Can SpineJS url() support Nested Resource in Rails?

Question

Rails have Nested Resources for a while, and it has been heavy used (or overused). Say we have two model, Article and Comment.

class Article < ActiveRecord::Base
  has_many :comments
end

class Comment < ActiveRecord::Base
  belongs_to :article
end

Define the Nested Resource in routes.rb

resources :articles do
  resources :comments
end

So now, we can list comments by specific article: http://localhost:3000/articles/1/comments

But Spine can only make url for post request to create Article and Comment like this:

/articles
/comments

How to make Spine's url for Ajax request like this?

/articles/1/comments

I know I can override the url() in Comment Model for retrieval comments, but what about creating a new record?

I also go through the source code as well, what I found is that the create() method in Spine's Ajax module doesn't care about the custom url() function in instance of Comment. what I want is just pass the article_id and using it with my custom url() function to generate url, then I can posting to server for create.

Does it possible without fork and modified version of Spine fo my own?

btw: sorry for my English, wish all of you guys can understand what I want to say about :-)

Thank you and best regards,

Answer 1

The model's url property can be a value or a function. So you could do:

class Comment extends Spine.Model
  @configure "comment", "article_id"
  @extend Spine.Model.Ajax

  @url: ->
    "articles/#{article_id}/comments"

or something similar. The ajax module will evaluate this property and use it as the resource end point when building requests.

Answer 2

add

#= require spine/relation

to app/javascript/app/views/index.js.cofee

to add the relation extension

class App.Project extends Spine.Model
  @configure 'Project', 'name'
  @extend Spine.Model.Ajax
  @hasMany 'pages', 'projects/page'

class App.Page extends Spine.Model
  @configure 'Page', 'name', 'content'
  @extend Spine.Model.Ajax
  @belongsTo 'project', 'Project'

in javascript console

App.Project.find(the_id).pages().create({name:"asd"})

more info in http://spinejs.com/docs/relations

the link is at the bottom of spinejs model documentation

Answer 3

I have a solution:

http://groups.google.com/group/spinejs/browse_thread/thread/6a5327cdb8afdc69?tvc=2

https://github.com/SpoBo/spine

I made a fork which overrides how url's are generated in the ajax module. This allows the create url to contain bits of the model's instance data. For example: /articles/1/comments. Works with create, update, etc.

class App.Post extends Spine.Model 
  @configure 'Post', 'channel_id', 'title' 
  @extend Spine.Model.Ajax 

  resourceUrl: -> 
    "channels/#{@channel_id}/posts" 

  @hasOne 'channel', 'App.Channel'