Rails：找不到带有'id'= autocomplete_tag_name的帖子

Question

Using acts-as-taggable-on and rails4-autocomplete to autocomplete tags. Here is my code.

routes.rb

  get 'tags/:tag', to: 'posts#index', as: :tag

  resources :posts do
    get :autocomplete_tag_name, :on => :collection
  end

posts_controller.rb

autocomplete :tag, :name

application.js

//= require jquery
//= require jquery_ujs
//= require jquery-ui
//= require autocomplete-rails

_form.html.haml

= f.input :tag_list, :url => autocomplete_tag_name_posts_path, :as => :autocomplete

When I start typing, I can see the request to the server but return (404) Not Found as

http://localhost:3000/posts/autocomplete_tag_name?term=rails

Firefox DevTool Network

ActiveRecord::RecordNotFound at /posts/autocomplete_tag_name
============================================================

> Couldn't find Post with 'id'=autocomplete_tag_name

app/controllers/posts_controller.rb, line 133
---------------------------------------------

``` ruby
  128     end
  129   
  130     private
  131       # Use callbacks to share common setup or constraints between actions.
  132       def set_post
> 133         @post = Post.find(params[:id])
  134       end
  135   
  136       # Never trust parameters from the scary internet, only allow the white list through.
  137       def post_params
  138         params.require(:post).permit(:title, :body, :image, :tag_list)

It couldn't find a post with id autocomplete_tag_name which it shouldn't be like this.

If I hard coded the request to

http://localhost:3000/tags/autocomplete_tag_name?term=rails

It returns 200 (ok)

Answer 1

I think this is a routing error. Looking at the hard coded link, it is working at localhost:3000/tags/ , but your 404 error is looking for localhost:3000/posts/ . Have a look at the answer on this post, its for Rails3 but it may be of some use: How to add tagging with autocomplete to an existing model in Rails?