Character Resolvers ** Talk about the /3 arity (first field is root object)
• Abstract the objects and fields