rails 3 pagination with kaminari on mongoid embedded documents

When I call paginate with kaminari on a collection of embedded documents I get the following error:

(Access to the collection for Document is not allowed since it is an embedded document, please access a collection from the root document.):

Any idea on how I can开发者_开发问答 fix that ? I have installed kaminari as a gem.

Alex

You just need to access the collection through the parent object. For example, given the following models:

class User
  include Mongoid::Document
  embeds_many :bookmarks
end

class Bookmark
  include Mongoid::Document
  embedded_in :user
end

Then to paginate a given user's bookmarks you would do:

@user.bookmarks.page(params[:page])

I found this issue on Kaminari: https://github.com/amatsuda/kaminari/issues/89

So I forked it, and fixed it following the solution provided by spatrik. I am not 100% sure it will work on all cases and that this solution does not have any drawbacks. But for the moment it works exactly as expected.

Alex

I just sent a patch for the issue. Take a look at the request. hope this helps solve your issue.
https://github.com/amatsuda/kaminari/pull/155/files

With the previous theTRON example :

class User
  include Mongoid::Document
  embeds_many :bookmarks
end

class Bookmark
  include Mongoid::Document
  field :created_at, :type => DateTime

  embedded_in :user
end

the following, will get you the error you described in your post :

@user.bookmarks.desc(:created_at).page(params[:page])

while the nex one will works fine :

@user.bookmarks.page(params[:page]).desc(:created_at)

I hope it help.