Ruby on Rails noob在这里参加了RoR.org上的入门教程.我在“5.11添加一些验证”部分,并在尝试刷新/ posts / new页面时抛出错误：
错误消息：
NoMethodError in PostsController#new
undefined method ` validates' for #<Class:0x0000000414fab0>
Extracted source (around line #2):
1 class Post < ActiveRecord::Base
2 validates :title,presence: true,3 length: { minimum: 5 }
4 end
我的帖子.rb：
class Post < ActiveRecord::Base
validates :title,length: { minimum: 5 }
end
我的posts_controller.rb：
class PostsController < ApplicationController
def index
@posts = Post.all
end
def new
@post = Post.new
end
def create
@post = Post.new(params[:post].permit(:title,:text))
if @post.save
redirect_to @post
else
render 'new'
end
end
def show
@post = Post.find(params[:id])
end
private
def post_params
params.require(:post).permit(:title,:text)
end
end
Sidenote – FWIW,在尝试诊断时,我从posts_controller.rb中删除了@ post = Post.new,并在刷新时出现此错误：
undefined method `errors' for nil:NilClass
Extracted source (around line #3):
<h1>New Post</h1>
<%= form_for :post,url: posts_path do |f| %>
<% if @post.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@post.errors.count,"error") %> prohibited this post from being saved:</h2>
<ul>
找不到new.html.erb部分的任何问题,所以我转向社区寻求指导.谁知道我哪里出错了？在此先感谢您的帮助.