是否可以将Ruby货币列表过滤为只有活动的货币？

Question

我在Rails应用中使用money gem进行货币换算，并需要为表单选择标记生成货币列表。

建议的文件依赖拨打Money::Currency.table获取所有货币的列表，但这包括非iso货币（例如比特币）和旧货币（例如三个无效的津巴布韦美元条目）。

有没有办法只获取一个有效的ISO货币代码列表，而无需维护我自己的列表？

Answer 1

钱宝石不包括separate lists，但不幸的是，他们是merged together：

def load_currencies 
    currencies = parse_currency_file("currency_iso.json") 
    currencies.merge! parse_currency_file("currency_non_iso.json") 
    currencies.merge! parse_currency_file("currency_backwards_compatible.json") 
end 

您可以手动调用代码获得刚currency_iso.json列表：但是这是

Money::Currency.send(:parse_currency_file, 'currency_iso.json') 
#=> { 
# :aed=>{:priority=>100, :iso_code=>"AED", :name=>"United Arab Emirates Dirham", :symbol=>"د.إ", :alternate_symbols=>["DH", "Dhs"], :subunit=>"Fils", :subunit_to_unit=>100, :symbol_first=>true, :html_entity=>"", :decimal_mark=>".", :thousands_separator=>",", :iso_numeric=>"784", :smallest_denomination=>25}, 
# :afn=>{:priority=>100, :iso_code=>"AFN", :name=>"Afghan Afghani", :symbol=>"؋", :alternate_symbols=>["Af", "Afs"], :subunit=>"Pul", :subunit_to_unit=>100, :symbol_first=>false, :html_entity=>"", :decimal_mark=>".", :thousands_separator=>",", :iso_numeric=>"971", :smallest_denomination=>100}, 
# :all=>{:priority=>100, :iso_code=>"ALL", :name=>"Albanian Lek", :symbol=>"L", :disambiguate_symbol=>"Lek", :alternate_symbols=>["Lek"], :subunit=>"Qintar", :subunit_to_unit=>100, :symbol_first=>false, :html_entity=>"", :decimal_mark=>".", :thousands_separator=>",", :iso_numeric=>"008", :smallest_denomination=>100}, 
# ... 
# :zar=>{:priority=>100, :iso_code=>"ZAR", :name=>"South African Rand", :symbol=>"R", :alternate_symbols=>[], :subunit=>"Cent", :subunit_to_unit=>100, :symbol_first=>true, :html_entity=>"R", :decimal_mark=>".", :thousands_separator=>",", :iso_numeric=>"710", :smallest_denomination=>10}, 
# :zmk=>{:priority=>100, :iso_code=>"ZMK", :name=>"Zambian Kwacha", :symbol=>"ZK", :disambiguate_symbol=>"ZMK", :alternate_symbols=>[], :subunit=>"Ngwee", :subunit_to_unit=>100, :symbol_first=>false, :html_entity=>"", :decimal_mark=>".", :thousands_separator=>",", :iso_numeric=>"894", :smallest_denomination=>5}, 
# :zmw=>{:priority=>100, :iso_code=>"ZMW", :name=>"Zambian Kwacha", :symbol=>"ZK", :disambiguate_symbol=>"ZMW", :alternate_symbols=>[], :subunit=>"Ngwee", :subunit_to_unit=>100, :symbol_first=>false, :html_entity=>"", :decimal_mark=>".", :thousands_separator=>",", :iso_numeric=>"967", :smallest_denomination=>5}} 
# } 

注一个私人的方法，所以它可能在未来的版本中改变