我正在使用Rails 3和carrierwave gem。carrierwave緩存圖像和主動記錄
我的問題是下一個:
我編碼與多個模型和關係嚮導形式。所以我的應用程序的產品有許多圖像通過圖像模型(它已被載入載波)。
由於表單有很多步驟,我希望暫時保存CarrierWave中具有緩存選項的圖像。那麼我最後一步我想恢復圖像並加載我的產品。所以我創建了一個名爲TempData的模型,它臨時保存數據(在這種情況下是cache_name),一個type_identifier和一個標記can_be_deleted。
例如,這些是我的模型:
產品型號:
class Product < ActiveRecord::Base
has_many :images, :as => :imageable, :dependent => :destroy
def save_images_in_temporal_folder(images_attributes)
begin
uploader = ImageUploader.new
images_attributes.to_hash.each do |image|
uploader.cache!(image[1]['filename'])
TempData.create(:data => uploader.cache_name, :can_deleted => false, :type_name => TempDataType.product_image_upload_to_words)
end
rescue
end
end
def load_images_from_temporal_folder
begin
uploader = ImageUploader.new
tmp_images = []
TempData.find_all_by_can_deleted_and_type_name(false, TempDataType.product_image_upload_to_words).map(&:data).each do |cache_name|
tmp_images << uploader.retrieve_from_cache!(cache_name)
end
tmp_images
rescue
end
end
end
圖像模型
class Image < ActiveRecord::Base
attr_accessible :imageable_type, :imageable_id, :filename
belongs_to :imageable, :polymorphic => true
mount_uploader :filename, ImageUploader
#validates :filename, :presence => true
end
我ImageUploader:
class ImageUploader < CarrierWave::Uploader::Base
configure do |config|
config.remove_previously_stored_files_after_update = false
end
include CarrierWave::RMagick
storage :file
def store_dir
"uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
end
def self.store_dir_for_file(model, mounted, filename, version = "")
filename = "#{version}_#{filename}" unless version.blank?
"uploads/#{model.class.to_s.underscore}/#{mounted}/#{model.id}/#{filename}"
end
process :resize_to_limit => [200, 300]
version :thumb do
process :resize_to_limit => [50, 50]
end
version :big do
process :resize_to_limit => [400, 400]
end
def extension_white_list
%w(jpg jpeg gif png)
end
end
那麼我如何使用模型和安裝信息保存/緩存圖像?如何檢索緩存並使用緩存中的圖像加載我的產品?
在此先感謝。對不起,我的英語,如果你需要更多的信息評論這個職位。