importing data from csv into rails application - ruby-on-rails

Question

I am trying to import data from CSV into the database using Classes so that I can easily write Test Case for the csv import rake task I created
However, my solution does not work.
And I also feel:
It doesn't make sense
Aside feeling its not a good solution that connotes Ruby mastery, it doesn't work.
Here is what I came up with in my engines/csv_importer/lib/tasks/csv_import.rake
require 'open-uri'
require 'csv'
namespace :csv_import do
desc 'Import users from csv'
task users: :environment do
WebImport.new(url: 'http://blablabla.com/details/people.csv').call.answers
end
end
class WebImport
def initialize(url)
#csv_string = url
end
def call
CSV.parse(#csv_string, headers: true, header_converters: :symbol) do |row|
next unless row[:name].present? && row[:email_address].present?
end
CsvImporter::User.create row.to_h
end
def self.answers
user = []
counter = 0
duplicate_counter = 0
user.persisted? ? counter + 1 : duplicate_counter + 1
p "Email duplicate record: #{user.email_address} - #{user.errors.full_messages.join(',')}" if user.errors.any?
p "Imported #{counter} users, #{duplicate_counter} duplicate rows ain't added in total"
end
end
Error when I run rake csv_import:users
$ rake csv_import:users
rake aborted!
NoMethodError: private method `gets' called for {:url=>"http://blablabla.com/details/people.csv"}:Hash
How do I make this work and write TEST for this at the long run?

Answer 1

You are getting this error because you are passing a hash to CSV.parse while that method accepts a string.
To fix that you need to change argument from a hash to a string: WebImport.new('http://blablabla.com/details/people.csv') and read a remote CSV file before passing it to CSV.parse, for example: CSV.parse(open(url)).

Answer 2

You can try to use
rake db:seed
to import the data to your database using seed file as
require 'csv'
puts "Importing data..."
CSV.foreach(Rails.root.join("file_name.csv"), headers: true) do |row|
Model_name.create! do |model_name|
model_name.name = row[0]
model_name.email_address = row[1]
end
end
csv file should be in your project root folder