JezK

Edit File: eager_load_nested_include_test.rb

require 'cases/helper'

class ShapeExpression < ActiveRecord::Base
  belongs_to :shape, :polymorphic => true
  belongs_to :paint, :polymorphic => true
end

class Circle < ActiveRecord::Base
  has_many :shape_expressions, :as => :shape
end
class Square < ActiveRecord::Base
  has_many :shape_expressions, :as => :shape
end
class Triangle < ActiveRecord::Base
  has_many :shape_expressions, :as => :shape
end
class PaintColor  < ActiveRecord::Base
  has_many   :shape_expressions, :as => :paint
  belongs_to :non_poly, :foreign_key => "non_poly_one_id", :class_name => "NonPolyOne"
end
class PaintTexture < ActiveRecord::Base
  has_many   :shape_expressions, :as => :paint
  belongs_to :non_poly, :foreign_key => "non_poly_two_id", :class_name => "NonPolyTwo"
end
class NonPolyOne < ActiveRecord::Base
  has_many :paint_colors
end
class NonPolyTwo < ActiveRecord::Base
  has_many :paint_textures
end

class EagerLoadPolyAssocsTest < ActiveRecord::TestCase
  NUM_SIMPLE_OBJS = 50
  NUM_SHAPE_EXPRESSIONS = 100

def setup
    generate_test_object_graphs
  end
  
  def teardown
    [Circle, Square, Triangle, PaintColor, PaintTexture, 
     ShapeExpression, NonPolyOne, NonPolyTwo].each do |c|
      c.delete_all
    end
    
  end

# meant to be supplied as an ID, never returns 0
  def rand_simple
    val = (NUM_SIMPLE_OBJS * rand).round
    val == 0 ? 1 : val
  end

def generate_test_object_graphs
    1.upto(NUM_SIMPLE_OBJS) do
      [Circle, Square, Triangle, NonPolyOne, NonPolyTwo].map(&:create!)
    end
    1.upto(NUM_SIMPLE_OBJS) do |i|
      PaintColor.create!(:non_poly_one_id => rand_simple)
      PaintTexture.create!(:non_poly_two_id => rand_simple)
    end
    1.upto(NUM_SHAPE_EXPRESSIONS) do |i|
      ShapeExpression.create!(:shape_type => [Circle, Square, Triangle].rand.to_s, :shape_id => rand_simple,
                              :paint_type => [PaintColor, PaintTexture].rand.to_s, :paint_id => rand_simple)
    end
  end

def test_include_query
    res = 0
    res = ShapeExpression.find :all, :include => [ :shape, { :paint => :non_poly } ]
    assert_equal NUM_SHAPE_EXPRESSIONS, res.size
    assert_queries(0) do
      res.each do |se|
        assert_not_nil se.paint.non_poly, "this is the association that was loading incorrectly before the change"
        assert_not_nil se.shape, "just making sure other associations still work"
      end
    end
  end
end

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