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<!doctype html>
<html class="no-js" lang="en">
<head>
<meta charset="utf-8" />
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<title>
任务介绍 - Elastic 搜索开发实战
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<meta name="description" content="Elastic 搜索开发实战，图书">
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<span style="font-size: 30px;"><a href="index.html">Elastic 搜索开发实战</a></span> <div style="float: right;"><a class="github-button" href="https://github.com/medcl/book-elastic-search-in-action" data-size="large" data-show-count="true" aria-label="Star medcl/book-elastic-search-in-action on GitHub">Star</a></div>
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<li class="sub_nav"><a title="谁应该读这本书" href="1.1_who_should_read_this_book.html">谁应该读这本书</a></li>
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<li><a title="基础准备" href="2.0_basic_concept.html">基础准备</a></li>
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<li class="sub_nav"><a title="开发调试工具介绍" href="2.2_dev_tools.html">开发调试工具介绍</a></li>
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<li class="sub_nav"><a title="任务介绍" href="3.1_task_intro.html">任务介绍</a></li>
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<div class="markdown-body">
<h1>任务介绍</h1>
<p>我们的目标网站是我们的 Elastic 中文社区：<a href="http://elasticsearch.cn">http://elasticsearch.cn</a>，为什么我们要改造其站内搜索功能呢？我们先来看下面的一张截图：</p>
<p><img src="media/15285964747097/15285983964703.jpg" alt=""/></p>
<p>我们搜索的关键字是 <code>Elastic 搜开发实战</code>，可以看到智能提示框，里面的推荐结果貌似有点糟糕，有些结果看上去完全没有体现出和关键字有什么关系，感觉搜了之后还是找不到有用的东西。我们再看一个。</p>
<p><img src="media/15285964747097/15285987753533.jpg" alt=""/></p>
<p>将一篇日报的完整标题作为关键字搜索，在搜索结果里面，居然不是排在第一位的。</p>
<p>我们再随便打开一篇文章：<a href="https://elasticsearch.cn/question/1023">https://elasticsearch.cn/question/1023</a>，内容如下图：</p>
<p><img src="media/15285964747097/15285998430298.jpg" alt=""/></p>
<p>我们随便复制一段文字：</p>
<pre><code>Understand the industrial trend of big data technology (e.g. elasticsearch, web crawler, Kafka).
</code></pre>
<p>然后放到搜索框里面检索一下，结果如下：</p>
<p><img src="media/15285964747097/15285997280401.jpg" alt=""/></p>
<p>可以看到，完全找不到我们的刚刚的那篇文章。</p>
<p>我们再来搜索一下 <code>学习</code>，看看结果：</p>
<p><img src="media/15285964747097/15286008013887.jpg" alt=""/></p>
<p>有不少结果返回，然后再搜索一下 拼音 <code>xuexi</code>，看看结果：</p>
<p><img src="media/15285964747097/15286007456235.jpg" alt=""/></p>
<p>可以看到只找到了一个信息。</p>
<p>我们再试试繁体 <code>學習</code>，看看搜索结果：<br/>
<img src="media/15285964747097/15286006755574.jpg" alt=""/></p>
<p>居然查询结果各不相同啊，但是对于搜索的用户来说，我本来就不知道有什么东西，我只是随便丢一个关键字就是想找找看，<code>学习</code>、<code>xuexi</code> 和 <code>學習</code> 应该无差别才对。</p>
<p>还有一个就是社区分享的 PPT，比如我想快速找到我感兴趣的 PPT，如下图：</p>
<p><img src="media/15285964747097/15285991022218.jpg" alt=""/></p>
<p>因为这个分享的功能是新开发的，相关内容也没有加入到数据库的索引里面，所以按 PPT 的标题、描述和 PPT 里面的文本都查不到。</p>
<p>另外结果多了之后，一页一页的找也很麻烦，而且如果我想找最近一个月的文章，或者按分类、标签或者作者进行查看，也不行。没有各个维度的统计。没有对搜索结果的再过滤。</p>
<p>这些都是用户的痛点。</p>
<p>也就是本章我们要解决的任务。</p>
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