Elixir library for working with monetary values. Dinero is slang for money.

  iex> ten_bucks = Dinero.new(10, :USD)
  %Dinero{amount: 1000, currency: :USD}
  iex> twelve_bucks = Dinero.new(12, :USD)
  %Dinero{amount: 1200, currency: :USD}
  iex> two_bucks = Dinero.subtract(twenty_bucks, ten_bucks)
  %Dinero{amount: 200, currency: :USD}
  iex> four_bucks = Dinero.multiply(two_bucks, 2)
  %Dinero{amount: 400, currency: :USD}
  iex> convert = Dinero.convert(four_bucks, :UAH, 26.2)
  %Dinero{amount: 10480, currency: :UAH}
  iex> d = ~m[924.06]uah
  %Dinero{amount: 92406, currency: :UAH}
  iex> "Amount #{d}"
  "Amount 924.06"
  iex> Dinero.new(1.0e4, :USD) 
  %Dinero{amount: 1000000, currency: :USD}
  iex> Dinero.parse("1312.14")
  %Dinero{amount: 131214, currency: :USD}

Dinero.Ecto.DineroWithCurrency is an Ecto type that allows saving amount of dinero with currency to database.

1. Create custom Postrgres type

   def up do
     execute "CREATE TYPE public.dinero_with_currency AS (amount integer, currency char(3))"
   end
   
   def down do
     execute "DROP TYPE public.dinero_with_currency"
   end

2. Add column to the table

   alter table (:products) do
     add :price, :dinero_with_currency
   end

3. Add field to the schema

   schema "products" do
     field :price, Dinero.Ecto.DineroWithCurrency
   end

4. Save to DB:

   iex> Repo.insert %Product{price: Dinero.new(20, :USD)}
   [debug] QUERY OK db=2.6ms decode=0.5ms queue=0.4ms
     INSERT INTO "products" ("price","inserted_at","updated_at") VALUES ($1,$2,$3) RETURNING "id" [{2000, "USD"}, ~N[2019-07-15 12:47:38], ~N[2019-07-15 12:47:38]]
   {:ok,
     %EctoCustomType.Product{
     __meta__: #Ecto.Schema.Metadata<:loaded, "products">,
     id: 1,
     inserted_at: ~N[2019-07-15 12:47:38],
     price: %Dinero{amount: 2000, currency: :USD},
     updated_at: ~N[2019-07-15 12:47:38]
   }}

5. Get from DB:

   iex> Repo.all(Product)
   [debug] QUERY OK source="products" db=1.2ms queue=1.3ms
   SELECT p0."id", p0."price", p0."inserted_at", p0."updated_at" FROM "products" AS p0 []
   [
     %EctoCustomType.Product{
       __meta__: #Ecto.Schema.Metadata<:loaded, "products">,
       id: 1,
       inserted_at: ~N[2019-07-15 12:47:38],
       price: %Dinero{amount: 2000, currency: :USD},
       updated_at: ~N[2019-07-15 12:47:38]
     }
   ]
   
   

# Sigils for Dinero
import Dinero.Sigil

iex> ~m[100]UAH
%Dinero{amount: 10000, currency: :UAH}

# Default currency is USD
iex> ~m[100]
%Dinero{amount: 10000, currency: :USD}

It is available in Hex and can be installed by adding dinero to your list of dependencies in mix.exs:

def deps do
  [
    {:dinero, "~> 1.3"}
  ]
end

Documentation can be found here

• Slava Fir, MLSDev

Dinero is released under the MIT license. See LICENSE for details.

Dinero is maintained by MLSDev, Inc. We specialize in providing all-in-one solution in mobile and web development. Our team follows Lean principles and works according to agile methodologies to deliver the best results reducing the budget for development and its timeline.

Find out more here and don't hesitate to contact us!