ruby 如何在与存储交互时动态选择雾提供程序？

s5a0g9ez 于 2023-08-04 发布在 Ruby

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我有一个简单的rails模型，其中包含一个image。这些图像目前存储在AWS S3中，但我需要将它们移动到Backblaze。我有一个上传类，看起来也是这样的：

class CarImage < ApplicationRecord
  VALID_BACKENDS = [:s3, :backblaze].freeze
  enum backend: VALID_BACKENDS
  mount_uploader :image, CarImageUploader

  belongs_to :car
end

class CarImageUploader < CarrierWave::Uploader::Base
  configure do |config|
    config.fog_credentials = {
      provider: "AWS",
      aws_access_key_id: Rails.application.credentials.aws_access_key_id,
      aws_secret_access_key: Rails.application.credentials.aws_secret_access_key,
      region: Rails.application.credentials.aws_region
    }
    config.fog_directory  = Rails.application.credentials.aws_image_bucket
    config.fog_public     = true
    config.fog_attributes = { "Cache-Control" => "max-age=315576000" }
    config.remove_previously_stored_files_after_update = false
  end

  def store_dir
    "uploads/car_images/#{model.car_id}"
  end
end

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现在我的问题是，我需要根据model.backend动态更改config.fog_credentials。我如何才能做到这一点？我可以从一个上传器中完成它吗？或者我需要不同的上传器类-如果是这样，我如何根据backend属性选择哪一个应该用于CarImage模型？
谨致问候

ruby

来源：https://stackoverflow.com/questions/76669050/how-do-i-dynamically-choose-fog-provider-when-interacting-with-the-storage

1条答案

按热度按时间

jgzswidk1#

您可以检查model的后端并适当设置凭据：

class CarImage < ApplicationRecord
  VALID_BACKENDS = [:s3, :backblaze].freeze
  enum backend: VALID_BACKENDS
  mount_uploader :image, CarImageUploader

  belongs_to :car
end

class CarImageUploader < CarrierWave::Uploader::Base
  configure do |config|
    config.fog_public     = true
    config.fog_attributes = { "Cache-Control" => "max-age=315576000" }
    config.remove_previously_stored_files_after_update = false
  end

  def fog_credentials
    model.s3? ? s3_fog_credentials : backblaze_fog_credentials
  end

  def fog_directory 
    model.s3? ? Rails.application.credentials.aws_image_bucket : Rails.application.credentials.backblaze_image_bucket
  end

  def store_dir
    "uploads/car_images/#{model.car_id}"
  end

  private

  def s3_fog_credentials
    {
      provider: "AWS",
      aws_access_key_id: Rails.application.credentials.aws_access_key_id,
      aws_secret_access_key: Rails.application.credentials.aws_secret_access_key,
      region: Rails.application.credentials.aws_region
    }
  end

  def backblaze_fog_credentials
    # your backblaze go here
  end
end

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ruby 如何在与存储交互时动态选择雾提供程序？

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