问题描述
我使用的想法与导入 csv 和 excel Railscast 但由于该集中的标准代码需要一些时间来处理(使用 ActiveRecord 为文件中的每一行创建一个新记录)我在 Heroku 上超时并希望将导入过程移至后台作业.
I'm using a similar idea as in the importing csv and excel Railscast but as the standard code in that episode takes some time to process (uses ActiveRecord to create a new record for each row in the file) I'm getting timeouts on Heroku and would like to move the import process to a background job.
我未能成功将文件变量(类型为 ActionDispatch::Http::UploadedFile)发送到作业，因此我发送了 file.original_filename 和 file.path 的各个变量
I have been unsuccessful at sending the file variable (which is of type ActionDispatch::Http::UploadedFile) to the job so instead I sent individual variables of the file.original_filename and file.path
作业失败，出现错误 file/var/folders/q3/xn0bp7yd2m56_4lbq0069jj80000gn/T/RackMultipart20150319-72431-1a4pnja.xlsx 不存在 我认为这已经发生了，因为文件已被删除在工作开始之前:
The job fails with the error file /var/folders/q3/xn0bp7yd2m56_4lbq0069jj80000gn/T/RackMultipart20150319-72431-1a4pnja.xlsx does not exist which I assume is happening because the file has already been deleted before the job begins as:
上传的文件是临时文件，其生命周期为一个请求.当对象最终确定时，Ruby 会取消链接文件，因此无需使用单独的维护任务清理它们.
ActionDispatch::Http::UploadedFile
使用 ActionDispatch::Http::UploadedFile 上传的文件可以不用于后台作业吗?
Can a file uploaded with ActionDispatch::Http::UploadedFile not be used in background jobs?
我正在使用 Rails 4.2、ActiveJob 和 Resque
I am using Rails 4.2, ActiveJob and Resque
推荐答案
不行，上传的文件不能用于后台作业.您需要做的是将上传的文件保存到一个更永久的位置，以便您的后台作业进行处理.
No, the uploaded file cannot be used in the background job. What you need to do is save the uploaded file to a more permanent location for your background job to process.
您的控制器需要类似于:
Your controller will need to something like:
file_path_to_save_to = '/path/to/file'
File.write(file_path_to_save_to, params[:uploaded_file].read)
BackgroundJob.perform_later file_path_to_save_to
这篇关于Rails - 后台作业中的 ActionDispatch::Http::UploadedFile的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！