elixir-multi-transaction.ex

defmodule MyApp.Registration do
  @moduledoc """
  The Registration context.
  """
  alias Ecto.Multi
  alias MyApp.Repo
  alias MyApp.Subdomain.Accounts
  alias MyApp.Orgs
  alias MyApp.Accounts.User
  alias MyApp.Orgs.Org

  def create(params) do
    multi = Multi.new()
    |> Multi.insert(:org, Org.registration_changeset(%Org{}, params))
    |> Multi.run(:user, fn _repo, %{org: org} ->

      multi = Multi.new()
      |> Multi.insert(:user, User.registration_changeset(%User{}, params))
      |> IO.inspect
      
      Repo.transaction(multi)
      |> case do
        {:ok, %{user: user}} -> {:ok, user}
        {:error, :user, %Ecto.Changeset{} = changeset, _changes} -> {:error, changeset}
      end
      |> IO.inspect
    end)

    Repo.transaction(multi)
    |> case do
      {:ok, user} -> {:ok, user}
      {:error, :org, %Ecto.Changeset{} = changeset, _changes} -> {:error, changeset}
      {:error, :user, %Ecto.Changeset{} = changeset, _changes} -> {:error, changeset}
    end

  end

end