Question

我正在编写一个内部应用程序来监控我们亚马逊列出的产品，并坚持使用Amazon Product Advertising API (amazon-ecs) Ruby gem。我想在屏幕上显示类似于此的浏览节点：

“根类别” - ＆gt;所有子类别 - ＆gt;最终类别（项目所在的实际类别）

    <BrowseNode>
<BrowseNodeId>770071031</BrowseNodeId>
<Name>Robotic Vacuums</Name>
<Ancestors>
  <BrowseNode>
  <BrowseNodeId>125698031</BrowseNodeId>
  <Name>Vacuums</Name>
    <Ancestors>
    <BrowseNode>
    <BrowseNodeId>3147711</BrowseNodeId>
    <Name>Vacuums &amp; Floor Care</Name>
      <Ancestors>
        <BrowseNode>
        <BrowseNodeId>3576359031</BrowseNodeId>
        <Name>Vacuuming, Cleaning &amp; Ironing</Name>
          <Ancestors>
            <BrowseNode>
            <BrowseNodeId>391784011</BrowseNodeId>
            <Name>Kitchen &amp; Home Appliances</Name>
              <Ancestors>
              <BrowseNode>
              <BrowseNodeId>3147411</BrowseNodeId>
              <Name>Categories</Name>
              <IsCategoryRoot>1</IsCategoryRoot>
                <Ancestors>
                <BrowseNode>
                <BrowseNodeId>11052681</BrowseNodeId>
                <Name>Kitchen &amp; Home</Name>
                  <Ancestors>
                  <BrowseNode>
                  <BrowseNodeId>11052591</BrowseNodeId>
                  <Name>Home &amp; Garden</Name>
                  <Ancestors>
                    <BrowseNode>
                    <BrowseNodeId>3146281</BrowseNodeId>
                    <Name>Home &amp; Garden</Name>
                    </BrowseNode>
                  </Ancestors>
                </BrowseNode>
                </Ancestors>
                </BrowseNode>
              </Ancestors>
            </BrowseNode>
            </Ancestors>
          </BrowseNode>
          </Ancestors>
        </BrowseNode>
      </Ancestors>
    </BrowseNode>
  </Ancestors>
  </BrowseNode>
</Ancestors>
</BrowseNode>

所以上面应该显示为：

Home＆amp;花园 - ＆gt;厨房＆amp;首页 - ＆gt;厨房＆amp;家用电器 - ＆gt;吸尘，清洁和熨烫 - ＆gt;吸尘器＆amp;地板护理 - ＆gt;真空

我尝试了get_array和get_hash，但这些都返回了一个长字符串的值。

有没有办法轻松地使用amazon-ecs gem做我想做的事情，还是应该将字符串作为XML处理并尝试相应地循环？

Answer 1

这是一种简单的方法。如果没有任何标准显示您如何确定哪些<Name>节点是可接受的，则返回所有节点：

require 'nokogiri'

xml = <<EOT
<BrowseNode>
<BrowseNodeId>770071031</BrowseNodeId>
<Name>Robotic Vacuums</Name>
<Ancestors>
  <BrowseNode>
  <BrowseNodeId>125698031</BrowseNodeId>
  <Name>Vacuums</Name>
    <Ancestors>
    <BrowseNode>
    <BrowseNodeId>3147711</BrowseNodeId>
    <Name>Vacuums &amp; Floor Care</Name>
      <Ancestors>
        <BrowseNode>
        <BrowseNodeId>3576359031</BrowseNodeId>
        <Name>Vacuuming, Cleaning &amp; Ironing</Name>
          <Ancestors>
            <BrowseNode>
            <BrowseNodeId>391784011</BrowseNodeId>
            <Name>Kitchen &amp; Home Appliances</Name>
              <Ancestors>
              <BrowseNode>
              <BrowseNodeId>3147411</BrowseNodeId>
              <Name>Categories</Name>
              <IsCategoryRoot>1</IsCategoryRoot>
                <Ancestors>
                <BrowseNode>
                <BrowseNodeId>11052681</BrowseNodeId>
                <Name>Kitchen &amp; Home</Name>
                  <Ancestors>
                  <BrowseNode>
                  <BrowseNodeId>11052591</BrowseNodeId>
                  <Name>Home &amp; Garden</Name>
                  <Ancestors>
                    <BrowseNode>
                    <BrowseNodeId>3146281</BrowseNodeId>
                    <Name>Home &amp; Garden</Name>
                    </BrowseNode>
                  </Ancestors>
                </BrowseNode>
                </Ancestors>
                </BrowseNode>
              </Ancestors>
            </BrowseNode>
            </Ancestors>
          </BrowseNode>
          </Ancestors>
        </BrowseNode>
      </Ancestors>
    </BrowseNode>
  </Ancestors>
  </BrowseNode>
</Ancestors>
</BrowseNode>
EOT
doc = Nokogiri::XML(xml)

这是查找节点的代码：

doc.search('Name').map(&:text).reverse.uniq.join(' -> ')
# => "Home & Garden -> Kitchen & Home -> Categories -> Kitchen & Home Appliances -> Vacuuming, Cleaning & Ironing -> Vacuums & Floor Care -> Vacuums -> Robotic Vacuums"

有些条目是重复的，因此uniq会清除它们。

参见＆＃34; How to avoid joining all text from Nodes when scraping＆＃34;还

如何迭代通过amazon-ecs gem item查找调用返回的browsenodes？

1 个答案: