class Admin::PageAttachmentsController

def load_model
  begin
    @asset = Asset.find(params[:asset_id])
    @page = page_attachment_params[:page_id].blank? ? Page.new : Page.find_by_id(page_attachment_params[:page_id])
  rescue ActiveRecord::RecordNotFound
    render nothing: true, layout: false
  end
  self.model = PageAttachment.new(asset: @asset, page: @page)
end

def new
  render partial: 'attachment', object: model
end

def page_attachment_params
  params.permit(:asset_id, :page_id)
end