手動上傳並保存在Carrierwave中的文件

Question

我有一個現有文件的目錄，我需要遷移到我的Rails應用程序作爲傳統遷移的一部分。基本上我需要手動上傳這些文件並在數據庫中爲它們保存一條新記錄。我還沒有找到正確的方法來做到這一點。目前我已在在rake任務如下：

@attachments.each do |attachment| 
    begin 
    new_attachment = Attachment.new 

    @attachment_file_path = "/home/username/Attachments/" + attachment.Filename 
    file = File.open(@attachment_file_path) 
    new_attachment[:file] = new_attachment.file.store!(file) 

    # Map old record fields to new 
    new_attachment.attributes = { 
     :project_id => attachment.ProjectID, 
     :name => attachment.Description, 
     :user_id => attachment.UserId, 
     :created_at => attachment.CreatedDate, 
     :updated_at => attachment.LastModifiedDate 
    } 

    new_attachment.save! 

    puts "Attachment added successfully " 

    rescue => error 
    puts "Error migrating Attachment: #{error}" 
    end 
end 

attachment.rb

class Attachment < ActiveRecord::Base 
    mount_uploader :file, FileUploader 
end 

上傳：

class FileUploader < CarrierWave::Uploader::Base 

    include CarrierWave::RMagick 
    include CarrierWave::MimeTypes 

    process :set_content_type 
    storage :fog 

    def store_dir 
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}" 
    end 

    def extension_white_list 
    %w(jpg jpeg gif png pdf doc docx txt) 
    end 

    version :thumb do 
    process resize_to_fit: [152, nil] 
    end 

    def default_url 
     ActionController::Base.helpers.asset_path("fallback/" + [version_name, "default.png"].compact.join('_')) 
    end 

    protected 
    def image?(new_file) 
     if new_file.content_type == nil 
     return false 
     else 
     new_file.content_type.include? 'image' 
     end 
    end 


end 

這並不目前的工作。該文件從未被上傳，偶爾我得到以下錯誤：

Failed to manipulate with rmagick, maybe it is not an image? Original Error: no decode delegate for this image format 

在這種情況下，該文件是一個「.DOC」文件。

打開本地文件並通過Carrierwave手動上傳它的正確方法是什麼？

任何幫助表示讚賞。

Answer 1

試試這個

@attachments.each do |attachment| 
    begin 
    options = { 
     :project_id => attachment.ProjectID, 
     :name => attachment.Description, 
     :user_id => attachment.UserId, 
     :created_at => attachment.CreatedDate, 
     :updated_at => attachment.LastModifiedDate, 
     :file => File.new(File.join("/home/username/Attachments/",attachment.Filename)) 
    } 

    new_attachment = Attachment.new(options) 


    new_attachment.save! 

    puts "Attachment added successfully " 

    rescue => error 
    puts "Error migrating Attachment: #{error}" 
    end 
end 

也許這會爲你做的carrierwave將內部調用store!爲

你的問題？

Failed to manipulate with rmagick, maybe it is not an image? Original Error: no decode delegate for this image format 

不知道你有什麼，因爲你必須定義未在條件中指定的image?方法在這裏過度也就是東西，你想要的content_type是隻存在於image文件

如果no也許只有過程調用將工作

process :set_content_type

如果yes那麼也許你必須做這樣的事情

process :set_content_type , :if => :image? 

def image?(new_file) 
    %w(jpg jpeg gif).include?(new_file.extension) 
end 

希望這有助於基於評論

編輯試試這個剛剛使用的條件相同的邏輯爲響應

version :thumb ,:if => image? do 
    // your code 
    end