问题描述
我正在使用 money-rails gem 并想在我的视图中显示不同货币的列表,但我现在拥有的代码不起作用.
I'm using the money-rails gem and want to show in my view a list of different currencies but the code I have now isn't working.
我有我的 Price
模型以及 in_cents
和 currency
字段:
I have my Price
model and the fields in_cents
and currency
:
create_table :prices do |t|
t.integer :in_cents, default: 0, null: false
t.string :currency, default: 'USD', null: false
现在根据 Money gem 和 Money-Rails 文档,我必须执行以下操作:
Now according to the Money gem and Money-Rails docs I had to do something like:
class Price < ActiveRecord::Base
monetize :in_cents, as: "amount", with_model_currency: :in_cents_currency
def all_currencies(hash)
hash.keys
end
比我对简单形式 gem 的看法:
Than my view with simple form gem:
= f.input :currency, collection: all_currencies(Money::Currency.table)
= f.input :amount, required: false
但这给了我错误:
undefined method `all_currencies' for #<#<Class:0xd154124>:0xd15bab4>
为什么?
附言
我想显示 ISO 代码和名称,例如 United States Dollar (USD)
.
I want to show the ISO Code and the name like United States Dollar (USD)
.
推荐答案
你的 all_currencies 方法是一个实例方法,你不是在实例上调用它.
Your all_currencies method is an instance method, and you're not calling it on an instance.
添加self.all_currencies
,然后用Price.all_currencies
希望能帮到你
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