ActiveRecord :: UnknownAttributeError (unknown attribute: username):

Question

I have problems with my hero server. No problem occurs locally:

2014-07-23T16:59:23.249055+00:00 app[web.1]: ActiveRecord::UnknownAttributeError (unknown attribute: authorname):
2014-07-23T16:59:23.249058+00:00 app[web.1]:   app/controllers/chapters_controller.rb:5:in `create'

My controller:

class ChaptersController < ApplicationController

    def create
        @story = Story.find(params[:story_id])
        @chapter = @story.chapters.create(chapter_params)
        redirect_to story_path(@story)
    end

    def destroy
        @story = Story.find(params[:story_id])
        @chapter = @story.chapters.find(params[:id])
        @chapter.destroy
        redirect_to story_path(@story)
    end

    def upvote
        @chapter = Chapter.find(params[:id])
        @chapter.votes.create
        redirect_to(:back)
    end

    private
        def chapter_params
            params.require(:chapter).permit(:round, :author, :authorname, :body)
        end
end

I just added the author name with

rails g migration add_authorname_to_chapter authorname:string

What am I missing?

Edit by adding schema information: ActiveRecord :: Schema.define (version: 20140723154333) do

  create_table "chapters", force: true do |t|
    t.string   "round"
    t.string   "author"
    t.text     "body"
    t.integer  "story_id"
    t.datetime "created_at"
    t.datetime "updated_at"
    t.string   "authorname"
  end

Answer 1

Restarting the server after migration will update the schema cache.

Answer 2

In case the reboot does not work, I was able to solve this problem by also resetting the circuit:

heroku run rake db:schema:dump
heroku restart