ash_money/documentation/tutorials/get-started-with-ash-money.md

Getting Started With AshMoney

The primary thing that AshMoney provides is AshMoney.Types.Money. This is backed by ex_money. You can use it out of the box like so:

attribute :balance, AshMoney.Types.Money

Or you can add it to your compile time list of types for easier reference:

config :ash, :custom_types, money: AshMoney.Types.Money

Then compile ash again, mix deps.compile ash --force, and refer to it like so:

attribute :balance, :money

AshPostgres Support

Thanks to ex_money_sql, there are excellent tools for lowering support for money into your postgres database. This allows for things like aggregates that sum amounts, and referencing money in expressions:

sum :sum_of_usd_balances, :accounts, :balance do
  filter expr(fragment("(?).currency_code", balance).currency_code == "USD")
end

To install it, add AshMoney.AshPostgresExtension to your list of installed_extensions in your repo, and generate migrations.

defmodule YourRepo do
  def installed_extensions do
    [..., AshMoney.AshPostgresExtension]
  end
end

AshGraphql Support

Add the following to your schema file:

  object :money do
    field(:amount, non_null(:decimal))
    field(:currency, non_null(:string))
  end