在Lithium/Freemarker中删除重复项目

问题描述：

我正在使用Lithium自定义组件创建撰写了大多数博客文章的用户列表。我有一个写过博客文章的用户列表，然后通过休息电话来获取每个用户编写的博客文章的数量。在Lithium/Freemarker中删除重复项目

<#assign authors = rest("blogs/id/audiofile/posts")> 

<#list authors.node_message_context.message.author as t> 
<#assign count = rest("${[email protected]}/posts/style/blog/count")> 
<#assign orderedCount = count.value> 
<#list orderedCount as c> 
<ul> 
<li>Blog posts ${c} userid ${[email protected]} 
</ul> 
</#list> 
</#list>

给出

Blog posts 4 userid /users/id/2477 

Blog posts 4 userid /users/id/2477 

Blog posts 4 userid /users/id/2477

我的问题的输出如何删除此列表中的重复的作者吗？

答

的FAQ文章 http://freemarker.org/docs/app_faq.html#faq_modify_seq_and_map 概述为什么这是棘手的。基本上，它要求修改您的RESTful接口做的工作适合你：

<#assign authors = rest("blogs/id/audiofile/uniquauthors")>

将是一个新的RESTful接口的例子，然后工作是在服务器端完成。

答

@Wolfgang Fahl希望我们可以修改Lithium REST API =）！

不幸的是，这是不是这样的，所以我们必须对付我们得到什么，也可以做这样的事情：

<#-- this variable we need to store unique author ids --> 
<#assign authorids = [] /> 
<#-- I'd use API v2 here, think for such stuff it's more powerful than v1 --> 
<#assign query = 'SELECT author FROM messages WHERE conversation.style = "blog" AND board.id = "audiofiles"'?url /> 
<#assign response = rest("2.0", "https://stackoverflow.com/search?q=" + query) /> 

<#-- the response object will contain a list of blog post authors, 
    we loop trough them to get uniqe ids of every user that has written 
    a blog post, we need them later --> 
<#list response.data.items as author> 
    <#-- make sure each author just gets added once --> 
    <#if !authorids?seq_contains(author.id)> 
     <#assign authorids = authorids + [author.id] /> 
    </#if> 
</#list> 

<#-- now we loop trough the unique author ids and ask for the amount of 
    blog posts they have written --> 
<ul> 
<#list authorids as id> 
    <#assign query = 'SELECT count(*) FROM messages WHERE author.id = id AND board.id = "audiofiles"'?url /> 
    <#assign response = rest("2.0", "https://stackoverflow.com/search?q=" + query) /> 

    <li>User with ID ${id} has written ${response.data.count} blog posts</li> 
</#list> 
</ul>

代码是未经测试，所以不是100％肯定，如果它的工作原理，但我希望我选择的方法通过上面的代码变得清晰...

在Lithium/Freemarker中删除重复项目

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