I am trying to do the following,
defmodule Command do
defmacro __using__(opts \\ [], do: block) do
unless Keyword.has_key?(opts, :aggregate_identifier) do
raise ArgumentError, "Missing :aggregate_identifier key"
end
aggregate_identifier = Keyword.fetch!(opts, :aggregate_identifier)
quote do
use Ecto.Schema
@primary_key { @aggregate_identifier_key, :binary_id, autogenerate:
true }
@derive Jason.Encoder
embedded_schema unquote(block)
end
end
end
Just so I can do something like,
defmodule CreateRecurringTransfer do
use Command, [aggregate_identifier: :id] do
field(:dtstart, :naive_datetime)
field(:dtend, :naive_datetime)
embeds_one(:amount, PositiveAmount)
embeds_one(:rrule, Rrule)
embeds_one(:owned_by, CustomerIdentity)
embeds_one(:from_account, TransferAccount)
embeds_one(:to_account, TransferAccount)
end
end
But I get `** (CompileError) iex:3: undefined function use/3` which I
assume what I am trying to do is not supported.
I am curious to understand why it doesn't work (beside maybe not being
supported), and what would be the problem by trying to support it
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