找不到带有“ id” =的帖子

Question

I'm trying to link to a page that will show top responses for each post, however when I set everything up and click on the link_to button I get the error message:

ActiveRecord::RecordNotFound (Couldn't find Post with 'id'=):

I have this in my views:

  <% if @post.user == current_user && @post.responses.where(top: true).size >= 1 %>
      <a href="#" class="btt"><%= link_to "finalize top", '/top' %>Finalize Top</a>

And I have my /top route set to show the top responses page:

get '/top' => 'responses#top'

I understand that Rails doesn't know which post I'm referring to, but I'm not sure what needs to change in the views, routes, or responses controller.

I also have this in the responses controller which I thought would help but didn't:

def top
  @post = Post.find(params[:post_id])
end

Any help is highly appreciated! This is my first time posting and am completely new to Ruby on Rails and programming.

Here is the full error from Terminal:

Started GET "/top" for ::1 at 2017-01-21 21:17:03 -0500
Processing by ResponsesController#top as HTML
  Post Load (0.1ms)  SELECT  "posts".* FROM "posts" WHERE "posts"."id" = ? LIMIT 1  [["id", nil]]
Completed 404 Not Found in 2ms (ActiveRecord: 0.1ms)

ActiveRecord::RecordNotFound (Couldn't find Post with 'id'=):
  app/controllers/responses_controller.rb:46:in `set_post'

Answer 1

I would try:

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

Answer 2

First link_to is similar to <a> so in your view, you should putting link_to inside an <a> is like putting an <a> inside another <a> . In your view put:

<% if @post.user == current_user && @post.responses.where(top: true).size >= 1 %>
      <%= link_to "finalize top", { controller: :responses, action: :top, id: @post.id },{ class: 'btn btn-default'} %>

In your controller:

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

In routes.rb

get '/top' => 'responses#top'