require "cases/helper" require "models/post" require "models/tagging" require "models/tag" require "models/comment" require "models/author" require "models/essay" require "models/category" require "models/company" require "models/person" require "models/reader" require "models/owner" require "models/pet" require "models/reference" require "models/job" require "models/subscriber" require "models/subscription" require "models/book" require "models/developer" require "models/computer" require "models/project" require "models/member" require "models/membership" require "models/club" require "models/categorization" require "models/sponsor" require "models/mentor" require "models/contract" class EagerAssociationTest < ActiveRecord::TestCase fixtures :posts, :comments, :authors, :essays, :author_addresses, :categories, :categories_posts, :companies, :accounts, :tags, :taggings, :people, :readers, :categorizations, :owners, :pets, :author_favorites, :jobs, :references, :subscribers, :subscriptions, :books, :developers, :projects, :developers_projects, :members, :memberships, :clubs, :sponsors def test_eager_with_has_one_through_join_model_with_conditions_on_the_through member = Member.all.merge!(includes: :favourite_club).find(members(:some_other_guy).id) assert_nil member.favourite_club end def test_loading_with_one_association posts = Post.all.merge!(includes: :comments).to_a post = posts.find { |p| p.id == 1 } assert_equal 2, post.comments.size assert_includes post.comments, comments(:greetings) post = Post.all.merge!(includes: :comments, where: "posts.title = 'Welcome to the weblog'").first assert_equal 2, post.comments.size assert_includes post.comments, comments(:greetings) posts = Post.all.merge!(includes: :last_comment).to_a post = posts.find { |p| p.id == 1 } assert_equal Post.find(1).last_comment, post.last_comment end def test_loading_with_one_association_with_non_preload posts = Post.all.merge!(includes: :last_comment, order: "comments.id DESC").to_a post = posts.find { |p| p.id == 1 } assert_equal Post.find(1).last_comment, post.last_comment end def test_loading_conditions_with_or posts = authors(:david).posts.references(:comments).merge( includes: :comments, where: "comments.body like 'Normal%' OR comments.#{QUOTED_TYPE} = 'SpecialComment'" ).to_a 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.all.merge!(includes: :comments, order: "posts.id DESC").to_a [:other_by_mary, :other_by_bob, :misc_by_mary, :misc_by_bob, :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_has_many_through_with_order authors = Author.includes(:favorite_authors).to_a assert authors.count > 0 assert_no_queries { authors.map(&:favorite_authors) } end def test_eager_loaded_has_one_association_with_references_does_not_run_additional_queries Post.update_all(author_id: nil) authors = Author.includes(:post).references(:post).to_a assert authors.count > 0 assert_no_queries { authors.map(&:post) } end def test_calculate_with_string_in_from_and_eager_loading assert_equal 10, Post.from("authors, posts").eager_load(:comments).where("posts.author_id = authors.id").count end def test_with_two_tables_in_from_without_getting_double_quoted posts = Post.select("posts.*").from("authors, posts").eager_load(:comments).where("posts.author_id = authors.id").order("posts.id").to_a assert_equal 2, posts.first.comments.size end def test_loading_with_multiple_associations posts = Post.all.merge!(includes: [ :comments, :author, :categories ], order: "posts.id").to_a assert_equal 2, posts.first.comments.size assert_equal 2, posts.first.categories.size assert_includes posts.first.comments, comments(:greetings) end def test_duplicate_middle_objects comments = Comment.all.merge!(where: "post_id = 1", includes: [post: :author]).to_a assert_no_queries do comments.each { |comment| comment.post.author.name } end end def test_preloading_has_many_in_multiple_queries_with_more_ids_than_database_can_handle assert_called(Comment.connection, :in_clause_length, returns: 5) do posts = Post.all.merge!