Save syndication sources to posts

app/repos/post_repo.rb

@@ -1,7 +1,7 @@
 module Adamantium
   module Repos
     class PostRepo < Adamantium::Repo[:posts]
-      commands :update
+      commands update: :by_pk
 
       def create(post_attrs)
         posts.transaction do
@@ -64,6 +64,12 @@ module Adamantium
           .one!
       end
 
+      def find!(id)
+        posts
+          .by_pk(id)
+          .one!
+      end
+
       def slug_exists?(slug)
         !!posts
           .where(slug: slug)