collections.Sort

collections.Sort COLLECTION [KEY] [ORDER]

any

sort

The KEY is optional when sorting slices in ascending order, otherwise it is required. When sorting slices, use the literal value in place of the KEY. See examples below.

The ORDER may be either asc (ascending) or desc (descending). The default sort order is ascending.

Sort a slice

The examples below assume this site configuration:

params:
  grades:
  - b
  - a
  - c

[params]
  grades = ['b', 'a', 'c']

{
   "params": {
      "grades": [
         "b",
         "a",
         "c"
      ]
   }
}

Ascending order

Sort slice elements in ascending order using either of these constructs:

{{ sort site.Params.grades }} → [a b c]
{{ sort site.Params.grades "value" "asc" }} → [a b c]

In the examples above, value is the KEY representing the value of the slice element.

Descending order

Sort slice elements in descending order:

{{ sort site.Params.grades "value" "desc" }} → [c b a]

In the example above, value is the KEY representing the value of the slice element.

Sort a map

The examples below assume this site configuration:

params:
  authors:
    a:
      firstName: Marius
      lastName: Pontmercy
    b:
      firstName: Victor
      lastName: Hugo
    c:
      firstName: Jean
      lastName: Valjean

[params]
  [params.authors]
    [params.authors.a]
      firstName = 'Marius'
      lastName = 'Pontmercy'
    [params.authors.b]
      firstName = 'Victor'
      lastName = 'Hugo'
    [params.authors.c]
      firstName = 'Jean'
      lastName = 'Valjean'

{
   "params": {
      "authors": {
         "a": {
            "firstName": "Marius",
            "lastName": "Pontmercy"
         },
         "b": {
            "firstName": "Victor",
            "lastName": "Hugo"
         },
         "c": {
            "firstName": "Jean",
            "lastName": "Valjean"
         }
      }
   }
}

Ascending order

Sort map objects in ascending order using either of these constructs:

{{ range sort site.Params.authors "firstname" }}
  {{ .firstName }}
{{ end }}

{{ range sort site.Params.authors "firstname" "asc" }}
  {{ .firstName }}
{{ end }}

These produce:

Jean Marius Victor

Descending order

Sort map objects in descending order:

{{ range sort site.Params.authors "firstname" "desc" }}
  {{ .firstName }}
{{ end }}

This produces:

Victor Marius Jean

First level key removal

Hugo removes the first level keys when sorting a map.

Original map:

{
  "felix": {
    "breed": "malicious",
    "type": "cat"
  },
  "spot": {
    "breed": "boxer",
    "type": "dog"
  }
}

After sorting:

[
  {
    "breed": "malicious",
    "type": "cat"
  },
  {
    "breed": "boxer",
    "type": "dog"
  }
]

Sort a page collection

In this contrived example, sort the site’s regular pages by .Type in descending order:

{{ range sort site.RegularPages "Type" "desc" }}
  <h2><a href="{{ .RelPermalink }}">{{ .LinkTitle }}</a></h2>
{{ end }}