节点集上的 XSLT 过滤和索引
我试图使用前同级轴、过滤器和索引器来检索 for-each 中的前一个节点来查找它。
问题是，我只想要选择器中与 XPath 匹配的第一个项目，但是，我似乎无法同时应用过滤器和索引器。索引器似乎覆盖了过滤器，因此我总是获得第一个前面的同级，而不是第一个与过滤器匹配的同级。
我尝试将其放入 foreach 内的变量中，但由于该变量无法更改，因此节点集始终是第二项的前一个同级值。
这是相关代码（尽可能多地去除噪音）。对 umbraco 噪音表示歉意（XSLT 用于为子导航生成一些相当复杂的标记，我无法轻松更改）。
<xsl:for-each select="$currentPage/ancestor-or-self::node[(@nodeTypeAlias='Discover' or @nodeTypeAlias='CampaignHome') and data[@alias='umbracoNaviHide'] != 1]/child::node[(@nodeTypeAlias='Discover' or @nodeTypeAlias='CampaignHome') and data[@alias='umbracoNaviHide'] != 1]">
<!--This variable is always set to the second item's preceding sibling-->
<xsl:variable name="precedingItem" select="preceding-sibling::node[data[@alias='umbracoNaviHide' != 1]]" />
<!--This variable always contains the second item even if /data/@alias='umbracoNaviHide' = 1 -->
<xsl:variable name="predingItemWithIndexer" select="preceding-sibling::node[data[@alias='umbracoNaviHide' != 1]][1]" />
<!-- this always prints out the id of the first item -->
<xsl:value-of select="position()" /> <xsl:value-of select="$precedingItem[1]/@id" />
</xsl:foreach>
我会使用第二个内联选择器，但由于索引器过滤器会覆盖其他过滤器，因此当 umbracoNaviHide = 1 时，它不会给出正确的值。
I'm trying to retreive the previous node in a for-each using the preceding-sibling axis, a filter and an indexer to find it.
The problem is, I only want the first item that matches the XPath in the selector however, I seem unable to apply both the filter and the indexer. The indexer seems to override the filter so I always get the first preceding sibling rather than the first one matching the filter.
I've tried putting this in a variable inside the foreach but since the variable cannot be changed the nodeset is always the second item's preceding sibling's values.
Here's the relevant code (chopped out as much noise as possible). Apologies for the umbraco noise (the XSLT is for generating some fairly complicated markup for a subnav which I can't change easily).
<xsl:for-each select="$currentPage/ancestor-or-self::node[(@nodeTypeAlias='Discover' or @nodeTypeAlias='CampaignHome') and data[@alias='umbracoNaviHide'] != 1]/child::node[(@nodeTypeAlias='Discover' or @nodeTypeAlias='CampaignHome') and data[@alias='umbracoNaviHide'] != 1]">
<!--This variable is always set to the second item's preceding sibling-->
<xsl:variable name="precedingItem" select="preceding-sibling::node[data[@alias='umbracoNaviHide' != 1]]" />
<!--This variable always contains the second item even if /data/@alias='umbracoNaviHide' = 1 -->
<xsl:variable name="predingItemWithIndexer" select="preceding-sibling::node[data[@alias='umbracoNaviHide' != 1]][1]" />
<!-- this always prints out the id of the first item -->
<xsl:value-of select="position()" /> <xsl:value-of select="$precedingItem[1]/@id" />
</xsl:foreach>
I would use the second selector inline but because the indexer filter is overriding the other filter it doesn't give the correct values when umbracoNaviHide = 1.
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这意味着：选择至少有一个不带
alias属性或带子属性不等于“umbracoNaviHide”data元素的所有前述同级node元素>alias编辑：这是正确的 XPath：
This means: select all the preceding sibling
nodeelements having at least one childdataelement without analiasattribute or with analiasattribute not equal to "umbracoNaviHide"EDIT: This is the correct XPath for this: