Active Storage:当表单重新显示时保留/缓存上传文件的最佳实践 [英] Active Storage: Best practice to retain/cache uploaded file when form redisplays

问题描述

使用 Active Storage 上传文件时，当文件上传完成并且表单重新显示时，例如当表单验证由于某种原因失败时，文件就会消失.

When uploading files with Active Storage, when a file is finished uploading and the form gets redisplayed, for example when the validation for that form fails for some reason, the file is gone.

有没有办法在表单重新显示之间缓存或保留它?Shrine 有一个很好的插件为此目的，我正在寻找类似的东西活动存储.

Is there a way to cache or retain it between form redisplays? Shrine has a nice Plugin for that purpose, I'm looking for something similar for Active Storage.

推荐答案

这是一个使 ActiveStorage 文件在表单重新显示时持久化的解决方案:<代码>f.hidden_​​field :image, value: f.object.image.signed_id 如果 f.object.image.attached?f.file_field :image

Here's a solution to make ActiveStorage files persist on form redisplay: f.hidden_field :image, value: f.object.image.signed_id if f.object.image.attached? f.file_field :image

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