ページリソース

ページリソース (page resource) は ページバンドル (page bundle) からしかアクセスできません。 これを配置するディレクトリには、そのルートに index.md か _index.md を置きます。 ページリソースは、これをバンドルしているページでのみ利用可能です。

以下の例において first-post はページバンドルであり、10 個のページリソースにアクセスしています。 そのリソースとは具体的に、オーディオ、データ、ドキュメント、イメージ、ビデオです。 一方 second-post もページバンドルですが、ここにはページリソースがありません。 このバンドルから first-post に関連づけられたページリソースに直接アクセスすることはできません。

content
└── post
    ├── first-post
    │   ├── images
    │   │   ├── a.jpg
    │   │   ├── b.jpg
    │   │   └── c.jpg
    │   ├── index.md (ページバンドルのルート)
    │   ├── latest.html
    │   ├── manual.json
    │   ├── notice.md
    │   ├── office.mp3
    │   ├── pocket.mp4
    │   ├── rating.pdf
    │   └── safety.txt
    └── second-post
        └── index.md (ページバンドルのルート)

Examples

Use any of these methods on a Page object to capture page resources:

• Resources.ByType
• Resources.Get
• Resources.GetMatch
• Resources.Match

Once you have captured a resource, use any of the applicable Resource methods to return a value or perform an action.

The following examples assume this content structure:

content/
└── example/
    ├── data/
    │  └── books.json   <-- page resource
    ├── images/
    │  ├── a.jpg        <-- page resource
    │  └── b.jpg        <-- page resource
    ├── snippets/
    │  └── text.md      <-- page resource
    └── index.md

Render a single image, and throw an error if the file does not exist:

{{ $path := "images/a.jpg" }}
{{ with .Resources.Get $path }}
  <img src="{{ .RelPermalink }}" width="{{ .Width }}" height="{{ .Height }}" alt="">
{{ else }}
  {{ errorf "Unable to get page resource %q" $path }}
{{ end }}

Render all images, resized to 300 px wide:

{{ range .Resources.ByType "image" }}
  {{ with .Resize "300x" }}
    <img src="{{ .RelPermalink }}" width="{{ .Width }}" height="{{ .Height }}" alt="">
  {{ end }}
{{ end }}

Render the markdown snippet:

{{ with .Resources.Get "snippets/text.md" }}
  {{ .Content }}
{{ end }}

List the titles in the data file, and throw an error if the file does not exist.

{{ $path := "data/books.json" }}
{{ with .Resources.Get $path }}
  {{ with . | transform.Unmarshal }}
    <p>Books:</p>
    <ul>
      {{ range . }}
        <li>{{ .title }}</li>
      {{ end }}
    </ul>
  {{ end }}
{{ else }}
  {{ errorf "Unable to get page resource %q" $path }}
{{ end }}

Metadata

The page resources’ metadata is managed from the corresponding page’s front matter with an array/table parameter named resources. You can batch assign values using wildcards.

name

(string) Sets the value returned in Name.

title

(string) Sets the value returned in Title

params

(map) A map of custom key-value pairs.

Resources metadata example

---
date: "2018-01-25"
resources:
- name: header
  src: images/sunset.jpg
- params:
    icon: photo
  src: documents/photo_specs.pdf
  title: Photo Specifications
- src: documents/guide.pdf
  title: Instruction Guide
- src: documents/checklist.pdf
  title: Document Checklist
- src: documents/payment.docx
  title: Proof of Payment
- name: pdf-file-:counter
  params:
    icon: pdf
  src: '**.pdf'
- params:
    icon: word
  src: '**.docx'
title: Application
---

+++
date = '2018-01-25'
title = 'Application'
[[resources]]
  name = 'header'
  src = 'images/sunset.jpg'
[[resources]]
  src = 'documents/photo_specs.pdf'
  title = 'Photo Specifications'
  [resources.params]
    icon = 'photo'
[[resources]]
  src = 'documents/guide.pdf'
  title = 'Instruction Guide'
[[resources]]
  src = 'documents/checklist.pdf'
  title = 'Document Checklist'
[[resources]]
  src = 'documents/payment.docx'
  title = 'Proof of Payment'
[[resources]]
  name = 'pdf-file-:counter'
  src = '**.pdf'
  [resources.params]
    icon = 'pdf'
[[resources]]
  src = '**.docx'
  [resources.params]
    icon = 'word'
+++

