用rails上传文件时会覆盖吗？

Question

我使用以下代码在rails中上传文件：

name = upload['datafile'].original_filename
directory = "public/data/#{id}/#{app_id}"

Dir.mkdir("#{RAILS_ROOT}/public/data/#{id}/#{app_id}")

path = File.join(directory, name)

File.open(path, "wb") { |f| f.write(upload['datafile'].read) }

有人可以告诉我如何告诉rails，它应该在文件已经存在时覆盖该文件吗？

谢谢！

Answer 1

您应该检查目录是否已经存在：

name = upload['datafile'].original_filename
directory = "public/data/#{id}/#{app_id}"

Dir.mkdir("#{RAILS_ROOT}/public/data/#{id}/#{app_id}") unless Dir.exist? "#{RAILS_ROOT}/public/data/#{id}/#{app_id}"

path = File.join(directory, name)

File.open(path, "wb") { |f| f.write(upload['datafile'].read) }