Ruby on rails Ruby，合并两个不同的对象

我需要在RubyonRails应用程序中合并到不同的对象。我有我的发票对象：

class Invoice < ActiveRecord::Base {
                           :id => :integer,
                      :user_id => :integer,
                  :description => :text,
                             ......
                       :status => :string,
                        :price => :float
}

但返回一个数组的数组：

[
    [{invoice},{payment}],
    [{invoice},{payment}],
    ...
]

我想回报的是：

[
    {invoice, :email_payment, :created_at_payment},
    {invoice_1, :email_payment, :created_at_payment},
    ...
]

---

如何才能做到这一点？

我将添加

电子邮件支付

和

在付款时创建

作为发票模型的方法，但您可以通过以下方法实现：

user.invoices.where(hide: false).map do |invoice|
  invoice.attributes.merge({ 
    email_payment: invoice.payments.last.email,
    created_at_payment: invoice.payments.last.created_at
  })
end

---

你不能在你的

Invoice

类中创建

email\u payment

和

created\u at\u payment

方法，并且只使用

Invoice

对象吗？是的，但是从逻辑的角度来看，这没有多大意义，我希望有更好的解决方案！这太完美了，正是我想要的！

[
    [{invoice},{payment}],
    [{invoice},{payment}],
    ...
]

[
    {invoice, :email_payment, :created_at_payment},
    {invoice_1, :email_payment, :created_at_payment},
    ...
]

user.invoices.where(hide: false).map do |invoice|
  invoice.attributes.merge({ 
    email_payment: invoice.payments.last.email,
    created_at_payment: invoice.payments.last.created_at
  })
end