Test Environment

In test environment you will most likely want to clean the database between test runs to keep tests completely isolated. This can be achieved like so

module DynamoidReset
  def self.all
    Dynamoid.adapter.list_tables.each do |table|
      # Only delete tables in our namespace
      if table =~ /^#{Dynamoid::Config.namespace}/
        Dynamoid.adapter.delete_table(table)
      end
    end
    Dynamoid.adapter.tables.clear
    # Recreate all tables to avoid unexpected errors
    Dynamoid.included_models.each { |m| m.create_table(sync: true) }
  end
end

# Reduce noise in test output
Dynamoid.logger.level = Logger::FATAL

If you’re using RSpec you can invoke the above like so:

RSpec.configure do |config|
  config.before(:each) do
    DynamoidReset.all
  end
end

In addition, the first test for each model may fail if the relevant models are not included in included_models. This can be fixed by adding this line before the DynamoidReset module:

Dir[File.join(Dynamoid::Config.models_dir, '**/*.rb')].sort.each { |file| require file }

Note that this will require all models in your models folder - you can also explicitly require only certain models if you would prefer to.

In Rails, you may also want to ensure you do not delete non-test data accidentally by adding the following to your test environment setup:

raise "Tests should be run in 'test' environment only" if Rails.env != 'test'

Dynamoid.configure do |config|
  config.namespace = "#{Rails.application.railtie_name}_#{Rails.env}"
end