Dump DB to YML Fixtures

dump-db-to-yml-fixture.rake

# https://stackoverflow.com/a/12188782
namespace :db do
  namespace :fixtures do
    desc 'Create YAML test fixtures from data in an existing database. Defaults to development database.  Specify RAILS_ENV=production on command line to override.'
    task :dump => :environment do
      sql  = 'SELECT * FROM %s ORDER BY ID'
      skip_tables = ['schema_migrations']
      # ActiveRecord::Base.establish_connection(Rails.env)
      (ActiveRecord::Base.connection.tables - skip_tables).each do |table_name|
        i = '000'
        data = ActiveRecord::Base.connection.select_all(sql % table_name)
        data = data.inject({}) { |hash, record|
          hash["#{table_name}_#{i.succ!}"] = record
          hash
        }
        # don't create when there is no data
        if data != {}
          File.open("#{Rails.root}/test/fixtures/#{table_name}.yml.new", 'w') do |file|
            file.write data.to_yaml
          end
        end
      end
    end
  end
end