fix: handle empty/undefined images in feeds

feed-json.njk

@@ -25,7 +25,7 @@ eleventyExcludeFromCollections: true
       "title": {{ post.data.title | default(post.content | striptags | truncate(80)) | jsonEncode | safe }},
       "content_html": {{ post.content | htmlToAbsoluteUrls(absolutePostUrl) | jsonEncode | safe }},
       "date_published": "{{ post.date | dateToRfc3339 }}"
-      {%- if postImage %},
+      {%- if postImage and postImage != "" %},
       "image": "{{ postImage | url | absoluteUrl(site.url) }}"
       {%- endif %}
     }{% if not loop.last %},{% endif %}

feed.njk

@@ -20,7 +20,7 @@ eleventyExcludeFromCollections: true
       <guid isPermaLink="true">{{ absolutePostUrl }}</guid>
       <pubDate>{{ post.date | dateToRfc822 }}</pubDate>
       <description>{{ post.content | htmlToAbsoluteUrls(absolutePostUrl) | escape }}</description>
-      {%- if postImage %}
+      {%- if postImage and postImage != "" %}
       {%- set imageUrl = postImage | url | absoluteUrl(site.url) %}
       <enclosure url="{{ imageUrl }}" type="image/jpeg" length="0"/>
       <media:content url="{{ imageUrl }}" medium="image"/>