Home#index中的ActiveStorage :: InvariableError [英] ActiveStorage::InvariableError in Home#index

问题描述

当前，我正在尝试在Rails 6中显示 .HEIC 图像.我正在使用

Currently I'm trying to display .HEIC images in Rails 6. I'm using ActiveStorage ImageMagic to use variant to display jpg. Basically I'm trying to use

mogrify -format jpg myimage.heic

在图像中显示 jpg .

我将 Rails.application.config.active_storage.variant_processor 添加到application.rb中，以便能够使用该变体.但是，它似乎中断了以下行:

I added Rails.application.config.active_storage.variant_processor into application.rb to be able to use the variant. However it seems to break in the following line:

 <%= image_tag post.image.variant(format: 'jpg'), class: "card-home__img" %>

为什么不工作?

推荐答案

在调用 variable时，您只能在返回 true 的图像上调用 variant ?.

You can only call variant on an image that returns true when you call variable? on it.

在内部， ActiveStorage 检查 ActiveStorage.variable_content_types 是否包含图像的类型.支持的默认值为:

Internally, ActiveStorage checks if ActiveStorage.variable_content_types contains your image's type. The default supported values are:

• image/png
• 图像/gif
• 图像/jpg
• image/jpeg
• image/pjpeg
• 图像/tiff
• 图像/bmp
• image/vnd.adobe.photoshop
• image/vnd.microsoft.icon
• 图像/webp

• image/png
• image/gif
• image/jpg
• image/jpeg
• image/pjpeg
• image/tiff
• image/bmp
• image/vnd.adobe.photoshop
• image/vnd.microsoft.icon
• image/webp

因此，似乎当前不支持.HEIC图像.

So it seems that currently .HEIC images are not supported.

相反，您可以在将图像附加到模型或存储模型之前应用格式转换，这可能会解决您的用例.

You can instead apply a format transformation before attaching the image to a model or storing it, it might solve your use case.

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