Rails no route matches

Question

Thanks guys. I've solved the problem. It's because when I enter the `posts/new` page. The new action creates a dummy `@post` with nil attributes. Since the `@post` exists, the edit & delete link in the sidebar appears. However, the `edit_post_path` doesn't work because the `@post.id` is `nil`. Then the error occurs. So I just changed `<% if @post %>` to `<% if @post && !@post.id.nil? %>` and it works. -- p.s. The rails error message is quite confusing. I'm new to rails and just built a simple app and saw the error when I click a link to create a new post: `No route matches {:action=>"edit", :controller=>"posts"}` The `rake routes` result: ``` posts GET /posts(.:format) posts#index POST /posts(.:format) posts#create new_post GET /posts/new(.:format) posts#new edit_post GET /posts/:id/edit(.:format) posts#edit post GET /posts/:id(.:format) posts#show PUT /posts/:id(.:format) posts#update DELETE /posts/:id(.:format) posts#destroy ``` The routes.rb file has `resources :posts` in it. The l…

Accepted Answer

You are probably using `edit_post_path` in your `new.html.erb` for posts. It is complaining about `no route matches` as you haven't passed id of the edit post. But that shouldn't be in `new` view in the first place, so you probably need to delete that line - for editing post

Rails no route matches

Solution

Problem