如何将两个 XML 文件与 Nokogiri 合并

Question

我正在尝试将两个独立但相关的文件与 Nokogiri 结合起来。 如果“ItemNumber”相同，我想将“产品”和“产品定价”结合起来。

我加载了文件，但我不知道如何将两者结合起来。

产品档案：

<Products>
  <Product>
    <Name>36-In. Homeowner Bent Single-Bit Axe Handle</Name>
    <ProductTypeId>0</ProductTypeId>
    <Description>This single bit curved grip axe handle is made for 3 to 5 pound axes. A good quality replacement handle made of American hickory with a natural wax finish. Hardwood handles do not conduct electricity and American Hickory is known for its strength, elasticity and ability to absorb shock. These handles provide exceptional value and economy for homeowners and other occasional use applications. Each Link handle comes with the required wedges, rivets, or epoxy needed for proper application of the tool head.</Description>
    <ActiveFlag>Y</ActiveFlag>
    <ImageFile>100024.jpg</ImageFile>
    <ItemNumber>100024</ItemNumber>
    <ProductVariants>
      <ProductVariant>
        <Sku>100024</Sku>
        <ColorName></ColorName>
        <SizeName></SizeName>
        <SequenceNo>0</SequenceNo>
        <BackOrderableFlag>N</BackOrderableFlag>
        <InventoryLevel>0</InventoryLevel>
        <ColorCode></ColorCode>
        <SizeCode></SizeCode>
        <TaxableFlag>Y</TaxableFlag>
        <VariantPromoGroupCode></VariantPromoGroupCode>
        <PricingGroupCode></PricingGroupCode>
        <StartDate xsi:nil="true"></StartDate>
        <EndDate xsi:nil="true"></EndDate>
        <ActiveFlag>Y</ActiveFlag>
      </ProductVariant>
    </ProductVariants>
  </Product>
</Products>

产品定价字段：

<ProductPricing>
  <ItemNumber>100024</ItemNumber>
  <AcquisitionCost>8.52</AcquisitionCost>
  <MemberCost>10.7</MemberCost>
  <Price>14.99</Price>
  <SalePrice xsi:nil="true"></SalePrice>
  <SaleCode>0</SaleCode>
</ProductPricing>

我正在寻找生成这样的文件：

<Products>
  <Product>
    <Name>36-In. Homeowner Bent Single-Bit Axe Handle</Name>
    <ProductTypeId>0</ProductTypeId>
    <Description>This single bit curved grip axe handle is made for 3 to 5 pound axes. A good quality replacement handle made of American hickory with a natural wax finish. Hardwood handles do not conduct electricity and American Hickory is known for its strength, elasticity and ability to absorb shock. These handles provide exceptional value and economy for homeowners and other occasional use applications. Each Link handle comes with the required wedges, rivets, or epoxy needed for proper application of the tool head.</Description>
    <ActiveFlag>Y</ActiveFlag>
    <ImageFile>100024.jpg</ImageFile>
    <ItemNumber>100024</ItemNumber>
    <ProductVariants>
      <ProductVariant>
        <Sku>100024</Sku>
        <ColorName></ColorName>
        <SizeName></SizeName>
        <SequenceNo>0</SequenceNo>
        <BackOrderableFlag>N</BackOrderableFlag>
        <InventoryLevel>0</InventoryLevel>
        <ColorCode></ColorCode>
        <SizeCode></SizeCode>
        <TaxableFlag>Y</TaxableFlag>
        <VariantPromoGroupCode></VariantPromoGroupCode>
        <PricingGroupCode></PricingGroupCode>
        <StartDate xsi:nil="true"></StartDate>
        <EndDate xsi:nil="true"></EndDate>
        <ActiveFlag>Y</ActiveFlag>
      </ProductVariant>
    </ProductVariants>
  </Product>
  <ProductPricing>
    <ItemNumber>100024</ItemNumber>
    <AcquisitionCost>8.52</AcquisitionCost>
    <MemberCost>10.7</MemberCost>
    <Price>14.99</Price>
    <SalePrice xsi:nil="true"></SalePrice>
    <SaleCode>0</SaleCode>
  </ProductPricing>
</Products>

这是我到目前为止的代码：

require 'csv'
require 'nokogiri'

xml = File.read('lateApril-product-pricing.xml')
xml2 = File.read('lateApril-master-date')

doc = Nokogiri::XML(xml)
doc2 = Nokogiri::XML(xml2)

pricing_data = []
item_number = []

doc.xpath('//ProductsPricing/ProductPricing').each do |file|

  itemNumber = file.xpath('./ItemNumber').first.text
  variant_Price = file.xpath('./Price').first.text

  pricing_data << [ itemNumber, variant_Price ]

  item_number << [ itemNumber ]
end 

puts item_number ## This prints all the item number but i have no idea how to loop through them and combine them with Product XML

doc2.xpath('//Products/Product').each do |file|
  itemNumber = file.xpath('./ItemNumber').first.text #not sure how to write the conditions here since i don't have pricing fields available in this method
end 

Answer 1

试试这个：

require 'nokogiri'

doc1 = Nokogiri::XML(<<EOT)
<Products>
  <Product>
    <Name>36-In. Homeowner Bent Single-Bit Axe Handle</Name>
  </Product>
</Products>
EOT

doc2 = Nokogiri::XML(<<EOT)
<ProductPricing>
  <ItemNumber>100024</ItemNumber>
</ProductPricing>
EOT

doc1.at('Product').add_next_sibling(doc2.at('ProductPricing'))

结果是：

puts doc1.to_xml

# >> <?xml version="1.0"?>
# >> <Products>
# >>   <Product>
# >>     <Name>36-In. Homeowner Bent Single-Bit Axe Handle</Name>
# >>   </Product><ProductPricing>
# >>   <ItemNumber>100024</ItemNumber>
# >> </ProductPricing>
# >> </Products>

请，当您询问时，将示例输入和预期的结果 output 剥离到绝对的、裸露的、最小的。 除此之外的任何事情都会浪费空间、眼睛时间和大脑 CPU。

这是未经测试的代码，但如果我要合并两个包含多个<ItemNumber>节点的文件，我将从这里开始：

require 'nokogiri'

doc1 = Nokogiri::XML(<<EOT)
<Products>
  <Product>
    <Name>36-In. Homeowner Bent Single-Bit Axe Handle</Name>
    <ItemNumber>100024</ItemNumber>
  </Product>
</Products>
EOT

doc2 = Nokogiri::XML(<<EOT)
<ProductPricing>
  <ItemNumber>100024</ItemNumber>
</ProductPricing>
EOT

# build a hash containing the item numbers in doc1 for each product
doc1_products_by_item_numbers = doc1.search('Product').map { |product|
  item_number = product.at('ItemNumber').value
  [
    item_number,
    product
  ]
}.to_hash

# build a hash containing the item numbers in doc2 for each product pricing
doc2_products_by_item_numbers = doc2.search('ProductPricing').map { |pricing| 
  item_number = pricing.at('ItemNumber').value
  [
    item_number,
    pricing
  ]
}.to_hash

# append doc2 entries to doc1 after each product based on item numbers
doc1_products_by_item_numbers.keys.each { |k|
  doc1_products_by_item_numbers[k].add_next_sibling(doc2_products_by_item_numbers[k])
}