Question

I don’t mean how do I include ActiveRecord, but let me explain.

I want to have a Game with a difficultyLevelID and a DifficultyLevel Object.

In Rails and ActiveRecord (that’s what I am familiar with) these would be tables and I would have the has_many and belongs_to methods and then I could just use the difficultyLevelID to get things, so difficulty level could be Game.difficulty_level.name

If I am just doing a Ruby program with no database and I want to use that relationship, i.e. I want Game to have an ID for difficulty level and the level name itself to be in a difficulties class, how do I do that (create, maintain and query the relationship) just with Ruby so that I can say get the game difficulty level name?

Answer 1

There was no answer in 20 hours so I’ve posted my own.

class Soduko
  attr_accessor :name, :rows, :columns, :difficulty_level
  def initialize // will probably move to parameters as defaults.
    @rows= 9
    @columns= 9
    @name= 'My Soduko'
    @difficulty_level= 'Medium'
  end

  def initial_number_count
    DifficultyLevel.start_with_numbers('Medium')
  end

end

class DifficultyLevel

  def self.start_with_numbers(difficulty_level)
    case difficulty_level
      when 'Easy'
      then 30
      when 'Medium'
      then 20
      when 'Hard'
      then 10
      else 20
    end

  end

end

and of course the tests:

require './soduko'

describe Soduko, '.new' do

  before { @soduko_board  = Soduko.new }

  it "Should allow for a new Board with 9 rows (default) to be created" do
    @soduko_board.rows.should == 9
  end 

  it "Should allow for a new Board with 9 columns (default) to be created" do
    @soduko_board.columns.should == 9
  end 

  it "should have a default difficulty level of 'Medium'" do
    @soduko_board.difficulty_level.should == 'Medium'
  end 

  it "should have 10 initial numbers" do
    @soduko_board.initial_number_count.should == 20
  end 

end

describe DifficultyLevel, '.new' do

  it "should exist" do
    @difficulty_level = DifficultyLevel.new
  end

  # More to be added...

end