I am running Ruby on Rails on Nitrous
Rails 4.0.1
Ruby 2.0.0p247
I am trying to use the spreadsheet gem and open a file I added to my file system in Nitrous. But spreadsheet needs a file path to the document and the file paths I've tried always come up as
"No such file or directory"
My path I thought I should use is
~/workspace/excel-documents/reports.xls
But that is not working. How do I determine my file path in Nitrous?
EDIT------------------------------------------------------------------------------
Just figured out how to find the file path. Not sure if this should be added to the spreadsheets gem README or not. But I did the following...
Spreadsheet.client_encoding = 'UTF-8'.
require 'spreadsheet'
book = Spreadsheet.open File.absolute_path("excel-documents/report.csv")
sheet1 = book.worksheet 0
last_value = nil
sheet1.each do |row|
last_value = row[0].present? && row[0]
end
File.abosulte_path(). Got lucky on a stack exchange search and found the info on it.
http://www.ruby-doc.org/core-2.1.1/File.html#M000023
But now I'm trying to figure out an OLE2 signature is invalid message. Does any one know how formatting works for csv files in spreadsheets?
Related
I wants to read a excel file existing on Live URL of another website.
When I hit that URL in browser file is downloading. While in my rails app it is giving below error
No such file or directory # rb_sysopen - http://www.carsa.jp/admin/data.xlsx (Errno::ENOENT)
My Rails app code is as below
data = Roo::Excelx.new('http://www.carsa.jp/admin/data.xlsx')
header = data.row(1)
puts header
Note: If I download file and place it within my application it is working fine but the requirement is to read it from the third-party website in a scheduled job as per the above script.
data = Roo::Excelx.new('lib/data.xlsx')
header = data.row(1)
puts header
Try using Roo::Spreadsheet.open instead of Roo::Excelx.new. According to the Roo Readme:
Roo::Spreadsheet.open can accept both paths and File instances.
This should do the trick:
Roo::Spreadsheet.open('http://www.carsa.jp/admin/data.xlsx')
I asked this question earlier this week, and it worked fine. I just tried it with a slightly bigger spreadsheet and it doesn't seem to work for some reason.
My code is as follows:
require 'roo'
xlsx = Roo::Spreadsheet.open(File.expand_path('../Downloads/unistats/LOCATION.csv'))
xlsx.each_row_streaming(offset: 1) do |row|
Location.find_or_create_by(ukprn: row[0].value, accomurl: row[1].value, instbeds: row[3].value, instlower: row[4].value, instupper: row[5].value, locid: row[6].value, locname: row[7].value, lat: row[9].value, long: row[10].value, locukprn: row[11].value, loccountry: row[12].value, privatelower: row[13].value, privateupper: row[14].value, suurl: row[15].value)
end
But unlike last time, this is coming up with this error:
NoMethodError: undefined method `each_row_streaming' for #<Roo::CSV:0xb9e0b78>
Did you mean? each_row_using_tempdir
This file is a CSV rather than .xlsx but that shouldn't make a difference.
Any ideas what I'm doing wrong?
It does actually makes a difference that you're trying to read a CSV file using the Excel methods.
Excerpts from the Roo documentation.
# Load a CSV file
s = Roo::CSV.new("mycsv.csv")
# Load a tab-delimited csv
s = Roo::CSV.new("mytsv.tsv", csv_options: {col_sep: "\t"})
# Load a csv with an explicit encoding
s = Roo::CSV.new("mycsv.csv", csv_options: {encoding: Encoding::ISO_8859_1})
A neat way to read both Excel and CSV files is to do something like
if File.extname(filename).start_with?('xls')
workbook = Roo::Excel.new(filename)
else
workbook = Roo::CSV.new(filename)
end
workbook.default_sheet = workbook.sheets[0]
(workbook.first_row..workbook.last_row).each do |line|
...
end
I am having some trouble writing a file to a specific path taking the file name from excel. Here is the code which I am using
out_file = File.new (#temp_path/ "#{obj_info[3].to_s}","w")
"#{obj_info[3].to_s}" = sample.txt
The value sample.txt comes from Excel during run time
#temp_path = "C:/Users/Somefolder/"
The error displayed is:
NoMethodError: undefined method `[]' for nil:NilClass
However, if the code is:
out_file = File.new ("#{obj_info[3].to_s}","w")
it successfully creates a file called sample.txt in the default directory. However, I want it to be stored in a specific directory and the file name needs to be passed from Excel.
Any help is much appreciated.
I believe your problem is because there a space between / and "
#temp_path/ "#{obj_info[3].to_s}
and I guess you want to build a path.
My advice is that you use File.join
f_path = File.join(#temp_path,obj_info[3].to_s)
out_file = File.new (f_path,"w")
Let me know if that solved the problem
You have 2 problems:
obj_info is nil so you make an error reading the value from excel, the error you get indicates it is on an array, in the code you published the only thing that's an array is what you read from excel.
Print the contents with p obj_info right before your code to check.
#temp_path and {obj_info[3].to_s} need to be concatenated to make a path.
You can do that with File.join like Mauricio suggests or like this
out_file = File.new ("#{#temp_path}/#{obj_info[3]}","w")
You can drop the to_s in this case.
It would be better if you publish the whole of your script that is meaningful.
I am trying to simply add one more row to an existing excel file using spreadsheet gem.
test_url = "#{Rails.root}/data/Skipped_Records.xls"
if File.exists?(test_url)
book = Spreadsheet.open(test_url)
else
book = Spreadsheet::Workbook.new
book.create_worksheet
end
sheet = book.worksheet(0)
last_index = sheet.row(-1).idx
sheet.row(last_index + 1).concat [index, error]
book.write "#{Rails.root}/data/Skipped_Records.xls"
In first run the file is getting created fine.
But after second run, while opening the file LibreOffice says
Unknown or unsupported excel file format.
I am trying to migrate excel data into rails application using rake task. While doing it few rows are skipped because of certain errors. I am trying to log these skipped records.
Please help.
I need to create a local xml file from a rails application and then copy it to a location on another server.
I have tried using the File.new option to create a new file but it gives me an error saying the file does not exist. After looking closer at the documentation it says that File.new opens a file that already exists.
I can't see any way to create a local file using Ruby, what am I missing?
Assuming you have built up your XML into a string, xml_string, you can do:
xml_file = open(filename, 'w')
xml_file.write xml_string
xml_file.close
Or using the block syntax to achieve this in one line:
File.open(local_filename, 'w') { |f| f.write(xml_string) }