Retrieving Collection from mLab

Question

I am using a MongoDB on mLab to store a basic collection of boardgames which I wish to show in my Ruby app. I have completed a tutorial that uses Mongoid to implement this locally, but so far I can't get it working with the mLab instance of the DB.

I add this to my mongoid.yml file

development:
  clients:
    default:
      uri: 'mongodb://user:[email protected]:41232/boardgame_banter'

The other options automatically generated in the config file, I have left blank (as default).

I want to understand these 2 lines from the Terminal:

MONGODB | ds141232-a.mlab.com:41232 | boardgame_banter.find | STARTED | {"find"=>"boardgames", "filter"=>{}}
MONGODB | ds141232-a.mlab.com:41232 | boardgame_banter.find | SUCCEEDED | 0.037816999999999996s

I get no errors, but also no documents returned and the generated index.html is blank...

Can anyone explain the first of the two lines MONGODB | ... to me, or at least confirm if my assumptions below are correct? Particularly the last part of the chain, is this telling me that the filtered results are empty?

MONGODB | <<hostname>> | <<database.find()>> | <<STATUS>> | {"find"=><<collection>>, "filter"=>{<<no results??>>}}

UPDATE after suggestion from @tfogo in the comments
In my controller:

  # GET /boardgames
  # GET /boardgames.json
  def index
    @boardgames = Boardgame.all
    @log = Boardgame.all.to_a
    puts "LOG: #{@log}"
  end

Which produces the following empty Log statement in the console:

    Started GET "/boardgames" for 127.0.0.1 at 2018-03-02 11:25:00 +0100
Processing by BoardgamesController#index as HTML
D, [2018-03-02T11:25:00.186878 #12983] DEBUG -- : MONGODB | ds141232-a.mlab.com:41232 | boardgame_banter.find | STARTED | {"find"=>"boardgames", "filter"=>{}}
D, [2018-03-02T11:25:00.223330 #12983] DEBUG -- : MONGODB | ds141232-a.mlab.com:41232 | boardgame_banter.find | SUCCEEDED | 0.035911000000000005s
LOG: [#<Boardgame _id: 5a984b439de90b3769420f2d, name: nil, rating: nil, minplayer: nil, maxplayer: nil, duration: nil, owner: nil>]
  Rendering boardgames/index.html.erb within layouts/application
D, [2018-03-02T11:25:00.235908 #12983] DEBUG -- : MONGODB | ds141232-a.mlab.com:41232 | boardgame_banter.find | STARTED | {"find"=>"boardgames", "filter"=>{}}
D, [2018-03-02T11:25:00.274734 #12983] DEBUG -- : MONGODB | ds141232-a.mlab.com:41232 | boardgame_banter.find | SUCCEEDED | 0.038311s
  Rendered boardgames/index.html.erb within layouts/application (42.3ms)
Completed 200 OK in 127ms (Views: 76.9ms)