所以我搜索了这个并且大多数人都遇到了这个错误,因为他们在他们的Class中间有他们的私有方法,或者他们在db中有nil属性的记录。就目前而言,我在数据库中只有一条记录,我将在下面显示。尝试访问我正在创建的索引页时出现此错误。
控制器:
class AnthologiesController < ApplicationController
before_action :authenticate_user!, :except => [:show, :index]
def index
@anthologies = Anthology.all
end
def show
@anthology = Anthology.find(params[:id])
end
def new
@anthology = Anthology.new
end
def create
@anthology = Anthology.new(anthology_params)
@anthology.user = current_user
if @anthology.save
redirect_to @anthology, notice: "Success! Your anthology was created."
else
render 'new'
end
end
private
def anthology_params
params.require(:anthology).permit(:title, :description)
end
end
查看:
<h1>Anthologies</h1>
<ul>
<%= @anthologies.each do |anthology| %>
<li><%= @anthology.title %></li>
<li><%= @anthology.description %></li>
<li><%= @anthology.username %></li>
<% end %>
</ul>
db中的一条记录:
#<Anthology id: 1, title: "Writing More Better", description: "This is me teaching you writing and suchwhat.", created_at: "2015-11-26 15:57:40", updated_at: "2015-11-26 15:57:40", user_id: 1>
任何帮助都会令人惊讶,并提前感谢。
答案 0 :(得分:3)
在each
循环中,您指的是@anthology
,而不是您声明的块变量。
<h1>Anthologies</h1>
<ul>
<%= @anthologies.each do |anthology| %>
<li><%= anthology.title %></li>
<li><%= anthology.description %></li>
<li><%= anthology.username %></li>
<% end %>
</ul>
答案 1 :(得分:0)
即使你也可以试试这个:
kill `ps -ef | grep 'java Client' | grep -v grep | awk '{print $3}'`