上传的标签是这样的写的。

<el-upload
    class="upload-demo"
    ref="uploadNewFile"
    :action="actionUrl"
    :file-list="fileList"
    :auto-upload="false"
    :on-change="newFileChange"
    :on-remove="removeFile"
    :data="newFileData"
    name="files"
    :on-preview="handlePreview">
    <el-button type="primary" class="button b2 upload">
    <i class="iconfont icon-shangchuan"></i> 上传
    </el-button>
    <el-input style="display: none" v-model="formData.newFile"></el-input>
</el-upload>

提交的时候

saveIt: function () {
                this.$refs['newAddForm'].validate((valid) => {
                    if(valid){
                        if (this.fileNameCheckFlag) {
                            this.newFileData.dictionaryName = this.formData.fileName;
                            this.newFileData.indexName = this.formData.fileName;
                            this.newFileData.isPublish = false;
                            this.newFileData.menuId = 256;
                            this.$refs['newAddForm'].resetFields();
                            this.zDialog.showAdd = false;
                            this.$refs.uploadNewFile.submit();
                            }
                    }

但是上传文件提交的时候需要带上 this.newFileData.title(文件名)，和 this.newFileData.sort（文件排序号）；
请问上传多个文件的时候文件名和文件排序号怎么赋值？ 在哪里赋值？