Outputting an alphabetical list of category posts

support
1

Hello,

I’ve studied the docs and tried trail-and-error but remain stuck. Does someone know how to output a list of post from a specific category, ordered alphabetically?

Some things I’ve tried so far:

{{ range where $.Data.Pages $.Params.categories "example category" }}
    {{ .Render "li" }}
{{ end }}

{{ range where .Data.Pages .Params.category "example-category" }}
    {{ .Render "li" }}
{{ end }}

{{ range where $.Data.Pages $.Site.Taxonomies.categories "example-category" }}
    {{ .Render "li" }}
{{ end }}

<ul>
{{ range .Site.Pages (where "categories" "example-category" )}}
  <li>{{ .Title }}</li>
{{ end }}
</ul>

<ul>
{{ range where .Data.Pages ".Params.categories" "example-category" }}
  <li>{{ .Title }}</li>
{{ end }}
</ul>

<ul>
{{ range .Site.Pages (where .Site.Taxonomies.categories "example-category") }}
  <li>{{ .Title }}</li>
{{ end }}
</ul>
2

I got it partially working, this returns a list of all posts from a specific (sub)category:

{{ range .Site.Taxonomies.categories.categoryname }}
  {{ if in .Page.Params.categories "Example category" }}
    <li>Here's are the category posts: {{ .Page.Title }}</li>
  {{ end }}
{{ end }}

The sorting is still where I’m stuck, this is how I approached that:

<!-- Get all posts from the category -->
{{ range .Site.Taxonomies.categories.categoryname }}
  <!-- Sort them -->
  {{ range sort .Page "Title" }}
    <!-- Then only posts from the subcategory -->
    {{ if in .Page.Params.categories "Example category"}}
      <li>Sorted test: {{ .Page.Title }}</li>
    {{ end }}
  {{ end }}
{{ end }}

That gave me an error of

Error while rendering section *sectionname*: reflect: call of reflect.Value.Len on struct Value

I guess that’s from the Go reflect package. That suggests I need to use a Array, Chan, Map, Slice, or String somewhere. I just don’t know how or where.

Anyone got a suggestion? :slight_smile:

4

I got it working quickly once I turned the problem around and didn’t use .Site.Taxonomies.categories.categoryname but first $.Site.Pages.ByTitle and only after that the filtering by categories.

This generates an alphabetically list of pages that belong to the “First category” and the “Second category” categories:

{{ range $.Site.Pages.ByTitle }}
  {{ if and (in .Params.categories "First category") (in .Params.categories "Second category") }}
    <li>{{ .Title }}</li>
  {{ end }}
{{ end }}
5

For people who find this topic through the search: the ‘solution’ I found is not a real solution but has a strong negative impact on the performance of Hugo. See this topic for more.