JSON to CSV write data to csv file [closed] - json

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I have a small script:
require "csv"
require "json"
puts "JSON file name (include extension) ->"
jsonfile = gets.chomp
json = JSON.parse(File.open(jsonfile).read)
#puts json.first.collect {|k,v| k}.join(',')
puts json.collect {|node| "#{node.collect{|k,v| v}.join(',')}\n"}.join
CSV.open("generated.csv", "wb") do |csv|
csv << json.collect {|node| "#{node.collect{|k,v| v}.join(',')}\n"}.join
end
In the terminal it shows like this:
Missing: [User],{"error"=>[{"Something"=>"", "errno"=>"somthing", "de"=>"smoehting", "pe"=>"error", "errorMessage"=>"Missing "}], "data"=>nil}
Missing: [User],{"error"=>[{"Something"=>"", "errno"=>"somthing", "de"=>"smoehting", "pe"=>"error", "errorMessage"=>"Missing "}], "data"=>nil}
I need to output each row into a seperate row in a csv file. The above is what im trying to do to write it to csv, but it does not work

Answer 1

Your first mistake in your code is that you call << only one time. Each << creates one line, so you have to call << method n-times, where n is a number of lines.
Your second mistake is that you concatenate the array elements and try to pass a string as a <<'s argument. Each <<'s argument should be an array.
Summarizing, to create a CSV file containing two lines:
# my.csv
1,2,3
4,5,6
you should write:
CSV.open("my.csv", "wb") do |csv|
csv << [1, 2, 3]
csv << [4, 5, 6]
end
Similarly, to achieve your desired effect, try to rewrite your code as:
CSV.open("generated.csv", "wb") do |csv|
json.each do |node|
csv << node.collect { |k,v| v }
end
end