rails--rails/activerecord/test/associations_go_eager_test.rb

require 'abstract_unit'
require 'fixtures/post'
require 'fixtures/comment'
require 'fixtures/author'
require 'fixtures/category'
require 'fixtures/company'

class EagerAssociationTest < Test::Unit::TestCase
  fixtures :posts, :comments, :authors, :categories, :categories_posts,
            :companies, :accounts

  def test_loading_with_one_association
    posts = Post.find(:all, :include => :comments)
    post = posts.find { |p| p.id == 1 }
    assert_equal 2, post.comments.size
    assert post.comments.include?(comments(:greetings))

    post = Post.find(:first, :include => :comments, :conditions => "posts.title = 'Welcome to the weblog'")
    assert_equal 2, post.comments.size
    assert post.comments.include?(comments(:greetings))
  end

  def test_loading_conditions_with_or
    posts = authors(:david).posts.find(:all, :include => :comments, :conditions => "comments.body like 'Normal%' OR comments.#{QUOTED_TYPE} = 'SpecialComment'")
    assert_nil posts.detect { |p| p.author_id != authors(:david).id },
      "expected to find only david's posts"
  end

  def test_with_ordering
    list = Post.find(:all, :include => :comments, :order => "posts.id DESC")
    [:eager_other, :sti_habtm, :sti_post_and_comments, :sti_comments,
     :authorless, :thinking, :welcome
    ].each_with_index do |post, index|
      assert_equal posts(post), list[index]
    end
  end

  def test_loading_with_multiple_associations
    posts = Post.find(:all, :include => [ :comments, :author, :categories ], :order => "posts.id")
    assert_equal 2, posts.first.comments.size
    assert_equal 2, posts.first.categories.size
    assert posts.first.comments.include?(comments(:greetings))
  end

  def test_loading_from_an_association
    posts = authors(:david).posts.find(:all, :include => :comments, :order => "posts.id")
    assert_equal 2, posts.first.comments.size
  end

  def test_loading_with_no_associations
    assert_nil Post.find(posts(:authorless).id, :include => :author).author
  end

  def test_eager_association_loading_with_belongs_to
    comments = Comment.find(:all, :include => :post)
    assert_equal 10, comments.length
    titles = comments.map { |c| c.post.title }
    assert titles.include?(posts(:welcome).title)
    assert titles.include?(posts(:sti_post_and_comments).title)
  end
  
  def test_eager_association_loading_with_belongs_to_and_limit
    comments = Comment.find(:all, :include => :post, :limit => 5, :order => 'comments.id')
    assert_equal 5, comments.length
    assert_equal [1,2,3,5,6], comments.collect { |c| c.id }
  end

  def test_eager_association_loading_with_belongs_to_and_limit_and_conditions
    comments = Comment.find(:all, :include => :post, :conditions => 'post_id = 4', :limit => 3, :order => 'comments.id')
    assert_equal 3, comments.length
    assert_equal [5,6,7], comments.collect { |c| c.id }
  end

  def test_eager_association_loading_with_belongs_to_and_limit_and_offset
    comments = Comment.find(:all, :include => :post, :limit => 3, :offset => 2, :order => 'comments.id')
    assert_equal 3, comments.length
    assert_equal [3,5,6], comments.collect { |c| c.id }
  end

  def test_eager_association_loading_with_belongs_to_and_limit_and_offset_and_conditions
    comments = Comment.find(:all, :include => :post, :conditions => 'post_id = 4', :limit => 3, :offset => 1, :order => 'comments.id')
    assert_equal 3, comments.length
    assert_equal [6,7,8], comments.collect { |c| c.id }
  end
  
  def test_eager_association_loading_with_belongs_to_and_limit_and_multiple_associations
    posts = Post.find(:all, :include => [:author, :very_special_comment], :limit => 1)
    assert_equal 1, posts.length
    assert_equal [4], posts.collect { |p| p.id }
  end
  
  def test_eager_association_loading_with_belongs_to_and_limit_and_offset_and_multiple_associations
    posts = Post.find(:all, :include => [:author, :very_special_comment], :limit => 1, :offset => 1)
    assert_equal 0, posts.length
    assert_equal [], posts
  end
  
  def test_eager_with_has_many_and_limit
    posts = Post.find(:all, :order => 'posts.id asc', :include => [ :author, :comments ], :limit => 2)
    assert_equal 2, posts.size
    assert_equal 3, posts.inject(0) { |sum, post| sum += post.comments.size }
  end

