Question

我需要在Ruby on Rails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
}

我的付款对象：

class Payment < ActiveRecord::Base {
            :id => :integer,
         :token => :string,
    :invoice_id => :integer,
    :created_at => :datetime,
    :updated_at => :datetime,
         :email => :string
}

他们之间有1对多的关系：

class Invoice < ActiveRecord::Base
  has_many :payments

class Payment < ActiveRecord::Base
  belongs_to :invoice

现在我要做的是返回Invoice对象和相关付款对象的：email和：created_at字段。现在我用zip函数返回两个对象：

:invoices => (user.invoices.where(:hide => false).zip user.invoices.map{|x| x.payments.last}),

但返回一个数组数组：

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

我想要归还的是：

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

我该怎么做？

Answer 1

我会将email_payment和created_at_payment添加为发票模型的方法，但您可以通过以下方式实现：

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

Ruby，合并两个不同的对象

1 个答案: