如何获取模型中图像变体的 url(在控制器/视图之外)?主动存储 [英] How can I get url of image variant in model (outside of controller/view)? Active Storage

问题描述

我可以使用此代码(Active Storage)获取模型中的 url

I can get url in model with this code (Active Storage)

Rails.application.routes.url_helpers.rails_blob_path(picture_of_car, only_path: true)

但我需要获取调整大小的变量的网址

But I need get url of resized varian

picture_of_car.variant(resize: "300x300").已处理

例如这段代码

Rails.application.routes.url_helpers.rails_blob_path(picture_of_car.variant(resize: "300x300").processed, only_path: true)

扔

NoMethodError (undefined method `signed_id' for #< ActiveStorage::Variant:0x0000000004ea6498 >):

推荐答案

解决方案:

Rails.application.routes.url_helpers.rails_representation_url(picture_of_car.variant(resize: "300x300").processed, only_path: true)

在此处提供了答案.

对于一个变体，您需要使用 rails_representation_url(variant) - 这将构建一个类似于 rails_blob_url 构建的 URL，但专门针对该变体.

for a variant you need to use rails_representation_url(variant) - this will build a url similar to the one that rails_blob_url builds but specifically for that variant.

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