Sower

A Ruby gem to simplify Seed data creation for Rails applications.

Installation

Add it to your Gemfile:

gem 'rolemodel_sower'

Run the following command to install it:

bundle install

Run the generator:

rails generate rolemodel_sower:install

Usage

Creating Seed Data

Seed data is created by placing files in the db/rolemodel_sower_data directory. The files should be named after the model they are creating data for. For example, a file named users.json would create seed data for the User model.

db/rolemodel_sower_data/users.json

The seed data directory can be configured in the initializer generated by the install generator.

RolemodelSower.setup do |config|
  config.data_path = 'db/seed_data'
end

Translating Seed Data

You will need to define a rolemodel_sower file to take the data parsed from your seed data and create the records in your database.

Sower files should be created in app/seeds/rolemodel_sower. The files should be named after the model they are creating data for. For example, a file named user.rb would create seed data for the User model.

In db/rolemodel_sower_data/users.json

[
  {
    "first_name": "John",
    "last_name": "Doe",
    "email": "john.doe@example.com"
  },
  {
    "first_name": "Jane",
    "last_name": "Doe",
    "email": "jane.doe@example.com"
  }
]

In app/seeds/rolemodel_sower/user.rb

# frozen_string_literal: true

module RolemodelSower
  class User < RolemodelSower::Base
    def load!
      ::User.find_or_create_by!(
        first_name: data[:first_name],
        last_name: data[:last_name],
        email: data[:last_name]
      )
    end
  end
end

Loading Seed Data

Seeds can be generated by calling the seed! method on RolemodelSower.

It takes one or more symbol arguments that correspond to sets of seed data and runs them in the order passed.

RolemodelSower.seed!(
  :users,
  :organizations,
  :facilities
)

If you want to add conditions to each run, you can separate out each call to seed.

RolemodelSower.seed!(:users) if my_condition
RolemodelSower.seed!(:organizations) if other_condition
RolemodelSower.seed!(:facilities) if another_condition

Adapters

RolemodelSower defaults to loading yml files, but can be configured to load json, csv, or tsv files. This can be configured in config/initializers/rolemodel_sower.rb. (Can be generated by running rails generate rolemodel_sower:install)

RolemodelSower.setup do |config|
  config.adapter = :json
end

You can also specify the adapter when calling seed!. This will override the default adapter or what is set in the initializer.

RolemodelSower.seed!(
  { users: :csv },
  :organizations,
  { facilities: :json }
)

RolemodelSower.seed!({ users: :csv }) if my_condition
RolemodelSower.seed!(:organizations) if other_condition
RolemodelSower.seed!({ facilities: :json }) if another_condition

Development

To build the gem locally, run: gem build rolemodel_sower.gemspec

To test the gem locally, use the path option in your Gemfile:

gem 'rolemodel_sower', path: '../rolemodel_sower'

Publishing

Make sure you are an owner of the gem.

You also need to be signed in to rubygmes by running:

gem signin

To publish, run:

gem push rolemodel_sower-{major.minor.patch}.gem