{
   "date": "2018-01-25",
   "resources": [
      {
         "name": "header",
         "src": "images/sunset.jpg"
      },
      {
         "params": {
            "icon": "photo"
         },
         "src": "documents/photo_specs.pdf",
         "title": "Photo Specifications"
      },
      {
         "src": "documents/guide.pdf",
         "title": "Instruction Guide"
      },
      {
         "src": "documents/checklist.pdf",
         "title": "Document Checklist"
      },
      {
         "src": "documents/payment.docx",
         "title": "Proof of Payment"
      },
      {
         "name": "pdf-file-:counter",
         "params": {
            "icon": "pdf"
         },
         "src": "**.pdf"
      },
      {
         "params": {
            "icon": "word"
         },
         "src": "**.docx"
      }
   ],
   "title": "Application"
}

From the example above:

• sunset.jpg will receive a new Name and can now be found with .GetMatch "header".
• documents/photo_specs.pdf will get the photo icon.
• documents/checklist.pdf, documents/guide.pdf and documents/payment.docx will get Title as set by title.
• Every PDF in the bundle except documents/photo_specs.pdf will get the pdf icon.
• All PDF files will get a new Name. The name parameter contains a special placeholder :counter, so the Name will be pdf-file-1, pdf-file-2, pdf-file-3.
• Every docx in the bundle will receive the word icon.

The :counter placeholder in name and title

The :counter is a special placeholder recognized in name and title parameters resources.

The counter starts at 1 the first time they are used in either name or title.

For example, if a bundle has the resources photo_specs.pdf, other_specs.pdf, guide.pdf and checklist.pdf, and the front matter has specified the resources as:

---
resources:
- src: '*specs.pdf'
  title: 'Specification #:counter'
- name: pdf-file-:counter
  src: '**.pdf'
title: Engine inspections
---

+++
title = 'Engine inspections'
[[resources]]
  src = '*specs.pdf'
  title = 'Specification #:counter'
[[resources]]
  name = 'pdf-file-:counter'
  src = '**.pdf'
+++

{
   "resources": [
      {
         "src": "*specs.pdf",
         "title": "Specification #:counter"
      },
      {
         "name": "pdf-file-:counter",
         "src": "**.pdf"
      }
   ],
   "title": "Engine inspections"
}

the Name and Title will be assigned to the resource files as follows:

Multilingual

By default, with a multilingual single-host site, Hugo does not duplicate shared page resources when building the site.

Consider this site configuration:

defaultContentLanguage: de
defaultContentLanguageInSubdir: true
languages:
  de:
    languageCode: de-DE
    languageName: Deutsch
    weight: 1
  en:
    languageCode: en-US
    languageName: English
    weight: 2

defaultContentLanguage = 'de'
defaultContentLanguageInSubdir = true
[languages]
  [languages.de]
    languageCode = 'de-DE'
    languageName = 'Deutsch'
    weight = 1
  [languages.en]
    languageCode = 'en-US'
    languageName = 'English'
    weight = 2

{
   "defaultContentLanguage": "de",
   "defaultContentLanguageInSubdir": true,
   "languages": {
      "de": {
         "languageCode": "de-DE",
         "languageName": "Deutsch",
         "weight": 1
      },
      "en": {
         "languageCode": "en-US",
         "languageName": "English",
         "weight": 2
      }
   }
}

And this content:

content/
└── my-bundle/
    ├── a.jpg     <-- shared page resource
    ├── b.jpg     <-- shared page resource
    ├── c.de.jpg
    ├── c.en.jpg
    ├── index.de.md
    └── index.en.md

With v0.122.0 and earlier, Hugo duplicated the shared page resources, creating copies for each language:

public/
├── de/
│   ├── my-bundle/
│   │   ├── a.jpg     <-- shared page resource
│   │   ├── b.jpg     <-- shared page resource
│   │   ├── c.de.jpg
│   │   └── index.html
│   └── index.html
├── en/
│   ├── my-bundle/
│   │   ├── a.jpg     <-- shared page resource (duplicate)
│   │   ├── b.jpg     <-- shared page resource (duplicate)
│   │   ├── c.en.jpg
│   │   └── index.html
│   └── index.html
└── index.html

With v0.123.0 and later, Hugo places the shared resources in the page bundle for the default content language:

public/
├── de/
│   ├── my-bundle/
│   │   ├── a.jpg     <-- shared page resource
│   │   ├── b.jpg     <-- shared page resource
│   │   ├── c.de.jpg
│   │   └── index.html
│   └── index.html
├── en/
│   ├── my-bundle/
│   │   ├── c.en.jpg
│   │   └── index.html
│   └── index.html
└── index.html

This approach reduces build times, storage requirements, bandwidth consumption, and deployment times, ultimately reducing cost.

Although duplicating shared page resources is inefficient, you can enable this feature in your site configuration if desired:

markup:
  goldmark:
    duplicateResourceFiles: true

[markup]
  [markup.goldmark]
    duplicateResourceFiles = true

{
   "markup": {
      "goldmark": {
         "duplicateResourceFiles": true
      }
   }
}