Rails Mongoid「undefined method`[]'for nil：NilClass」on controller index and create

我剛剛開始使用Mongoid for Rails，並對其進行了截屏。我生成了一個腳手架，生成了mongoid.yml，並且只更改了數據庫名稱。我也遵循了在他們的文檔中準備mongoid for rails的步驟。Rails Mongoid「undefined method`[]'for nil：NilClass」on controller index and create

但是，我似乎總是在創建行動

undefined method `[]' for nil:NilClass 

Rails.root: /Users/ygamayatmiretuta/Documents/Dev/ruby/ta 
Application Trace | Framework Trace | Full Trace 

app/controllers/notes_controller.rb:25:in `create'

而這一次的索引動作來得到這個：

undefined method `[]' for nil:NilClass 

Extracted source (around line #12): 

9:  <th></th> 
10: </tr> 
11: 
12: <% @notes.each do |note| %> 
13: <tr> 
14:  <td><%= note.title %></td> 
15:  <td><%= note.description %></td>

我缺少一個配置步驟還是什麼？謝謝！

這是控制器：

class NotesController < ApplicationController 
    respond_to :html 

    def index 
    @notes = Note.all.entries 
    respond_with @notes 
    end 

    def show 
    @notes = Note.find params[:id] 
    respond_with @notes 
    end 

    def new 
    @notes = Note.new 
    respond_with @notes 
    end 

    def edit 
    @notes = Note.find params[:id] 
    respond_with @notes 
    end 

    def create 
    @notes = Note.create params[:notes] 
    respond_with @notes 
    end 

    def update 
    @notes = Note.find params[:id] 
    @notes.update_attributes params[:notes] 
    respond_with @notes 
    end 

    def destroy 
    @notes = Note.find params[:id] 
    @notes.destroy 
    respond_with @notes 
    end 
end

來源

2013-02-14 yretuta

什麼是你遵循的步驟？你能發佈完整跟蹤嗎？ – 2013-02-14 11:19:38