CsvMapper is a small library intended to simplify the common steps involved with importing CSV files to a usable form in Ruby. CsvMapper is compatible with recent 1.8 versions of Ruby as well as Ruby 1.9+
The following example will import a CSV file to an Array of Struct instances.
First Name,Last Name,Age John,Doe,27 Jane,Doe,26 Bat,Man,52 ...etc...
results = CsvMapper.import_csv('/path/to/file.csv') do start_at_row 1 [first_name, last_name, age] end results.first.first_name # John results.first.last_name # Doe results.first.age # 27
results = CsvMapper.import_csv('/path/to/file.csv') do read_attributes_from_file end results.first.first_name # John results.first.last_name # Doe results.first.age # 27
Although CsvMapper has no dependency on ActiveRecord; it’s easy to import a CSV file to ActiveRecord models and save them.
# Define an ActiveRecord model
class Person < ActiveRecord::Base; end
results = CsvMapper.import_csv('/path/to/file.csv') do
map_to Person # Map to the Person ActiveRecord class (defined above) instead of the default Struct.
after_row lambda{|row, person| person.save } # Call this lambda and save each record after it's parsed.
start_at_row 1 [first_name, last_name, age] end
See CsvMapper for a more detailed description
FasterCSV on pre 1.9 versions of Ruby
-
sudo gem install csv-mapper
-
Fork the project.
-
Make your feature addition or bug fix.
-
Add tests for it. This is important so I don’t break it in a future version unintentionally.
-
Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)
-
Send me a pull request. Bonus points for topic branches.
Copyright © 2009 Luke Pillow. See LICENSE for details.