Issue on integrating Database cleaner gem in Ruby Rspec automation - ruby-on-rails

Question

I am getting the following error on executing the code.
No known ORM was detected! Is ActiveRecord, DataMapper, Sequel, MongoMapper, Mongoid, Moped, or CouchPotato, Redis or Ohm loaded? (DatabaseCleaner::NoORMDetected)
Can anyone pls suggest a solution for this.
spec_helper.rb:
ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'capybara/rspec'
require 'database_cleaner'
DatabaseCleaner.strategy = :truncation
# Requires supporting ruby files with custom matchers and macros, etc,
# in spec/support/ and its subdirectories.
Dir[Rails.root.join("spec/support/database_cleaner.rb")].each {|f| require f}
RSpec.configure do |config|
config.mock_with :mocha
config.before(:each) do
DatabaseCleaner.clean
#Mongoid.master.collections.select {|c| c.name !~ /system/ }.each(&:drop) # transactional fixtures hack for mongo
end
config.expect_with :rspec do |c|
c.syntax = [:should, :expect]
end
config.mock_with :rspec do |mocks|
mocks.verify_partial_doubles = true
end
config.color = true
config.use_transactional_fixtures = false
end

Answer 1

Hope this helps. Here is how I have my (working) database cleaner configured:
I have no database_cleaner.rb. I configure everything in rails_helper.rb. This shouldn't matter, but you may want to try below code and see if it works before splitting it out.
Notice that I have DatabaseCleaner.strategy = :truncation in a before block
Here is the relevant part of my rails_helper.rb
RSpec.configure do |config|
config.use_transactional_fixtures = false
config.before(:suite) do
DatabaseCleaner.clean_with :truncation
end
config.before(:each) do |example|
if example.metadata[:js]
DatabaseCleaner.strategy = :truncation
else
DatabaseCleaner.strategy = :transaction
end
DatabaseCleaner.start
end
config.after(:each) do
DatabaseCleaner.clean
end
end

Answer 2

Add the following to your RSpec.configure block:
config.before(:suite) do
DatabaseCleaner.strategy = :transaction
DatabaseCleaner.clean_with(:truncation)
end
Also, to specify particular ORM, you can do this:
#How to specify particular orms
DatabaseCleaner[:active_record].strategy = :transaction
DatabaseCleaner[:mongo_mapper].strategy = :truncation
See this for more information.