使用嵌套资源#rails创建一个新对象

Question

I have a rails application that creates a notebook and within the notebook, notes. I am writing a form to create a new note but I am confused how to the format the form. This is what I currently have:

notebook/id/note/new -> view

= form_for [@notebook, @note] do |note|
  == note.label :title
  == note.text_field :title
  br
  == note.text_field :body
  br
  == note.submit :save

NotesController ->

  def new
    @note = Note.new
  end


 def create
    @note = @notebook.notes.create(notes_params)
    @note.user = current_user
    redirect_to @notebook
 end

  my routes: 
     resources :notebooks  do
       resources :notes 
     end

The error I am receiving says

 undefined method `notes_path' for #objectnumber

Answer 1

Since notes is a nested resource under notebooks , the form_for method needs a little help with the url. It's trying to create a path from the note passed into the block, but you need to specify that the url is nested, like so:

= form_for [@notebook, @note], url: notebook_note_path(@notebook, @note) do |note|

See the Rails Guides page on creating urls and paths for more detailed info.