added logic to check for excerpt

Author: Queen-codes

content/community/write-a-blog-post/contents.lr

@@ -54,6 +54,8 @@ Once you have written your post, you can either send it to us (Markdown is easie
   ---
   pub_date: Replace this text with the publication date in YYYY-MM-DD format.
   ---
+  excerpt: Replace this text with a short summary of your post. This is an optional, and you can leave it blank. 
+  ---
   body:
   Replace this text with your post's content (minus the title). This field accepts Markdown for formatting.
   If you're including images, you can use the Markdown image syntax i.e. ![image-title](image-file-name.jpg).

models/blog-post.ini

@@ -29,3 +29,8 @@ type = strings
 [fields.body]
 label = Body
 type = markdown
+
+[fields.excerpt]
+label = Excerpt
+type = text
+width = 1/2 

themes/vocabulary_theme/templates/macros/posts.html

@@ -9,7 +9,11 @@
         <h4 class="b-header"><a class="blog-title" href="{{ post|url }}">{{ post.title }}</a></h4>
         {{ render_authors_byline(post) }}
         <div class="excerpt">
-          {{ post.body | excerpt | string | striptags() | truncate(100) }}
+          {% if post.excerpt %}
+            {{ post.excerpt | string | striptags() }}
+          {% else %}
+            {{ post.body | excerpt | string | striptags() | truncate(100) }}
+          {% endif %}
         </div>
       </div>
     </article>