如何在play2中获取其他输入的上传文件? [英] How to get the upload file with other inputs in play2?

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问题描述

在html中,一个包含多部分数据的表单:

 < form action =@ routes.Files.uploadmethod =postenctype =multipart / form-data> 
< input type =hiddenname =groupIdvalue =1/>
< input type =hiddenname =tagIdvalue =2/>
< input type =filename =file/>
< input type =submitvalue =upload it/>
< / form>

如何编写动作文件上传



我知道如何获取上传的文件:

 请求。 body.file(file)map {
filepart => filepart.ref.moveTo(NEWFILE);
}

以及如何获取提交的输入:

 表单(元组(groupId - >文本,tagId - >文本))。 ..,
params => ....

但是如何将它们结合在一起?



我没有找到文件的适当类型可用于 Form(tuple(...)),既不是获取 request.body 中的输入值的方法。 >

解决方案

这个答案是针对Java的,但是您应该可以很容易地将其适配到Scala。 b $ b

你需要做的是定义一个模型,除了文件外,你的表单中的所有字段。然后像正常一样使用文件上传API来检索文件。



例如,这就是我所做的:

  @form(action = (uploadForm(lang))
@inputText(uploadForm(国家))
@inputFile(uploadForm(resourceFile))

< p>
< input type =submit>
< / p>




$ b

模型(models / UploadResource.java) :

pre $ public class UploadResource {
@Required
public String lang;

@必需
公共字符串国家;
$ b $ *注意缺少一个字段* /
}

控制器(controllers / UploadResourceController.java):

  public static Result doUpload ){
表格<上传资源> filledForm = uploadForm.bindFromRequest();

if(filledForm.hasErrors()){
return badRequest(views.html.upload.render(filledForm));
} else {
UploadResource resource = filledForm.get();
MultipartFormData body = request()。body()。asMultipartFormData();
FilePart resourceFile = body.getFile(resourceFile);
$ b $ *检查resourceFile为null,然后提取File对象并处理它* /
}
}

我希望这有助于。


In html, a form with multipart data:

<form action="@routes.Files.upload" method="post" enctype="multipart/form-data">
    <input type="hidden" name="groupId" value="1" />
    <input type="hidden" name="tagId" value="2" />
    <input type="file" name="file"/>
    <input type="submit" value="upload it"/>
</form>

How to write the action Files upload?

I know how to get a uploaded file:

request.body.file("file") map {
    filepart => filepart.ref.moveTo(newFile);
}

And how to get submitted inputs:

Form(tuple("groupId" -> text, "tagId" -> text)).bindFromRequest.fold(
    errors => ...,
    params => ....
)

But how to combine them together?

I don't find a suitable type for file can be used in Form(tuple(...)), and neither a way to get input value in request.body.

解决方案

This answer is for Java, but you should be able to adapt it to Scala fairly easily.

What you need to do is define a Model for all the fields in your form except the file. Then use the file-upload API as normal to retrieve the file.

For example, this is what I did:

The Form (in upload.scala.html):

@form(action = routes.UploadResourceController.doUpload(), 'enctype -> "multipart/form-data") {

    @inputText(uploadForm("lang"))
    @inputText(uploadForm("country"))
    @inputFile(uploadForm("resourceFile"))

    <p>
        <input type="submit">
    </p>
}

The Model (models/UploadResource.java):

public class UploadResource {
    @Required
    public String lang;

    @Required
    public String country;

    /* notice a field for the file is missing */
}

The Controller (controllers/UploadResourceController.java):

public static Result doUpload() {
    Form<UploadResource> filledForm = uploadForm.bindFromRequest();

    if (filledForm.hasErrors()) {
        return badRequest(views.html.upload.render(filledForm));
    } else {
        UploadResource resource = filledForm.get();
        MultipartFormData body = request().body().asMultipartFormData();
        FilePart resourceFile = body.getFile("resourceFile");

        /* Check resourceFile for null, then extract the File object and process it */
     }
}

I hope this helps.

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