Error message when running Rake command in Rails app - ruby

Question

I'm trying to create posts in my Rails app by pulling data from a CSV file.
When I try to run a Rake command, I get the error message below. What's wrong with this code?
SEED.RAKE FILE
require 'csv'
namespace :csv do
desc "Import CSV Data for Michelin Star Restaurants"
task :post => :environment do
csv_file_path = 'db/data.csv'
CSV.foreach(csv_file_path) do |row|
Post.create({
:name => row[1],
:address => row[2],
:city => row[3],
:michelin_status => row[4],
:website => row[5],
:phone => row[6],
:longitude => row[7],
:latitude => row[8],
:inthenews => row[9],
:google_reviews => row[10],
})
end
end
end
ERROR MESSAGE FROM CONSOLE
Faisals-Air:dinner fkhalid2008$ rake csv:post
rake aborted!
ArgumentError: invalid byte sequence in UTF-8
/Users/fkhalid2008/dinner/lib/tasks/seed.rake:11:in `block (2 levels) in <top (required)>'
/Users/fkhalid2008/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `eval'
/Users/fkhalid2008/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `<main>'
Tasks: TOP => csv:post
(See full trace by running task with --trace)
DB MIGRATE FILE
class CreatePosts < ActiveRecord::Migration
def change
create_table :posts do |t|
t.string :name
t.string :inthenews
t.string :michelin_status
t.string :google_reviews
t.string :address
t.string :city
t.string :website
t.integer :phone
t.integer :longitude
t.integer :latitude
t.timestamps null: false
end
end
end
CSV FILE SCREENSHOT

Answer 1

This is because somewhere in your file there are some invalid bytes.
To avoid this issue, you can use scrub method like this:
CSV.foreach(csv_file_path) do |row|
Post.create({
:name => row[1].scrub,
:address => row[2].scrub,
:city => row[3].scrub,
:michelin_status => row[4].scrub,
:website => row[5].scrub,
:phone => row[6].scrub,
:longitude => row[7].scrub,
:latitude => row[8].scrub,
:inthenews => row[9].scrub,
:google_reviews => row[10].scrub,
})
end
Update
Try to specify the encoding type when you read the CSV file like this:
CSV.foreach(csv_file_path, "r:ISO-8859-1") do |row|
. . .
. . .
end

Answer 2

You can simply convert the original csv file to utf8 with nkf.
$ nkf -w --overwrite db/data.csv