Json parseerror & unexpected token

Question

Still trying to fix my ajax to work with the controller. Now I get this error message:

response SyntaxError: Unexpected token j ,  xhr[object Object] ,  STATUS parsererror

config.routes

resources :books do 
    member do 
      get '/last_chapter/', to: 'chapters#last_chapter', as: 'last_chapter', defaults: { format: 'json' }
    end
    resources :chapters
  end

chapter controller

def last_chapter
        @last_chapter = Chapter.order(created_at: :desc).limit(1)
        respond_to do |format|
            format.json
        end
    end

last_chapter.json

json.extract! @last_chapter, :id, :title, :characters, :created_at, :updated_at

script.js

$.ajax({
      type: "GET",
      url: '/books/103/last_chapter.json',
      contentType: "application/json",
      success: function(data) {
        console.log('JAAAA ENDELIG FUNKER DET');
        $("body").html(data);
      },
      error: function(xhr, status, response) {
        console.log('response ' + response +  ' ,  xhr' + xhr +  ' ,  ' + 'STATUS ' + status)}
    });

Feel like I have tried everything. Please let me know if you need anymore information! :)

born4new · Accepted Answer · 2016-04-12 14:57:30Z

1

I think your problem lies in the routes. Here is what I would do:

resources :books do
  get :last_chapter, on: :member
end

books_controller.rb

def last_chapter
  @last_chapter = Book.find(params[:id]).chapters.last
  respond_to do |format|
    format.json do
      render json: { does_it_work: :yes }
    end
  end
end

I assume the following model:

class Book < ActiveRecord::Base
    has_many :chapters
end

edited Apr 12, 2016 at 14:57

answered Apr 12, 2016 at 14:18

born4new

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13 Comments

Cinta Over a year ago

How would you do the url for the ajax? For now it can't find "/last_chapter" because I need the last chapter id.

born4new Over a year ago

I would leave the ajax call as it is. What's the point of last_chapter action then if you need to know the id of it? You need to provide a book_id, and then this action should return the last chapter of this book!

Cinta Over a year ago

Also, when I add in the url manually (with the chapter id) like this. url: '/books/103/chapters/206/last_player.json', I get this error: ` Error in response to storage.get: TypeError: Cannot read property 'style' of null at Object.callback (chrome-extension://kchdfagjljmhgapoonapmfngpadcjkhk/js/scripts.js:24:42) at chrome-extension://kchdfagjljmhgapoonapmfngpadcjkhk/js/scripts.js:11:21`

Cinta Over a year ago

If I leave the url as it was it gives me this error: 404 (Not Found)

born4new Over a year ago

Do you have a book with id 103?

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