我怎样才能“保持"?表单验证错误上的上传图像? [英] How can I "keep" the uploaded image on a form validation error?

问题描述

我有一个表单，其中包含 FileField 以及其他字段.想象一下，用户选择了一个文件，按下提交，另一个字段触发了 ValidationError.当我取回表单时，页面上有错误，用户为文件字段选择的内容已经消失.我可以让它出现吗，还是浏览器的问题?

I have a form which has a FileField among other fields. Imagine the user chooses a file, presses submit and another field triggers a ValidationError. When I get back the form, with the errors on the page, what the user chose for the file field is gone. Can I make it appear, or is this a browser thing?

推荐答案

这是浏览器的问题 - 出于安全原因，您不能预先填充文件输入，否则很容易诱骗用户从他们的系统上传文件没有他们的明确行动.

This is a browser thing - for security reasons, you can't prepopulate a file input, otherwise it would be easy to trick users into uploading files from their system without their explicit action.

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