从 Rails 5 升级到 6 会破坏 ActiveStorage

Question

我有一个 Rails5.2.2应用程序，我升级到了6.1.3.2. 我已经设法让除 ActiveStorage 之外的所有内容正常工作。我遇到的问题是我之前在 s3 上保存的图像现在使用相同的代码为 404。当我升级时，rails 创建了以下迁移（也运行了bin/rails app:upgrade）：

# This migration comes from active_storage (originally 20190112182829)
class AddServiceNameToActiveStorageBlobs < ActiveRecord::Migration[6.0]
  def up
    unless column_exists?(:active_storage_blobs, :service_name)
      add_column :active_storage_blobs, :service_name, :string

      if configured_service = ActiveStorage::Blob.service.name
        ActiveStorage::Blob.unscoped.update_all(service_name: configured_service)
      end

      change_column :active_storage_blobs, :service_name, :string, null: false
    end
  end

  def down
    remove_column :active_storage_blobs, :service_name
  end
end

和

# This migration comes from active_storage (originally 20191206030411)
class CreateActiveStorageVariantRecords < ActiveRecord::Migration[6.0]
  def change
    create_table :active_storage_variant_records do |t|
      t.belongs_to :blob, null: false, index: false
      t.string :variation_digest, null: false

      t.index %i[ blob_id variation_digest ], name: "index_active_storage_variant_records_uniqueness", unique: true
      t.foreign_key :active_storage_blobs, column: :blob_id
    end
  end
end

我正在使用此代码来渲染图像：

<%= image_tag(a.file.variant(resize: "100x100"), class: 'p-1') if a.file.variable? %>

我通过ActiveStorage作品上传的任何新图像都通过image_tag. 但是，我之前通过 s 存储的任何文件ActiveStorage 404。

development.rb我也在设置中config.active_storage.service = :amazon。自升级以来此配置未发生变化。