Question

我正在尝试在g：uploadForm提交后重定向页面。

我的g：uploadForm操作是保存。

保存如下：

  @Transactional
def save(DesignCategory designCategoryInstance) {
    if (designCategoryInstance == null) {
        notFound()
        return
    }

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

    def disotypeFile = request.getFile('disotype1')
    if(!disotypeFile.empty){
        print('here')
        def fname = disotypeFile.getOriginalFilename()
        def fileAtt = new FileAttachment()
        fileAtt.originalFilename = fname
        fileAtt.newFilename =   "disotype-"
        fileAtt.fileURI =  '/Users/work/Desktop/files/' +   fileAtt.newFilename
        disotypeFile.transferTo(new File(fileAtt.fileURI))
        response.sendError(200, 'Done')
        fileAtt.save(flush: true)
        designInstance.disotype = fileAtt;
    }

        designCategoryInstance.save flush: true,  failOnError:true

    flash.message = message(code: 'default.created.message', args: [message(code: 'designCategoryInstance.label', default: 'DesignCategory'), designCategoryInstance.id])
    redirect designCategoryInstance

}

这会出现以下错误：

 Cannot issue a redirect(..) here. The response has already been committed either by another redirect or by directly writing to the response.. Stacktrace follows:
 Message: Cannot issue a redirect(..) here. The response has already been committed either by another redirect or by directly writing to the response.

如果我拿出

，这确实有效

    def disotypeFile = request.getFile('disotype1')

但显然我无法获取该文件。

任何想法？

Answer 1

尝试删除行：

response.sendError(200, 'Done')

uploadForm后Grails重定向

1 个答案: