Money-Rails Gem - instance currencies

Question

I have a model in my rails 4 app called funding.

I am using Money Rails to handle money/currency components - https://github.com/RubyMoney/money-rails

My funding model has 3 funding attributes called amount_expenses, amount_honorarium and amount_principal_financing.

The funding model also has a currency attribute for the user creating the instance to choose which currency should be used for each of the three funding attributes.

When I ran a migration to add_monetize to each of the three funding attributes, it created three corresponding currency attributes.

Do I need them? Can I ask the user to select a currency once per instance and then save the three funding attributes using that currency? How would that work? If I just have one currency attribute in the funding table, will monetise know how to choose that to display the three funding amounts?

The funding table has:

 t.boolean  "expenses"
    t.boolean  "honorarium"
    t.boolean  "financing"
    t.string   "currency"
    t.string   "size"
    t.integer  "amount_expenses"
    t.integer  "amount_honorarium"
    t.integer  "amount_principal_financing"
    t.float    "return_on_finance"
    t.integer  "period_of_return"
    t.text     "expense_description"
    t.integer  "scope_id"
    t.integer  "amount_expenses_pennies",             default: 0,     null: false
    t.string   "amount_expenses_currency",            default: "GBP", null: false
    t.integer  "amount_honorarium_pennies",           default: 0,     null: false
    t.string   "amount_honorarium_currency",          default: "GBP", null: false
    t.integer  "amount_principal_financing_pennies",  default: 0,     null: false
    t.string   "amount_principal_financing_currency", default: "GBP", null: false

end

Thank you

Cesium

Could you document this a bit more? What currency attributes were created? Why should the user chose a currency for each attribute? Also, link the Gem you're using. – Ammonate

I replied here how to use it, check if it helps you #30011065 – Jubilee

Hi, that's a different question. I have three attributes in one table that I want to monetise. The system has created 3 separate currency fields. I'd like to use one. – Cesium

Answer 1

For all of you three fields you can simply write

monetize :field1, :field2, :field3, with_model_currency: :currency_field

Only one currency column is sufficient in this case.

Jubilee

Hi, this didn't work for me, but I'm debugging other issues so it might be what's causing something to go wrong. – Cesium

Thanks very much. I think I need to remove all the old currency refs and try again. I'll let you know. Thanks though – Cesium

with_model_currency option doesn't work for me with rails6 mongoid v7. field :price, type: Money, with_model_currency: :currency Getting the following error: Mongoid::Errors::InvalidFieldOption message: ` Invalid option :with_model_currency provided for field :price.` Any help would be appreciated. – Gazpacho