按前题数组值列出 collection 中的项目

Question

我有一个带有 collection、colleges 的 Jekyll 站点，我想按自定义 rankings 前言属性对其进行排序和显示。以下是 collection:

中的项目示例

---
title: Example College
score: 88
rankings:
  - top accredited colleges
  - most affordable
---

...

---
title: Sample College
score: 75
rankings:
  - most affordable
  - best online programs
---

...

---
title: Example University
score: 75
rankings:
  - top accredited colleges
  - best online programs
---

我想将不同的排名显示为标题，下面列出了大学：

top accredited colleges
- Example College
- Example University

most affordable
- Example College
- Sample College

best online programs
- Sample College
- Example University

我试过像这样使用 Liquid 的 group_by 过滤器：

{% assign groups = site.colleges | group_by: "rankings" %}
{% for group in groups %}
    <h2>{{ group.name }}</h2>
    <ul>
        {% for college in group.items %}
            <li>{{ college.title }}</li>
        {% endfor %}
    </ul>
{% endfor %}

但这似乎是通过完整数组的精确匹配对 rankings 前面的内容进行分组，而不是将它包含的不同值分开：

<h2>[top accredited colleges, most affordable]</h2>
<ul>
    <li>Example College</li>
</ul>

<h2>[most affordable, best online programs]</h2>
<ul>
    <li>Sample College</li>
</ul>

<!-- etc -->

如何从输出中的 rankings 前题数组中分离出各个值？

Answer 1

这可以解决问题：

{% assign allRankings = site.colleges | map: "rankings" %}
{% assign rankingArray = "" | split:"" %}
{% for rankings in allRankings %}
  {% assign rankingArray = rankingArray | concat: rankings | uniq %}
{% endfor %}
{% for ranking in rankingArray %}
  <h2>{{ ranking | capitalize }}</h2>
  <ul>
  {% for college in site.colleges %}
    {% if college.rankings contains ranking %}
    <li>{{ college.title }}</li>
    {% endif %}
  {% endfor %}
  </ul>
{% endfor %}

按前题数组值列出 collection 中的项目

List items from a collection by front matter array values

liquid

jekyll