How to make MongoDB update the position field?

Question

MongoDB

I want to update the position field of Attachinary::File
I'm using ruby ​​2.5.0, rails 5.2.2, mongoid, 'jquery-ui-rails' and modified Attachinary gem to load
application.js images

jQuery(function() {
  $(document).on('turbolinks:load', function(){
    $('.attachinary-input').attachinary()

    $("#images").sortable({
      update: function(e, ui) {
        Rails.ajax({
          url: $(this).data("url"),
          type: "PATCH",
          data: $(this).sortable('serialize'),
        });
      }
    });
  });
})

routes.rb

resources :projects do
    collection do
      patch :sort
    end
end

project.rb

class Project
  include Mongoid::Document

  has_attachments :images
end

show.html.erb

<div id="images" class="grid" data-url="<%= sort_projects_path %>">
  <% @project.images.order(position: :desc).each do |image| %>
    <div id="image_<%= image.id %>" class="box">
      <div class="box-image">
        <%= cl_image_tag(image.path, width: '250', height: '250', crop: 'thumb') %>
      </div>
    </div>
  <% end %>
</div>

projects_controller.rb

class ProjectsController < ApplicationController
  def sort
    params[:image].each_with_index do |id, index|
      Attachinary::File.where(id: id).update_all(position: index + 1)
    end
    head :ok
  end

When you try to drag an image, the following message appears. But position is not updated :

}} MONGODB | localhost:27017 | squarely_development.find | SUCCESSED | 0.001s Completed 200 OK in 6ms }} MONGODB | localhost:27017 | squarely_development.find | SUCCESSED | 0.001s Completed 200 OK in 6ms
end

If I use ActiveRecord and gem 'pg' everything works