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79 lines
2.3 KiB
Markdown
79 lines
2.3 KiB
Markdown
---
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title: "Indexes"
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date: "2013-07-01"
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aliases: ["/doc/indexes/", "/extras/indexes"]
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linktitle: "Overview"
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groups: ["indexes"]
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groups_weight: 10
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---
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Hugo includes support for user defined groupings of content called indexes.
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Indexes can be used to organize content in a variety of ways. For example, if I
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wanted to use a wordpress style organization I would create two indexes called
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"categories" and "tags". Other common uses would include categories, tags, groups,
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navigation, series and many more. Just think of an index as way to organize similar content.
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It's important to understand what Indexes do. At it's most basic form an index
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is simply a map of a key to a list of content values.
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In the hugo internals this is stored as `Site.Indexes[Plural][key][]pages`.
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For example all the content tagged with GoLang would be found at
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`Site.Indexes["tags"]["golang"]`.
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For a
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more complete example see the source of [this docs site](http://github.com/spf13/hugo/docs/).
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## Defining Indexes for a site
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Indexes must be defined in the site configuration, before they
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can be used throughout the site.
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Here is an example configuration in YAML that specifies two indexes.
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Notice the format is **singular key** : *plural value*. While
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we could use an inflection library to pluralize this, they currently
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support only a few languages, so instead we've opted for user defined
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pluralization.
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### config.yaml
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{{% highlight yaml %}}
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---
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indexes:
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tag: "tags"
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category: "categories"
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baseurl: "http://spf13.com/"
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title: "Steve Francia is spf13.com"
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---
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{{% /highlight %}}
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## Assigning index values to content
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Once an index is defined at the site level, any piece of content
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can be assigned to it regardless of content type or section.
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Assigning content to an index is done in the front matter.
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Simply create a variable with the *plural* name of the index
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and assign all keys you want this content to match against.
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**Index values are case insensitive**
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### Example
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{{% highlight json %}}
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{
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"title": "Hugo: A fast and flexible static site generator",
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"tags": [
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"Development",
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"golang",
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"fast",
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"Blogging"
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],
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"categories" : [
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"Development"
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]
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"slug": "hugo",
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"project_url": "http://github.com/spf13/hugo"
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}
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{{% /highlight %}}
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