Cannot write spreadsheet to an already opened file #254
Description
If I understand the documentation correctly, one should be able to pass an IO object to the spreadsheet.write() method, and indeed this does seem to produce some output, but...
This works:
book.write('timetable1.xls')
This also works:
buffer = StringIO.new
book.write(buffer)
buffer.rewind
File.open("timetable2.xls", "w:ASCII-8BIT") do |file|
file.write(buffer.read)
end
but this does not work:
File.open("timetable3.xls", "a+:ASCII-8BIT") do |file|
book.write(file)
end
A file is produced but it isn't recognized by anything as being an XLS file. The "a+" is necessary because without it the call on "book.write()" produces an exception because it can't read (!) from the file. The ASCII-8BIT I tried adding because it seems to be necessary on the second working version in order to produce output identical to the first version. However, it doesn't seem to help.