如何将数组传递给Rails中的字段?

您可以为大额付款添加其他关联,例如:

class Month < ActiveRecord::Base
  has_many :payments
  has_many :large_payments, :class_name => "Payment", :conditions => "value > 1000000"
end

之后你可以使用 fields_for

- fields_for :large_payments

我认为在模型方面封装这个逻辑比在视图中更好。

<%= f.fields_for :payments, @large_payments do |payment| %> ...