update theme

layouts/_default/single.html

@@ -23,14 +23,19 @@
         {{ end }}
 
         {{ if .Site.Params.showRelatedPosts }}
-          {{ $related := .Site.RegularPages.Related . | first 3 }}
+          {{ range first 1 (where (where .Site.Pages ".Params.tags" "intersect" .Params.tags) "Permalink" "!=" .Permalink) }}
-          {{ with $related }}
+            {{ $.Scratch.Set "has_related" true }}
+          {{ end }}
+
+          {{ if $.Scratch.Get "has_related" }}
                   <h4 class="see-also">{{ i18n "seeAlso" }}</h4>
                   <ul>
-          {{ range . }}
+                {{ $num_to_show := .Site.Params.related_content_limit | default 5 }}
+                {{ range first $num_to_show (where (where .Site.Pages ".Params.tags" "intersect" .Params.tags) "Permalink" "!=" .Permalink) }}
                     <li><a href="{{ .RelPermalink }}">{{ .Title }}</a></li>
                 {{ end }}
               </ul>
+
           {{ end }}
         {{ end }}
       </article>
@@ -50,6 +55,7 @@
         </ul>
       {{ end }}
 
+
       {{ if (.Params.comments) | or (and (or (not (isset .Params "comments")) (eq .Params.comments nil)) (and .Site.Params.comments (ne .Type "page"))) }}
 	    {{ partial "remark42.html" . }}
         {{ if .Site.DisqusShortname }}