simple_form submit modal with remote:true against inherited_resources and working form validation in rails.

_new.html.haml

.modal-dialog
  .modal-content
    .modal-header
      %button.close{"aria-hidden" => "true", "data-dismiss" => "modal", type: "button"} ×
      %h4.modal-title= t'new_node'
    .modal-body
      = simple_form_for @node, remote: true do |f|
        - value = params[:environment_id].nil? ? {} : { value: params[:environment_id] }
        = f.input :environment_id, as: :hidden, input_html: {}.merge(value)
        = render 'nodes/form_fields', f: f
        = f.button :submit, id: 'submit', class: 'btn btn-success'

nodes_controller.rb

class NodesController < InheritedResources::Base
  respond_to :html, :json, :js

...

  def update
    update! do |success, failure|
      @node = NodeDecorator.new(@node)
      success.js { @node }
      failure.js { render :edit }
    end
  end

  def create
    create! do |success, failure|
      @node = NodeDecorator.new(@node)
      success.js { @node }
      failure.js { render :new }
    end
  end

...

end