Rails 8: Cannot change default currency

[SylarRuby]

In the latest rails 8.0, I could not seem to change the default currency from usd to gbp.

Things I've tried:

# initializers/money.rb

MoneyRails.configure do |config|
  config.default_currency = :gbp
  # config.default_currency = -> { :gbp }
end

Have also tried, in model:

# Meal.rb

register_currency :gbp # does nothing

# with_currency does nothing
monetize :price_cents, with_currency: :gbp

In rails console

Meal.last.price.currency.name #= "United States Dollar"

A workaround was to use a callback in the model:

[...]

after_initialize do |meal|
    self.price_currency = Money::Currency.new(:gbp)
   # If we kept register_currency :gbp, we could do:
   # self.price_currency = Meal.currency
end

Nothing actually works as per documentation. Has this issue been addressed, but not reflect on the documentation?

Thanks

[paddy-hack]

I suspect the migration that adds your Meal record to the database schema is using "USD". This can happen if you set the default currency after creating and running the migration.

Running bin/rails console with your initializer/money.rb on Rails 8.0.2 (Ruby 3.4.4), I get

test(dev)> Money.default_currency.id
=> :gbp
meal = Meal.new(price: 5)
=> 
#<Meal:0x00007f8fbf400780
...
test(dev)> meal.price.currency.name
=> "British Pound"

For completeness' sake, app/model/meal.rb has

class Meal < ApplicationRecord
  monetize :price_cents
end

and the migration looks like

class CreateMeals < ActiveRecord::Migration[8.0]
  def change
    create_table :meals do |t|
      t.monetize :price

      t.timestamps
    end
  end
end

which yields the following in db/schema.rb after bin/rails db:migrate

ActiveRecord::Schema[8.0].define(version: 2025_05_25_122540) do
  create_table "meals", force: :cascade do |t|
    t.integer "price_cents", default: 0, null: false
    t.string "price_currency", default: "GBP", null: false
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  end
end