如何生成 XML 格式的 JSON 像 Ruby 对象答案

【问题标题】：How to generate an XML form a JSON like Ruby object如何生成 XML 格式的 JSON 像 Ruby 对象
【发布时间】：2015-04-06 22:26:30
【问题描述】：

您好，我需要生成一个如下所示的 XML：

<?xml version="1.0" encoding="UTF-8" ?>
	<Addresses>
		<CurrentAddress>
			<Country>United Kingdom</Country>
			<ZipPostcode>OX4 2QX</ZipPostcode>
			<AddressLine1>36 Brasenose Driftway</AddressLine1>
			<AddressLine2>Oxford</AddressLine2>
			<AddressLine3 />
			<FirstYearOfResidence>2002</FirstYearOfResidence>
			<LastYearOfResidence>2014</LastYearOfResidence>
		</CurrentAddress>
		<PreviousAddress1>
			<Country>United Kingdom</Country>
			<ZipPostcode>AB1 1AA</ZipPostcode>
			<AddressLine1>21 A Street</AddressLine1>
			<AddressLine2>Aberdeen</AddressLine2>
			<AddressLine3 />
			<FirstYearOfResidence>1998</FirstYearOfResidence>
			<LastYearOfResidence>2002</LastYearOfResidence>
		</PreviousAddress1>
	</Addresses>

即我只需要一个“地址”块，但我有一些问题我当前的对象表示：

    address_count = 0
    running = []

    @person.addresses.each do |address|
      Rails.logger.debug 'Adding address'
      if address_count == 0
        Rails.logger.debug 'Adding current address'
        running.push(
            CurrentAddress: {
                Country: address.country,
                ZipPostcode: address.postcode,
                AddressLine1: address.line1,
                AddressLine2: address.line2,
                AddressLine3: address.town_city,
                FirstYearOfResidence: address.from_year,
                LastYearOfResidence: address.to_year
            }
        )
      else
        Rails.logger.debug 'Adding previous address'
        running.push(
            "PreviousAddress#{address_count}" => {
                Country: address.country,
                ZipPostcode: address.postcode,
                AddressLine1: address.line1,
                AddressLine2: address.line2,
                AddressLine3: address.town_city,
                FirstYearOfResidence: address.from_year,
                LastYearOfResidence: address.to_year
            }
        )
      end
      address_count += 1
    end

在 JSON 中会像下面的代码：

{
"Addresses": [
      {
        "CurrentAddress": {
          "Country": "United Kingdom",
          "ZipPostcode": "OX4 2QX",
          "AddressLine1": "36 Brasenose Driftway",
          "AddressLine2": "Oxford",
          "AddressLine3": null,
          "FirstYearOfResidence": 2002,
          "LastYearOfResidence": 2014
        }
      },
      {
        "PreviousAddress1": {
          "Country": "United Kingdom",
          "ZipPostcode": "AB1 1AA",
          "AddressLine1": "21 A Street",
          "AddressLine2": "Aberdeen",
          "AddressLine3": null,
          "FirstYearOfResidence": 1998,
          "LastYearOfResidence": 2002
        }
      }
    ]
}

这实际上生成了一个带有两个“地址”块的 XML。

有人知道我如何生成我的对象的表示（如果不是 JSON 也可以），在 XML 转换之后看起来像我需要的那个？

我也在考虑直接生成 XML。在这种情况下，如何从上面发布的 Ruby Hash 生成所需的 XML？

只是为了记录，我需要它，因为我正在使用 SAVON（Ruby 的 SOAP 客户端）。

非常感谢！

【问题讨论】：

标签： ruby-on-rails ruby xml json savon

【解决方案1】：

running 不应该是一个数组，而是一个哈希。这样您就可以将不同的地址与不同的键（CurrentAddress、PreviousAddress1 等）关联起来

最后，您创建一个新的哈希，将整个“运行”对象与“地址”键关联起来。

def addresses_as_xml
  address_count = 0
  running = Hash.new

  @person.addresses.each do |address|
    if address_count == 0
      Rails.logger.debug 'Adding current address'
      running["CurrentAddress"] = {
              Country: address.country,
              ZipPostcode: address.postcode,
              AddressLine1: address.line1,
              AddressLine2: address.line2,
              AddressLine3: address.town_city,
              FirstYearOfResidence: address.from_year,
              LastYearOfResidence: address.to_year
          }
    else
      Rails.logger.debug 'Adding previous address'
      running["PreviousAddress#{address_count}"] = {
              Country: address.country,
              ZipPostcode: address.postcode,
              AddressLine1: address.line1,
              AddressLine2: address.line2,
              AddressLine3: address.town_city,
              FirstYearOfResidence: address.from_year,
              LastYearOfResidence: address.to_year
          }
    end
    address_count += 1
  end

  person_summary = {"Addresses" => running}
  person_summary.to_xml
end

另外一点：在我看来，这个方法只对 Person-object 的地址起作用 => 也许它应该位于模型 Person 中

【讨论】：