#399

backend/app/representations/post_repr.rb

@@ -69,7 +69,12 @@ module PostRepr
     return nil unless post.thumbnail.attached?
 
     Rails.application.routes.url_helpers.rails_blob_url(post.thumbnail, only_path: false)
-  rescue
+  rescue ActionController::UrlGenerationError, ArgumentError, URI::InvalidURIError => e
+    Rails.logger.warn(
+        "PostRepr.thumbnail_url failed post_id=#{post.id} " \
+        "attachment_id=#{post.thumbnail.attachment&.id} " \
+        "blob_id=#{post.thumbnail.blob&.id} " \
+        "error_class=#{e.class} message=#{e.message}")
     nil
   end
 end

backend/config/environments/development.rb

@@ -36,7 +36,11 @@ Rails.application.configure do
   config.action_mailer.perform_caching = false
 
   # Set localhost to be used by links generated in mailer templates.
-  config.action_mailer.default_url_options = { host: "localhost", port: 3000 }
+  config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }
+  Rails.application.routes.default_url_options.merge!(
+      host: 'localhost',
+      port: 3002,
+      protocol: 'http')
 
   # Print deprecation notices to the Rails logger.
   config.active_support.deprecation = :log