(includes: :comments).to_a assert_equal 11, posts.size end end def test_preloading_has_many_in_one_queries_when_database_has_no_limit_on_ids_it_can_handle assert_called(Comment.connection, :in_clause_length, returns: nil) do posts = Post.all.merge!(includes: :comments).to_a assert_equal 11, posts.size end end def test_preloading_habtm_in_multiple_queries_with_more_ids_than_database_can_handle assert_called(Comment.connection, :in_clause_length, times: 2, returns: 5) do posts = Post.all.merge!(includes: :categories).to_a assert_equal 11, posts.size end end def test_preloading_habtm_in_one_queries_when_database_has_no_limit_on_ids_it_can_handle assert_called(Comment.connection, :in_clause_length, times: 2, returns: nil) do posts = Post.all.merge!(includes: :categories).to_a assert_equal 11, posts.size end end def test_load_associated_records_in_one_query_when_adapter_has_no_limit assert_called(Comment.connection, :in_clause_length, returns: nil) do post = posts(:welcome) assert_queries(2) do Post.includes(:comments).where(id: post.id).to_a end end end def test_load_associated_records_in_several_queries_when_many_ids_passed assert_called(Comment.connection, :in_clause_length, returns: 1) do post1, post2 = posts(:welcome), posts(:thinking) assert_queries(3) do Post.includes(:comments).where(id: [post1.id, post2.id]).to_a end end end def test_load_associated_records_in_one_query_when_a_few_ids_passed assert_called(Comment.connection, :in_clause_length, returns: 3) do post = posts(:welcome) assert_queries(2) do Post.includes(:comments).where(id: post.id).to_a end end end def test_including_duplicate_objects_from_belongs_to popular_post = Post.create!(title: "foo", body: "I like cars!") comment = popular_post.comments.create!(body: "lol") popular_post.readers.create!(person: people(:michael)) popular_post.readers.create!(person: people(:david)) readers = Reader.all.merge!(where: ["post_id = ?", popular_post.id], includes: { post: :comments }).to_a readers.each do |reader| assert_equal [comment], reader.post.comments end end def test_including_duplicate_objects_from_has_many car_post = Post.create!(title: "foo", body: "I like cars!") car_post.categories << categories(:general) car_post.categories << categories(:technology) comment = car_post.comments.create!(body: "hmm") categories = Category.all.merge!(where: { "posts.id" => car_post.id }, includes: { posts: :comments }).to_a categories.each do |category| assert_equal [comment], category.posts[0].comments end end def test_associations_loaded_for_all_records post = Post.create!(title: "foo", body: "I like cars!") SpecialComment.create!(body: "Come on!", post: post) first_category = Category.create! name: "First!", posts: [post] second_category = Category.create! name: "Second!", posts: [post] categories = Category.where(id: [first_category.id, second_category.id]).includes(posts: :special_comments) assert_equal categories.map { |category| category.posts.first.special_comments.loaded? }, [true, true] end def test_finding_with_includes_on_has_many_association_with_same_include_includes_only_once author_id = authors(:david).id author = assert_queries(3) { Author.all.merge!(includes: { posts_with_comments: :comments }).find(author_id) } # find the author, then find the posts, then find the comments author.posts_with_comments.each do |post_with_comments| assert_equal post_with_comments.comments.length, post_with_comments.comments.count assert_nil post_with_comments.comments.to_a.uniq! end end def test_finding_with_includes_on_has_one_association_with_same_include_includes_only_once author = authors(:david) post = author.post_about_thinking_with_last_comment last_comment = post.last_comment author = assert_queries(3) { Author.all.merge!(includes: { post_about_thinking_with_last_comment: :last_comment }).find(author.id) } # find the author, then find the posts, then find the comments assert_no_queries do assert_equal post, author.post_about_thinking_with_last_comment assert_equal last_comment, author.post_about_thinking_with_last_comment.last_comment end end def test_finding_with_includes_on_belongs_to_association_with_same_include_includes_only_once post = posts(:welcome) author = post.author author_address = author.author_address post = assert_queries(3) { Post.all.merge!