Question

我在heroku服务器上遇到了一些麻烦。没有在本地遇到这个问题：

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'

我的控制器：

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

我刚刚添加了authorname

rails g migration add_authorname_to_chapter authorname:string

我错过了什么？

编辑，添加架构信息： ActiveRecord :: Schema.define（版本：20140723154333）做

  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

迁移后重新启动服务器将刷新架构缓存。

Answer 2

对于重启不起作用的情况，我还可以通过转储模式解决此问题：

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Matchit{

   public static void main(String []args){
      String str = "process_abc_pqr_client_123_Tree";
      Pattern p = Pattern.compile("process_abc_pqr_client_(.*)|process_client_(.*)");
      Matcher m = p.matcher("process_abc_pqr_client_123_Tree");
      if (m.find( )) {
            System.out.println("Found value: " + m.group(1) );
      }
   }
}

ActiveRecord :: UnknownAttributeError（未知属性：authorname）：

2 个答案: