Database_cleaner gem isn't cleaning - ruby-on-rails

Question

I'm using Mongoid as my database and have configured my spec_helper.rb file as instructed on other Stackoverflow questions, however I'm still getting an error that the Object exists on subsequent tests. So, database_cleaner isn't cleaning my test db as it should.
Here is my spec_helper.rb:
ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'rails/mongoid'
require 'mongoid-rspec'
require 'database_cleaner'
Mongoid.load!(Rails.root.join("config", "mongoid.yml"))
# Load support files
Dir["#{File.dirname(__FILE__)}/support/**/*.rb"].each { |f| require f }
RSpec.configure do |config|
config.mock_with :rspec
#config.use_transactional_fixtures = true
config.infer_base_class_for_anonymous_controllers = false
config.order = "random"
config.before(:suite) do
DatabaseCleaner[:mongoid].strategy = :truncation
DatabaseCleaner[:mongoid].clean_with(:truncation)
end
config.before(:each) do
DatabaseCleaner.start
end
config.after(:each) do
DatabaseCleaner.clean
end
end
And my rspec test file is simple:
describe Stock do
it "should get created with only name and symbol" do
stock = Stock.create(name: "Netflix", symbol: "NFLX")
expect(stock.errors.full_messages).to eq []
end
end
The output I'm getting is fine on first run (after I manually reset the db) with rake db:reset RAILS_ENV=test however every run after that I am getting:
Failures:
1) Stock should get created with only name and symbol
Failure/Error: expect(stock.errors.full_messages).to eq []
expected: []
got: ["Symbol is already taken"]
(compared using ==)
# ./spec/models/stock_spec.rb:6:in `block (2 levels) in <top (required)>'
What am I missing?

Answer 1

Well, after alot more reading, I've come to determine that database_cleaner and Mongo aren't playing well together. While it's probably not the cleanest solution, it is simple:
In my spec_helper.rb file, I ended up adding this line to the RSpec.configure block:
config.after(:each) do
Mongoid.purge!
end