我试图创建一个可以下载包含文件的zip的函数。我跟着this tutorial,如果您要下载CSV(我翻译了评论),我的代码应该如下所示:
def exporter_zip
# CSV's header
csv = "Title;Content;Publishing date;File name;\n"
# Loop over articles saved in database
Article.all.each do |article|
# Creating the CSV with datas
csv += "#{article.title};#{article.content};#{article.publishing_date.strftime("%Y-%m-%d") if article.publishing_date };#{article.file_name}\n"
end
# Creating the zip file inside the folder
zip_tmp = File.new("#{Rails.root}/db/mon_fichier.zip", "w+")
# opening the file in writing mode
Zip::File.open(zip_tmp.path, Zip::File::CREATE) {
|zipfile|
# Inserting the csv variable's content inside the article.csv file, which is inserted into the zip file
zipfile.get_output_stream("articles.csv") { |f| f.puts csv }
}
# Sending the created file
send_file "#{Rails.root}/db/mon_fichier.zip"
end
以下是我如何调整代码:
class DownloadController < ApplicationController
require 'zip'
def zip
# Creating zip file
zip_tmp = File.new("#{Rails.root}/public/zip-#{Time.now.strftime('%d-%m-%Y')}.zip", 'w+')
FileDetail.all.each do |fichier|
Zip::File.open(zip_tmp.path, Zip::File::CREATE) { |zipfile|
# fichier.filename => file.mp3
# fichier.path => path/to/file.mp3
zipfile.get_output_stream(fichier.filename, fichier.path)
}
end
send_file "#{Rails.root}/public/zip-#{Date.today.to_time}.zip"
end
end
但是,虽然我甚至不确定我是否正确执行此操作,但我收到以下错误:cannot open entry for reading while its open for writing
,定位以下行:Zip::File.open(zip_tmp.path, Zip::File::CREATE) { |zipfile|
任何人都可以告诉我发生了什么事吗?我从来没有这样做过,所以我不知道出了什么问题......
提前谢谢
答案 0 :(得分:1)
FileDetail.all.each do |fichier|
Zip::File.open(zip_tmp.path, Zip::File::CREATE) { |zipfile|
# fichier.filename => file.mp3
# fichier.path => path/to/file.mp3
zipfile.get_output_stream(fichier.filename, fichier.path)
}
end
这样做会尝试为FileDetail的每个成员创建zip文件。您应该将其编码为仅打开并创建一次:
Zip::File.open(zip_tmp.path, Zip::File::CREATE) do |zipfile|
FileDetail.all.each do |fichier|
# fichier.filename => file.mp3
# fichier.path => path/to/file.mp3
zipfile.get_output_stream(fichier.filename, fichier.path)
end
end