Javascript 让Dropzone.JS使用Carrierwave和多个图像

我是Rails的新手，我已经成功地通过carrierwave进行了多次上传（大约一周后）。现在我想让上传过程变得更好一点。我不确定发生了什么，但我似乎无法让它工作

我的表单如下所示：

.edit-container
    = simple_form_for @post, html: { multipart: true } do |f| 
        .edit-form
            = f.input :title
            = f.input :location, disabled: true
            = f.input :price
            = f.input :description
            = f.input :contact_number, placeholder: "(999) 999-9999"
            = f.label "Category"
            = f.text_field :category_name, data: {autocomplete_source: Category.order(:name).map(&:name)}, placeholder: "Choose a category"
            = f.fields_for :post_attachments do |p|
                = p.file_field :image, :multiple => true, name: "post_attachments[image][]"

            = f.button :submit
%script
    $('#post_location').val("#{request.location.city}, #{request.location.state}")

我试过这样做：

.edit-container
    = simple_form_for @post, html: { multipart: true, class: "dropzone" } do |f| 
        .edit-form
            = f.input :title
            = f.input :location, disabled: true
            = f.input :price
            = f.input :description
            = f.input :contact_number, placeholder: "(999) 999-9999"
            = f.label "Category"
            = f.text_field :category_name, data: {autocomplete_source: Category.order(:name).map(&:name)}, placeholder: "Choose a category"
            = f.fields_for :post_attachments do |p|
                = p.file_field :image, :multiple => true, name: "post_attachments[image][]"

            = f.button :submit
%script
    $('#post_location').val("#{request.location.city}, #{request.location.state}")

这就是结果（显然不是我想要的）：

错误消息显示：

ActionController::UnknownFormat in PostsController#create ActionController::UnknownFormat

你能告诉我如何在我的应用程序中实现dropzone.js吗