Use a new authors array instead of a string

archetypes/blog/index.md

@@ -2,11 +2,13 @@
 
 title: {{ replace .Name "-" " " | title }}
 date: {{ .Date | time.Format "2006-01-02" }}
-author: {{ with .Site.Author.name }}{{ . }}{{ else }}John Doe{{ end }}
 toc: true
 comments: true
 draft: true
 
+authors:
+  - {{ with .Site.Author.name }}{{ . }}{{ else }}John Doe{{ end }}
+
 tags:
   - awesome
 

archetypes/default/index.md

@@ -1,11 +1,13 @@
 ---
 
 title: {{ replace .Name "-" " " | title }}
-author: {{ with .Site.Author.name }}{{ . }}{{ else }}John Doe{{ end }}
 menu: main
 toc: true
 comments: false
 
+authors:
+  - {{ with .Site.Author.name }}{{ . }}{{ else }}John Doe{{ end }}
+
 ---
 
 This page is about something. All the content before the "more" HTML comment

layouts/partials/post-metadata.html

@@ -20,7 +20,17 @@
     {{ end }}
     {{ end }}
 
+    {{ $authorString := "" }}
+
+    {{ with .Params.authors }}
+    {{ $authorString = delimit . ", " }}
+    {{ else }}
     {{ with .Params.author }}
+    {{ $authorString = . }}
+    {{ end }}
+    {{ end }}
+
+    {{ with $authorString }}
     <span class="post-meta-item">
         {{ partial "icon.html" "user-circle" }}
         {{ . }}