(includes: { author_with_address: :author_address }).find(post.id) } # find the post, then find the author, then find the address assert_no_queries do assert_equal author, post.author_with_address assert_equal author_address, post.author_with_address.author_address end end def test_finding_with_includes_on_null_belongs_to_association_with_same_include_includes_only_once post = posts(:welcome) post.update!(author: nil) post = assert_queries(1) { Post.all.merge!(includes: { author_with_address: :author_address }).find(post.id) } # find the post, then find the author which is null so no query for the author or address assert_no_queries do assert_nil post.author_with_address end end def test_finding_with_includes_on_null_belongs_to_polymorphic_association sponsor = sponsors(:moustache_club_sponsor_for_groucho) sponsor.update!(sponsorable: nil) sponsor = assert_queries(1) { Sponsor.all.merge!(includes: :sponsorable).find(sponsor.id) } assert_no_queries do assert_nil sponsor.sponsorable end end def test_finding_with_includes_on_empty_polymorphic_type_column sponsor = sponsors(:moustache_club_sponsor_for_groucho) sponsor.update!(sponsorable_type: "", sponsorable_id: nil) # sponsorable_type column might be declared NOT NULL sponsor = assert_queries(1) do assert_nothing_raised { Sponsor.all.merge!(includes: :sponsorable).find(sponsor.id) } end assert_no_queries do assert_nil sponsor.sponsorable end end def test_loading_from_an_association posts = authors(:david).posts.merge(includes: :comments, order: "posts.id").to_a assert_equal 2, posts.first.comments.size end def test_loading_from_an_association_that_has_a_hash_of_conditions assert_nothing_raised do Author.all.merge!(includes: :hello_posts_with_hash_conditions).to_a end assert !Author.all.merge!(includes: :hello_posts_with_hash_conditions).find(authors(:david).id).hello_posts.empty? end def test_loading_with_no_associations assert_nil Post.all.merge!(includes: :author).find(posts(:authorless).id).author end # Regression test for 21c75e5 def test_nested_loading_does_not_raise_exception_when_association_does_not_exist assert_nothing_raised do Post.all.merge!(includes: { author: :author_addresss }).find(posts(:authorless).id) end end def test_three_level_nested_preloading_does_not_raise_exception_when_association_does_not_exist post_id = Comment.where(author_id: nil).where.not(post_id: nil).first.post_id assert_nothing_raised do Post.preload(comments: [{ author: :essays }]).find(post_id) end end def test_nested_loading_through_has_one_association aa = AuthorAddress.all.merge!(includes: { author: :posts }).find(author_addresses(:david_address).id) assert_equal aa.author.posts.count, aa.author.posts.length end def test_nested_loading_through_has_one_association_with_order aa = AuthorAddress.all.merge!(includes: { author: :posts }, order: "author_addresses.id").find(author_addresses(:david_address).id) assert_equal aa.author.posts.count, aa.author.posts.length end def test_nested_loading_through_has_one_association_with_order_on_association aa = AuthorAddress.all.merge!(includes: { author: :posts }, order: "authors.id").find(author_addresses(:david_address).id) assert_equal aa.author.posts.count, aa.author.posts.length end def test_nested_loading_through_has_one_association_with_order_on_nested_association aa = AuthorAddress.all.merge!