Formulario para generico, para subir imagenes, en ruby on Rails

Para subir los archivos use la libreria: https://hayageek.com/docs/jquery-upload-file.php

<script src="/libs/jQuery_Upload/jquery.uploadfile.min.js"></script>
<link href="/libs/jQuery_Upload/uploadfile.css" rel="stylesheet">

---

<div id="multipleupload" class="mt-4">Upload</div>
         <script>
             document.addEventListener('DOMContentLoaded', function () {
                 initializeUploadFile("#multipleupload", {
                     modelName: "<%= @embarque.class.name %>",
                     modelId: "<%= @embarque.id %>",
                     uploader: "guia_pdf"
                 });
             });
         </script>

Metodo en Js para inicializar el formulario

function initializeUploadFile(selector, options) {
    const defaultOptions = {
        url: `/storage/${options.modelName}/${options.modelId}/${options.uploader}?authenticity_token=${$('meta[name=csrf-token]').attr('content')}`,
        multiple: false,
        dragDrop: true,
        fileName: "file",
        sequential: true,
        sequentialCount: 1,
        showProgress: true,
        showDone: true,
        showStatusAfterSuccess: true,
        acceptFiles: 'pdf',
        allowedTypes: 'pdf',
        returnType: 'json',
        uploadStr: "Subir",
        doneStr: "Completado",
        showError: false,
        onError: function (files, status, errMsg, pd) {
            if (errMsg == 'Conflict') {
                $(pd.statusbar).append("<span>ERROR: La factura ya está en el sistema.</span><br>");
            } else if (errMsg == 'Unprocessable Entity') {
                $(pd.statusbar).append("<span>ERROR: El RFC no coincide.</span><br>");
            }
        }
    };

    // Merge default options with provided options
    const finalOptions = Object.assign({}, defaultOptions, options);

    $(selector).uploadFile(finalOptions);
}