Sequel - From CSV

Gem Version Build Status Inline docs

Provides a simple way to seed and synchronize table data using CSV files.

Requires PostgreSQL 9.5 or newer.

Documentation also available at


$ gem install sequel-from_csv

Or add this line to your application's Gemfile then execute bundle install:

gem 'sequel-from_csv'


To seed data for an individual model:

# Load the plugin
Sequel::Model.plugin :from_csv

# Sync an individual model (removing rows in the table not found in the CSV)
class Country < Sequel::Model; end;
Country.seed_from_csv "app/models/country.csv", delete_missing: true

To seed all models with CSV files present:

# Load the extension
Sequel::Database.extension :from_csv

# Sync all models with CSV files recursively, updating PostgreSQL's primary key sequences
DB.seed_from_csv "app/models/", resequence: true


Argument Default Description
:delete_missing false whether to remove rows from the table that were not found in the CSV file
:resequence false whether to update the primary key's sequence to reflect the max primary key value


After checking out the repo, run bin/setup to install dependencies. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at