区分图像错误和形状错误

我使用的是dropzone.js。我有一个表单，在单击提交按钮时提交输入和图像。但是，当我返回一个输入（而不是图像）错误的错误时，error事件也会显示图像有错误，即使它没有。

例如，如果其中一个输入为空，并且表单返回了一个错误消息"请填写表单"，则上传的图像也会（错误地）出现错误，并且这会在HTML:中发生变化

<div class="dz-error-message"><span data-dz-errormessage="">[object Object]</span></div>

实际返回的错误（注意图像没有错误）：

{"success":"false","messages":{"message":["The message field is required."]}}

我的问题是，我如何修改我的代码，以识别返回的错误是图像错误还是表单输入错误？

这是我的JS：

Dropzone.options.formPost = {
    autoProcessQueue: false,
    uploadMultiple: true,
    parallelUploads: 25,
    maxFiles: 25,
    maxFilesize: 5,
    acceptedFiles: "image/*",
    clickable: "#image-upload",
    init: function() {
        var myDropzone = this;
        var form = $("#form-post");
        this.element.querySelector('button[type="submit"]').addEventListener("click", function(e)
        {
            e.preventDefault();
            e.stopPropagation();
            myDropzone.processQueue();
        });
        this.on("addedfile", function()
        {
            // some stuff
        });
        this.on("sendingmultiple", function()
        {
            // some stuff
        });
        this.on("successmultiple", function(files, response)
        {
            // some stuff
        });
        this.on("errormultiple", function(files, response)
        {
            // if an error is return, even though it has nothing to do with the image, it will show that the image has an error
            $.each(response.messages, function(key, value)
            {
                form.find('.form-group#' + key).addClass('has-error');
                form.find('.form-group#' + key + ' .form-error').html(value[0]).fadeIn();
            });
        });
    }
}

PHP（Laravel）：

public function createPost()
{
    $rules = array(
        'message' => 'required',
    );
    $validator = Validator::make(Input::except('file'), $rules);
    if ($validator->fails())
    {
        return Response::json(array(
            'success' => 'false',
            'messages' => $validator->messages()
        ), 400);
    }
    else
    {
        $post = new Post;
        $post->user_id = getUserID();
        $post->message = Input::get('message');
        $post->ip_address = getUserIP();
        $post->save();
        $files = Input::file('file');
        if ($files)
        {
            /**
             * Create a new directory for the post images.
             */
            File::makeDirectory(public_path() . '/uploads/posts/' . $post->id, 0775);
            foreach ($files as $file)
            {
                $file_rules = array('file' => 'image|max:5000');
                $validator = Validator::make(array('file' => $file), $file_rules);
                if ($validator->fails())
                {
                    return Response::json(array(
                        'success' => 'false',
                        'messages' => $validator->messages()
                    ), 400);
                }
                else
                {
                    $ext = $file->getClientOriginalExtension();
                    $dest = public_path() . '/uploads/posts/' . $post->id . '/';
                    $file_name = str_random(6);
                    $upload_success = $file->move($dest, $file_name . '.' . $ext);
                    if (!$upload_success)
                    {
                        return Response::json(array(
                            'success' => 'false',
                        ), 400);
                    }
                }
            }
        }
        return Response::json(array(
            'success' => 'true'
        ), 200);
    }
}