Event Sourcing - Command

command.ex

defmodule Command.RegisterUser do
  # Documentation and Typespec removed for brevity
  use Ecto.Schema
  import Ecto.Changeset

  @primary_key false
  embedded_schema do
    field(:first_name)
    field(:last_name)
    field(:email)
    field(:password)
  end

  def changeset(record, params \\ %{}) do
    record
    |> cast(params, __schema__(:fields))
    |> validate_required(__schema__(:fields))
    |> validate_format(:email, ~r/([\w.]+)@{1}([\w.]+)/)
    |> validate_length(:password, min: 6)
  end
end