我如何“保持”上传的图片上的表单验证错误？ [英] How can I "keep" the uploaded image on a form validation error?

问题描述

我有一个表单，其中包含一个 FileField 。想象一下，用户选择一个文件，按提交，另一个字段触发ValidationError。
当我收回表单时，页面上的错误，用户为文件字段选择的内容已经过去了。可以让它出现，还是这是一个浏览器？

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

这是一个浏览器的事情 - 出于安全考虑，你可以不预先填写一个文件输入，否则很容易欺骗用户上传文件，而不需要明确的操作。

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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