Attribute DSL for mapping csv columns to Virtus attributes

connections.rb

    # Straight Virtus
    attribute :invoice_date,          DateTime,                     default: :_invoice_date
    attribute :invoice_number,        String,                       default: :_invoice_number
    attribute :invoice_amount,        RowParser::Attributes::Money, default: :_invoice_amount
    attribute :invoice_currency_code, String,                       default: :_invoice_currency_code

    # Connections DSL

    # multiple attribute connections
    connect_attributes do
      invoice_date          "invoice date",          DateTime
      invoice_number        "invoice number",        String
      invoice_amount        "invoice amount",        Money
      invoice_currency_code "invoice currency code", String
    end

    # or connect one at a time
    connect "invoice date", :invoice_date, DateTime

Very cool.

Declare me a heretic, but I think {} would be better than a do block here.

Where do defaults come from? naming convention?