Ruby-on-rails Rails：文件路径
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Rails: path of file
提问by socksocket
I have inside appa directory called csvand inside this dir I have a file called names.csvI want to use File.read(path:string)function to read the file.
what is the relative path to the file?
我在app一个名为的目录中csv，在这个目录中我有一个名为names.csv我想使用File.read(path:string)函数读取文件的文件。
文件的相对路径是什么？
回答by tamersalama
file = File.join(Rails.root, 'app', 'csv', 'names.csv')
File.read(file)
回答by user566245
You should do: Rails.root.join "app", "csv", "names.csv"
你应该做： Rails.root.join "app", "csv", "names.csv"
Rails.root returns a PathName object. PathName has a joinmethod which takes any number of arguments and appends it to the pathname to create the new path.
Rails.root 返回一个 PathName 对象。PathName 有一个join方法，它接受任意数量的参数并将其附加到路径名以创建新路径。
Read on PathName#join here:
在此处阅读 PathName#join：
http://www.ruby-doc.org/stdlib-1.9.3/libdoc/pathname/rdoc/Pathname.html#method-i-join
http://www.ruby-doc.org/stdlib-1.9.3/libdoc/pathname/rdoc/Pathname.html#method-i-join
回答by Laas
Rails.rootpoints to the top folder of your rails project, so the path would be:
Rails.root指向 Rails 项目的顶部文件夹，因此路径为：
File.read(File.join(Rails.root, 'app','csv','names.csv'))
回答by Atchyut Nagabhairava
Thanks for above answers, It also worked this way for me:
感谢上述答案，它也对我有用：
"#{Rails.root}/public/spreadsheets/file_name.xlsx"
