Rails：找不到带有'id'= index的帖子

Question

So in my post controller, I have

def index
    @post = Post.all.order('created_at DESC')
end

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



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

and in my .erb file

 <% @post.each do |post| %>
            <h2 class="post_wrapper">
                <h2 class="title"><%= link_to post.title, post %></h2>
                <p class="date"><%= post.created_at.strftime("%B, %d, %Y")</p>
        <% end %>

The link is supposed to be picking up the 6 in /posts/6, but I suppose it isnt.

Edit: Here is my routes.rb

Rails.application.routes.draw do
     resources :posts
     root "index#index"
end

Answer 1

To visit your index route, you shouldn't be going to /posts/index rather /posts .

The error is likely occurring because

GET /posts/index would map to /posts/:id , which would be calling the show action of your posts_controller.

Run rake routes to see the route mappings of your application

Sidenote: I don't think your variable nomenclature is the best. If you have a collection of objects, I think it makes sense to call them @posts , to avoid confusions, while a single instance could be called @post

Answer 2

I'm sorry for the wrong answer: <%= link_to post.title, post_path(post) %> .

I check, and it work. This usage is not the problem. I doubt that if you keep visit /posts/index ? If so, just don't, visit /posts and click the link. If it's link_to method that generate the wrong url, please post the html that it generate.

Answer 3

You called the Url wrong so it is taking '/posts/index'. Add a path to tell the action where to go, observe the post_path(post)

<% @post.each do |post| %>
    <h2 class="post_wrapper">
    <h2 class="title"><%= link_to post.title, post_path(post) %></h2>
    <p class="date"><%= post.created_at.strftime("%B, %d, %Y")</p>
<% end %>

Check these routes for more info, You can send an oject in place of id too, so post_path(post) sends you to post detail page

HTTPVerb    Path            Controller#Action   Named Helper
GET         /posts           posts#index        posts_path
GET         /posts/new       posts#new      new_post_path
POST        /posts           posts#create       posts_path
GET         /posts/:id       posts#show     post_path(:id)
GET         /posts/:id/edit posts#edit      edit_post_path(:id)
PATCH/PUT   /posts/:id       posts#update   post_path(:id)
DELETE      /posts/:id       posts#destroy  post_path(:id)