IsAncestor
Syntax
Returns
{{__hugo_ctx pid=833}}
A section is a top-level content directory or any content directory containing an _index.md file.
With this content structure:
content/
├── auctions/
│ ├── 2023-11/
│ │ ├── _index.md
│ │ ├── auction-1.md
│ │ └── auction-2.md
│ ├── 2023-12/
│ │ ├── _index.md
│ │ ├── auction-3.md
│ │ └── auction-4.md
│ ├── _index.md
│ ├── bidding.md
│ └── payment.md
└── _index.md
When rendering the “auctions” page:
{{ with .Site.GetPage "/" }}
{{ $.IsAncestor . }} → false
{{ end }}
{{ with .Site.GetPage "/auctions" }}
{{ $.IsAncestor . }} → false
{{ end }}
{{ with .Site.GetPage "/auctions/2023-11" }}
{{ $.IsAncestor . }} → true
{{ end }}
{{ with .Site.GetPage "/auctions/2023-11/auction-2" }}
{{ $.IsAncestor . }} → true
{{ end }}
In the examples above we are coding defensively using the
with statement, returning nothing if the page does not exist. By adding an
else clause we can do some error reporting:
{{ $path := "/auctions/2023-11" }}
{{ with .Site.GetPage $path }}
{{ $.IsAncestor . }} → true
{{ else }}
{{ errorf "Unable to find the section with path %s" $path }}
{{ end }}
Understanding context
Inside of the with block, the
context (the dot) is the section Page object, not the Page object passed into the template. If we were to use this syntax:
{{ with .Site.GetPage "/auctions" }}
{{ .IsAncestor . }} → true
{{ end }}
The result would be wrong when rendering the “auction-1” page because we are comparing the section page to itself.
Use the $ to get the context passed into the template.
{{ with .Site.GetPage "/auctions" }}
{{ $.IsAncestor . }} → true
{{ end }}
Gaining a thorough understanding of context is critical for anyone writing template code.