Ruby入门指南:未初始化的常量PostsController ::帖子

Question

我已经完成了ruby入门指南几次,我总是得到相同的结果. 的GUID

NameError in PostsController#index
 uninitialized constant PostsController::Posts

提取的来源(第21行):

19
20
21
22
23
24

---

def index
    @posts = Posts.all
end

def edit

Rails.root: C:/RailsTesting/blog

应用程序跟踪| 框架跟踪| 完全跟踪app/controllers/posts_controller.rb:21:在`index'请求中

出于沮丧/绝望,我从教程提供的实际代码中复制了所有文件但没有用,请帮忙.

这是我的 index

<h1>Hello, Rails!</h1>
<%= link_to "My Blog", controller: "posts" %>

<%= link_to 'New post', new_post_path %>


<table>
<tr>
<th>Title</th>
<th>Text</th>
<th></th>
<th></th>
</tr>

<% @posts.each do |post| %>
<tr>
<td><%= post.title %></td>
<td><%= post.text %></td>
<td><%= link_to 'Show', post %></td>
<td><%= link_to 'Edit', edit_post_path(post) %></td>
<td><%= link_to 'Destroy', post_path(post),
                method: :delete, data: { confirm: 'Are you sure?' } %>
</tr>

...

这是我的 posts_controller

class PostsController < ApplicationController
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

def index
    @posts = Posts.all
end

def edit
    @post = Post.find(params[:id])
end

def update
    @post = Post.find(params[:id])

    if @post.update(params[:post].permit(:title, :text))
        redirect_to @post
    else
        render 'edit'
    end
end

def destroy
    @post = Post.find(params[:id])
    @post.destroy

    redirect_to posts_path
end

private
    def post_params
        params.require(:post).permit(:title, :text)
    end

  end

Answer 1

您的index方法具有Post以复数形式编写的类.将其更改为Post.all