Split Seeds.Rb File

Split seeds.rb into multiple sections?

In ./db/seeds/my_module.rb:

module MyModule
  puts "In my_module.rb"
  # add code here
end

In ./db/seeds.rb:

require File.expand_path('../seeds/my_module', __FILE__) # the ../ just removes `seeds.rb` filename from the path which is given by __FILE__

p "In seeds.rb"
# add code here

Split seeds.rb file

Since your seeds.rb file is Ruby, then you can do anything in it you can do in Ruby. Like routes.rb and Gemfile you can get quite creative if required.

Just be sure that you don't do anything so crazy it would actually require some debugging. As long as you keep your actions clear, there should be no confusion. That is, don't use custom helper methods that are defined in some other file that could malfunction and would have to be tracked down by hand. It's probably best to stick to the simplest solution when doing things like this.

How can I split seeds.rb to populated different data in development vs. production?

You just need use the Rails.env to know which environnement you are and switch data.

Is there any way to have multiple seeds.rb files? Any kind of 'versioning' for seed data?

You can re-use the seed task, but make it idempotent.

To make the seed idempotent, simply check for the existence of the condition before executing a command. An example: do you want to create a new admin user?

User.find_or_create_by_username(:username => "admin")

instead of

User.create(:username => "admin")

However, seed should be used to populate your database when the project is created. If you want to perform complex data seeding durin the lifecycle of the app, simply create a new rake task, execute it then remove it.

How to create seeds.rb array?

The reason it didn't work is that you actually passed three arrays with two hashes in each of them.

Pass a single array to the #create method with a single hash for each record you want to create.
For example:

Department.create([{ deptitle: 'dept 1', deptdescription: 'this is the first dept' },
                   { depttitle: 'dept 2', deptdescription: 'this is the second dept' }])

But instead of 'creating an array' you could use a simple loop to create Department records.

10.times do |x|
  Department.create({deptitle: "dept #{x}", deptdescription: "this is the #{x} department"})
end

In my opinion it looks cleaner, takes less place and it is easier to change number of seed records if you need to.

To create a numeral from a number (for "this is the Xst dept" sentence) you could use a humanize gem.

Is there a way to db:seed only one table in Rails?

With below custom rake file, you can have multiple seed files in db/seeds/ folder.

# lib/tasks/custom_seed.rake
# lib/tasks/custom_seed.rake
namespace :db do
  namespace :seed do

    Dir[File.join(Rails.root, 'db', 'seeds', '*.rb')].each do |filename|
      task_name = File.basename(filename, '.rb').intern

      task task_name => :environment do
        load(filename)
      end
    end

    task :all => :environment do
      Dir[File.join(Rails.root, 'db', 'seeds', '*.rb')].sort.each do |filename|
        load(filename)
      end
    end

  end
end

Then, in order to run specific seed file, you can just run

rake db:seed:seed_file_name

To run all the seeds file with order in that db/seeds folder, run below command

rake db:seed:all

Rails Seed Data from file

You need to pass an id to delete.

I assume you want to delete_all

International.delete_all

Rails How to use FactoryGirl in Seeds.rb?

Seeds.rb

require Rails.root.join('spec','helpers.rb')
require 'rubygems'           #so it can load gems
require 'factory_girl_rails' #so it can run in development
seed_data

spec/helpers.rb

def seed_data
  Factory.create(:user)
end

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