grails - HTML5拖放多文件上传grails插件

Question

我正在使用HTML5 drag and drop multi-file upload plugin在Grails应用程序中上传一些文件，但是我想将上传的文件保存到数据库，但是我不知道保存在请求和params 中搜索到的上传文件的对象是什么，这是 _form View 中的标签:

<uploadr:add name="myUploadrName"  controller="photos" action="save"   direction="up" maxVisible="8" unsupported="/my/controller/action" rating="false" voting="false" colorPicker="false" maxSize="204800" />

这是创建 View :

<g:form  url="[resource:photosInstance]" enctype="multipart/form-data"><fieldset class="form">
                <g:render template="form"/>
            </fieldset>
            <fieldset class="buttons">
                <g:submitButton id = "submitBtn" name="create" class="save" value="${message(code: 'default.button.create.label', default: 'Create')}" />
            </fieldset>
        </g:form>

这是保存操作:

def save(Photos photosInstance) {
    if (photosInstance == null) {
        notFound()
        return
    }

    if (photosInstance.hasErrors()) {
        respond photosInstance.errors, view:'create'
        return
    }

    request.getFileNames().each{
        request.getFiles(it).each { file ->
            // loop through all files selected
            println "name: $file.name Originalfilename: $file.originalFilename contentType: $file.contentType"
            photosInstance= new Photos(photo:file.bytes).save(failOnError:true)

        }
    }

    /*request.withFormat {
     form multipartForm {
     flash.message = message(code: 'default.created.message', args: [
     message(code: 'photos.label', default: 'Photos'),
     photosInstance.id
     ])
     redirect photosInstance
     }
     '*' { respond photosInstance, [status: CREATED] }
     }*/
    }

Answer 1

当我没有 Controller 代码时，有点难以提供帮助，但是请尝试以下操作:

UploadedFile uploadedFile = UploadedFile.get(params.fileId)
if (!uploadedFile) response.sendError(404, "No uploaded file could be found matching id: ${params.fileId}.")

GridFSFile gridFSFile = uploadedFile.file
if (!gridFSFile) response.sendError(404, "No file attached to UploadedFile")