hugo/docs/content/en/content-management/page-resources.md
2021-12-08 08:54:25 +01:00

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Page Resources Page resources -- images, other pages, documents, etc. -- have page-relative URLs and their own metadata. 2018-01-24
content management
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content
resources
4003 false true Page Resources
docs
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content-management 31

Page resources are only accessible from [page bundles]({{< relref "/content-management/page-bundles" >}}), those directories with index.md or _index.md files at their root. Page resources are only available to the page with which they are bundled.

In this example, first-post is a page bundle with access to 10 page resources including audio, data, documents, images, and video. Although second-post is also a page bundle, it has no page resources and is unable to directly access the page resources associated with first-post.

content
└── post
    ├── first-post
    │   ├── images
    │   │   ├── a.jpg
    │   │   ├── b.jpg
    │   │   └── c.jpg
    │   ├── index.md (root of page bundle)
    │   ├── latest.html
    │   ├── manual.json
    │   ├── notice.md
    │   ├── office.mp3
    │   ├── pocket.mp4
    │   ├── rating.pdf
    │   └── safety.txt
    └── second-post
        └── index.md (root of page bundle)

Properties

ResourceType
The main type of the resource's Media Type. For example, a file of MIME type image/jpeg has the ResourceType image. A Page will have ResourceType with value page.

{{< new-in "0.80.0" >}} Note that we in Hugo v0.80.0 fixed a bug where non-image resources (e.g. video) would return the MIME sub type, e.g. json.

Name
Default value is the filename (relative to the owning page). Can be set in front matter.
Title
Default value is the same as .Name. Can be set in front matter.
Permalink
The absolute URL to the resource. Resources of type page will have no value.
RelPermalink
The relative URL to the resource. Resources of type page will have no value.
Content
The content of the resource itself. For most resources, this returns a string with the contents of the file. Use this to create inline resources.
{{ with .Resources.GetMatch "script.js" }}
  <script>{{ .Content | safeJS }}</script>
{{ end }}

{{ with .Resources.GetMatch "style.css" }}
  <style>{{ .Content | safeCSS }}</style>
{{ end }}

{{ with .Resources.GetMatch "img.png" }}
  <img src="data:{{ .MediaType }};base64,{{ .Content | base64Encode }}">
{{ end }}
MediaType
The MIME type of the resource, such as image/jpeg.
MediaType.MainType
The main type of the resource's MIME type. For example, a file of MIME type application/pdf has for MainType application.
MediaType.SubType
The subtype of the resource's MIME type. For example, a file of MIME type application/pdf has for SubType pdf. Note that this is not the same as the file extension - PowerPoint files have a subtype of vnd.mspowerpoint.
MediaType.Suffixes
A slice of possible suffixes for the resource's MIME type.

Methods

ByType
Returns the page resources of the given type.
{{ .Resources.ByType "image" }}
Match
Returns all the page resources (as a slice) whose Name matches the given Glob pattern (examples). The matching is case-insensitive.
{{ .Resources.Match "images/*" }}
GetMatch
Same as Match but will return the first match.

Pattern Matching

// Using Match/GetMatch to find this images/sunset.jpg ?
.Resources.Match "images/sun*" 
.Resources.Match "**/sunset.jpg" 
.Resources.Match "images/*.jpg" 
.Resources.Match "**.jpg" 
.Resources.Match "*" 🚫
.Resources.Match "sunset.jpg" 🚫
.Resources.Match "*sunset.jpg" 🚫

Page Resources 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.

{{% note %}} Resources of type page get Title etc. from their own front matter. {{% /note %}}

name
Sets the value returned in Name.

{{% warning %}} The methods Match and GetMatch use Name to match the resources. {{%/ warning %}}

title
Sets the value returned in Title
params
A map of custom key/values.

Resources metadata example

{{< code-toggle copy="false">}} title: Application date : 2018-01-25 resources :

  • src : "images/sunset.jpg" name : "header"
  • src : "documents/photo_specs.pdf" title : "Photo Specifications" params: icon : "photo"
  • src : "documents/guide.pdf" title : "Instruction Guide"
  • src : "documents/checklist.pdf" title : "Document Checklist"
  • src : "documents/payment.docx" title : "Proof of Payment"
  • src : "**.pdf" name : "pdf-file-:counter" params : icon : "pdf"
  • src : "**.docx" params : icon : "word" {{</ code-toggle >}}

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.

{{% warning %}} The order matters --- Only the first set values of the title, name and params-keys will be used. Consecutive parameters will be set only for the ones not already set. In the above example, .Params.icon is first set to "photo" in src = "documents/photo_specs.pdf". So that would not get overridden to "pdf" by the later set src = "**.pdf" rule. {{%/ warning %}}

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:

{{< code-toggle copy="false">}} resources src = "*specs.pdf" title = "Specification #:counter" resources src = "**.pdf" name = "pdf-file-:counter" {{</ code-toggle >}}

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

Resource file Name Title
checklist.pdf "pdf-file-1.pdf "checklist.pdf"
guide.pdf "pdf-file-2.pdf "guide.pdf"
other_specs.pdf "pdf-file-3.pdf "Specification #1"
photo_specs.pdf "pdf-file-4.pdf "Specification #2"