use symbol instead of proc.

Author: seuros

app/controllers/comments_controller.rb

@@ -25,14 +25,14 @@ def create
       @comment.user_email = current_user.email
       @comment.user_agent = request.user_agent
       @comment.user_ip = request.remote_ip
-      @comment.request_format = request.format
+      @comment.request_format = request.format.to_s
 
       if @comment.save
         record_event('created comment')
-        format.html { redirect_to protip_path(@comment.commentable.try(:public_id)) }
+        format.html { redirect_to protip_path(@comment.commentable) }
         format.json { render json: @comment, status: :created, location: @comment }
       else
-        format.html { redirect_to protip_path(@comment.commentable.try(:public_id)), error: "could not add your comment. try again" }
+        format.html { redirect_to protip_path(@comment.commentable), error: "could not add your comment. try again" }
         format.json { render json: @comment.errors, status: :unprocessable_entity }
       end
     end

app/models/comment.rb

@@ -33,12 +33,12 @@ class Comment < ActiveRecord::Base
   alias_method :author, :user
   alias_attribute :body, :comment
 
-  rakismet_attrs  author: -> { self.user_name },
-    author_email: -> { self.user_email },
-    content: :comment,
-    blog: ENV['AKISMET_URL'],
-    user_ip: -> { self.remote_ip },
-    user_agent: -> { self.user_agent }
+  rakismet_attrs author: :user_name,
+                 author_email: :user_email,
+                 content: :comment,
+                 blog: ENV['AKISMET_URL'],
+                 user_ip: :remote_ip,
+                 user_agent: :user_agent
 
   validates :comment, length: { minimum: 2 }