Import CSV to existing sqlite database table - ruby-on-rails-3

Question

I've searched all over this forum for solution to the above problem, but everything I tried didn't work. Basically, i have a model Library, with corresponding libraries table in my sqlite3 database. I have a csv file named libraries.csv which contains all the data I want to import into the database.
I tried the method on the second answer on this page but it's still not working. I made sure to create my rake file 'import_libraries.rake in the lib/tasks folder and I also saved the libraries.csv file in that folder but i keep getting this error message:
rake aborted!
Don't know how to build task 'import_libraries' (See
full trace by running task with --trace)
This is the current code I'm using:
require 'csv'
desc "Imports a CSV file into an ActiveRecord table"
task :import, [:filename] => :environment do
CSV.foreach('libraries.csv', :headers => true) do |row|
Library.create!(row.to_hash)
end
end
But when I run bundle exec rake import_libraries, I get the error message above.
Is there anything I am doing wrong? i would appreciate your help guys. Thanks
EDIT
I renamed the rake file from import_libraries.rake to just import.rake On running bundle exec rake import, the error message i now get is:
rake aborted! invalid byte sequence in UTF-8
C:/Users/username/rails_app_name/lib/tasks/import.rake:4:in `block in
' Tasks: TOP => import (See full trace by running task
with --trace)

Answer 1

Based on the error you're getting and the task you have defined, you should be calling:
bundle exec rake import #=> you're currently calling import_libraries which indeed doesn't exist
With rake you call a task based on the name you give to the tasks, not on the name of the file (remember you can have many task inside each of those rake files).

Answer 2

I finally solved the problem by using this code:
namespace :csv do
desc "Import CSV Data"
task :import => :environment do
require 'csv'
csv_file_path = 'lib/tasks/libraries.csv'
CSV.foreach(csv_file_path, headers: true) do |row|
row = Library.create!({
:column_name1 => row[0],
:column_name2 => row[1],
:column_name3 => row[2],
.
.
:last_column => row[6]
})
puts "Success!"
end
end
end