class Product < ApplicationRecord
  money_attribute :price, currency: 'USD'   # fixed currency, single column
  money_attribute :total                    # multi-currency, two columns
end

Product.new(price: 12).price  # => [USD 12.00]

# app/models/product.rb
class Product < ApplicationRecord
  money_attribute :price, currency: 'USD'
end

# Gemfile
gem 'minting-rails'

Currency.register(code: 'CRC', subunit: 2, symbol: '₡')
Currency.register(code: 'NGN', subunit: 3, symbol: '₦')

Mint.money(1234.56, 'USD').to_s  # => "$1,234.56"

I18n.locale = :'pt-BR'
Mint.money(1234.56, 'USD').to_s  # => "$1.234,56"

Mint.money(1234.56, 'USD').to_s  # => "$1,234.56"
Mint.money(-1234.56, 'USD').to_s # => "($1,234.56)"
Mint.money(0, 'USD').to_s        # => "--"

class CreateProducts < ActiveRecord::Migration[7.1]
  def change
    create_table :products do |t|
      t.decimal :price
      t.decimal :discount
      t.timestamps
    end
  end
end

class Product < ApplicationRecord
  money_attribute :price, currency: 'USD'
  money_attribute :discount, currency: 'USD'
end

product = Product.new(price: 12, discount: '3.50')
product.price    # => [USD 12.00]
product.discount # => [USD 3.50]

Product.new(price: 12.to_money('EUR'))
# => ArgumentError: ... has different currency. Only USD allowed.

class CreateOffers < ActiveRecord::Migration[7.1]
  def change
    create_table :offers do |t|
      t.decimal :price_amount
      t.string  :price_currency
      t.timestamps
    end
  end
end

class Offer < ApplicationRecord
  money_attribute :price
end

offer = Offer.new(price: 15.to_money('EUR'))
offer.price          # => [EUR 15.00]
offer.price_amount   # => 15.0
offer.price_currency # => "EUR"

class Offer < ApplicationRecord
  money_attribute :price, currency: 'USD'
end

offer = Offer.new(price: '12')
offer.price.currency.code # => "USD"

# Migration
create_table :orders do |t|
  t.bigint  :total_amount  # stored as cents (subunits)
  t.string  :total_currency
end

# Model
class Order < ApplicationRecord
  money_attribute :total
end

Order.new(total: 19.99.to_money('USD')).total_amount # => 1999

# Migration
t.bigint :price

# Model (no change needed)
money_attribute :price, currency: 'USD'

class Invoice < ApplicationRecord
  money_attribute :total, mapping: {
    amount:   :total_amount,
    currency: :currency_code
  }
end

# Equality
Product.where(price: 10.mint('USD'))

# IN clause
Product.where(price: [10.mint('USD'), 20.mint('USD')])

# BETWEEN
Product.where(price: 10.mint('USD')..20.mint('USD'))

# Ordering
Product.order(price: :desc)

# Aggregation
Product.where(price: 10.mint('USD')).sum(:price)

Offer.where(price: 10.mint('EUR'))

Offer.where(price_amount: 10..20, price_currency: 'EUR')
Offer.where('price_amount > ? AND price_currency = ?', 10, 'EUR')

12.to_money('USD')    # => [USD 12.00]
12.dollars            # => [USD 12.00]
12.euros              # => [EUR 12.00]
'12.50'.mint('BRL')   # => [BRL 12.50]

# minting-rails
class Product < ApplicationRecord
  money_attribute :price, currency: 'USD'          # single column, fixed currency
  money_attribute :total                           # two columns, multi-currency
end

# money-rails
class Product < ApplicationRecord
  monetize :price_cents                            # single cents column, fixed currency
  monetize :total_cents, with_currency: :total_currency  # two columns, multi-currency
end

# minting-rails — any numeric column type
create_table :products do |t|
  t.decimal :price              # stores 12.34
  t.integer :discount           # stores 1234 (cents)
  t.bigint  :total_amount       # stores 1999 (cents)
  t.string  :total_currency
end

# money-rails — integer cents only
create_table :products do |t|
  t.integer :price_cents        # stores 1234 (cents)
  t.integer :discount_cents     # stores 350 (cents)
  t.integer :total_cents
  t.string  :total_currency
end

# minting-rails — pass any type, always get Mint::Money
product.price = 12.34          # stores 12.34 in decimal column
product.price = 1234           # stores 1234 in integer column
product.price = '$12.34'       # parses string
product.price                  # => [USD 12.34]

# money-rails — pass any type, always get Money
product.price_cents = 1234     # stores 1234
product.price = Money.new(1234, 'USD')
product.price                  # => #<Money fractional:1234 currency:USD>

# minting-rails (fixed-currency) — full type-aware querying
Product.where(price: 10.mint('USD'))
Product.where(price: [5.mint('USD'), 10.mint('USD')])
Product.where(price: 5.mint('USD')..15.mint('USD'))
Product.order(price: :desc)
Product.where(price: 10.mint('USD')).sum(:price)

# money-rails — query through cents column
Product.where(price_cents: 1000)
Product.where(price_cents: [500, 1000])
Product.where(price_cents: 500..1500)
Product.order(:price_cents)

# minting-rails — works with decimal columns out of the box
# migration: t.decimal :price
money_attribute :price, currency: 'USD'

product.price = 12.34
product.price           # => [USD 12.34]
product.read_attribute(:price)  # => [USD 12.34]

# money-rails — no decimal column support
# migration: t.decimal :price  ← not supported
# Must use integer cents:
# migration: t.integer :price_cents
monetize :price_cents
product.price_cents = 1234
product.price           # => #<Money fractional:1234 currency:USD>

# minting-rails
money_attribute :price   # expects price_amount + price_currency columns

offer = Offer.new(price: 15.to_money('EUR'))
offer.price             # => [EUR 15.00]
offer.price_amount      # => 15.0
offer.price_currency    # => "EUR"

# money-rails
monetize :price_cents, with_currency: :price_currency

offer = Offer.new(price: Money.new(1500, 'EUR'))
offer.price             # => #<Money fractional:1500 currency:EUR>
offer.price_cents       # => 1500
offer.price_currency    # => "EUR"

# minting-rails — same declaration works with any column type
money_attribute :price, currency: 'USD'

# t.decimal :price   → stores human-readable value (12.34)
# t.integer :price   → stores cents (1234)
# t.bigint  :price   → stores cents (1234)

# money-rails — must always match the column name
monetize :price_cents   # column must be price_cents
monetize :price         # column must be price — no support for other types