  def test_eager_with_has_many_and_limit_with_no_results
    posts = Post.find(:all, :include => [ :author, :comments ], :limit => 2, :conditions => "posts.title = 'magic forest'")
    assert_equal 0, posts.size
  end

  def test_eager_with_has_and_belongs_to_many_and_limit
    posts = Post.find(:all, :include => :categories, :order => "posts.id", :limit => 3)
    assert_equal 3, posts.size
    assert_equal 2, posts[0].categories.size
    assert_equal 1, posts[1].categories.size
    assert_equal 0, posts[2].categories.size
    assert posts[0].categories.include?(categories(:technology))
    assert posts[1].categories.include?(categories(:general))
  end

  def test_eager_with_has_many_and_limit_and_conditions_on_the_eagers
    assert_raises(ArgumentError) do
      posts = authors(:david).posts.find(:all, 
        :include    => :comments, 
        :conditions => "comments.body like 'Normal%' OR comments.#{QUOTED_TYPE}= 'SpecialComment'",
        :limit      => 2
      )
    end
  end

  def test_eager_association_loading_with_habtm
    posts = Post.find(:all, :include => :categories, :order => "posts.id")
    assert_equal 2, posts[0].categories.size
    assert_equal 1, posts[1].categories.size
    assert_equal 0, posts[2].categories.size
    assert posts[0].categories.include?(categories(:technology))
    assert posts[1].categories.include?(categories(:general))
  end

  def test_eager_with_inheritance
    posts = SpecialPost.find(:all, :include => [ :comments ])
  end

  def test_eager_has_one_with_association_inheritance
    post = Post.find(4, :include => [ :very_special_comment ])
    assert_equal "VerySpecialComment", post.very_special_comment.class.to_s
  end

  def test_eager_has_many_with_association_inheritance
    post = Post.find(4, :include => [ :special_comments ])
    post.special_comments.each do |special_comment|
      assert_equal "SpecialComment", special_comment.class.to_s
    end
  end

  def test_eager_habtm_with_association_inheritance
    post = Post.find(6, :include => [ :special_categories ])
    assert_equal 1, post.special_categories.size
    post.special_categories.each do |special_category|
      assert_equal "SpecialCategory", special_category.class.to_s
    end
  end

  def test_eager_with_has_one_dependent_does_not_destroy_dependent
    assert_not_nil companies(:first_firm).account
    f = Firm.find(:first, :include => :account,
            :conditions => ["companies.name = ?", "37signals"])
    assert_not_nil f.account
    assert_equal companies(:first_firm, :reload).account, f.account
  end

  def test_eager_with_invalid_association_reference
    assert_raises(ActiveRecord::ConfigurationError, "Association was not found; perhaps you misspelled it?  You specified :include => :monkeys") {
      post = Post.find(6, :include=> :monkeys )
    }
    assert_raises(ActiveRecord::ConfigurationError, "Association was not found; perhaps you misspelled it?  You specified :include => :monkeys") {
      post = Post.find(6, :include=>[ :monkeys ])
    }
    assert_raises(ActiveRecord::ConfigurationError, "Association was not found; perhaps you misspelled it?  You specified :include => :monkeys") {
      post = Post.find(6, :include=>[ 'monkeys' ])
    }
    assert_raises(ActiveRecord::ConfigurationError, "Association was not found; perhaps you misspelled it?  You specified :include => :monkeys, :elephants") {
      post = Post.find(6, :include=>[ :monkeys, :elephants ])
    }
  end

  def test_eager_with_valid_association_as_string_not_symbol
    assert_nothing_raised { Post.find(:all, :include => 'comments') }
  end

  def test_preconfigured_includes_with_belongs_to
    author = posts(:welcome).author_with_posts
    assert_equal 5, author.posts.size
  end

  def test_preconfigured_includes_with_has_one
    comment = posts(:sti_comments).very_special_comment_with_post
    assert_equal posts(:sti_comments), comment.post
  end

  def test_preconfigured_includes_with_has_many
    posts = authors(:david).posts_with_comments
    assert_equal 2, posts.first.comments.size
  end

  def test_preconfigured_includes_with_habtm
    posts = authors(:david).posts_with_categories
    assert_equal 2, posts.first.categories.size
  end

  def test_preconfigured_includes_with_has_many_and_habtm
    posts = authors(:david).posts_with_comments_and_categories
    assert_equal 2, posts.first.comments.size
    assert_equal 2, posts.first.categories.size
  end
end