(includes: { author: :posts }, order: "posts.id").find(author_addresses(:david_address).id) assert_equal aa.author.posts.count, aa.author.posts.length end def test_nested_loading_through_has_one_association_with_conditions aa = AuthorAddress.references(:author_addresses).merge( includes: { author: :posts }, where: "author_addresses.id > 0" ).find author_addresses(:david_address).id assert_equal aa.author.posts.count, aa.author.posts.length end def test_nested_loading_through_has_one_association_with_conditions_on_association aa = AuthorAddress.references(:authors).merge( includes: { author: :posts }, where: "authors.id > 0" ).find author_addresses(:david_address).id assert_equal aa.author.posts.count, aa.author.posts.length end def test_nested_loading_through_has_one_association_with_conditions_on_nested_association aa = AuthorAddress.references(:posts).merge( includes: { author: :posts }, where: "posts.id > 0" ).find author_addresses(:david_address).id assert_equal aa.author.posts.count, aa.author.posts.length end def test_eager_association_loading_with_belongs_to_and_foreign_keys pets = Pet.all.merge!(includes: :owner).to_a assert_equal 4, pets.length end def test_eager_association_loading_with_belongs_to comments = Comment.all.merge!(includes: :post).to_a assert_equal 11, comments.length titles = comments.map { |c| c.post.title } assert_includes titles, posts(:welcome).title assert_includes titles, posts(:sti_post_and_comments).title end def test_eager_association_loading_with_belongs_to_and_limit comments = Comment.all.merge!(includes: :post, limit: 5, order: "comments.id").to_a assert_equal 5, comments.length assert_equal [1, 2, 3, 5, 6], comments.collect(&:id) end def test_eager_association_loading_with_belongs_to_and_limit_and_conditions comments = Comment.all.merge!(includes: :post, where: "post_id = 4", limit: 3, order: "comments.id").to_a assert_equal 3, comments.length assert_equal [5, 6, 7], comments.collect(&:id) end def test_eager_association_loading_with_belongs_to_and_limit_and_offset comments = Comment.all.merge!(includes: :post, limit: 3, offset: 2, order: "comments.id").to_a assert_equal 3, comments.length assert_equal [3, 5, 6], comments.collect(&:id) end def test_eager_association_loading_with_belongs_to_and_limit_and_offset_and_conditions comments = Comment.all.merge!(includes: :post, where: "post_id = 4", limit: 3, offset: 1, order: "comments.id").to_a assert_equal 3, comments.length assert_equal [6, 7, 8], comments.collect(&:id) end def test_eager_association_loading_with_belongs_to_and_limit_and_offset_and_conditions_array comments = Comment.all.merge!(includes: :post, where: ["post_id = ?", 4], limit: 3, offset: 1, order: "comments.id").to_a assert_equal 3, comments.length assert_equal [6, 7, 8], comments.collect(&:id) end def test_eager_association_loading_with_belongs_to_and_conditions_string_with_unquoted_table_name assert_nothing_raised do Comment.includes(:post).references(:posts).where("posts.id = ?", 4) end end def test_eager_association_loading_with_belongs_to_and_conditions_hash comments = [] assert_nothing_raised do comments = Comment.all.merge!(includes: :post, where: { posts: { id: 4 } }, limit: 3, order: "comments.id").to_a end assert_equal 3, comments.length assert_equal [5, 6, 7], comments.collect(&:id) assert_no_queries do comments.first.post end end def test_eager_association_loading_with_belongs_to_and_conditions_string_with_quoted_table_name quoted_posts_id = Comment.connection.quote_table_name("posts") + "." + Comment.connection.quote_column_name("id") assert_nothing_raised do Comment.includes(:post).references(:posts).where("#{quoted_posts_id} = ?", 4) end end def test_eager_association_loading_with_belongs_to_and_order_string_with_unquoted_table_name assert_nothing_raised do Comment.all.merge!(includes: :post, order: "posts.id").to_a end end def test_eager_association_loading_with_belongs_to_and_order_string_with_quoted_table_name quoted_posts_id = Comment.connection.quote_table_name("posts") + "." + Comment.connection.quote_column_name("id") assert_nothing_raised do Comment.includes(:post).references(:posts).order(quoted_posts_id) end end def test_eager_association_loading_with_belongs_to_and_limit_and_multiple_associations posts = Post.all.merge!(includes: [:author, :very_special_comment], limit: 1, order: "posts.id").to_a assert_equal 1, posts.length assert_equal [1], posts.collect(&:id) end def test_eager_association_loading_with_belongs_to_and_limit_and_offset_and_multiple_associations posts = Post.all.merge!(includes: [:author, :very_special_comment], limit: 1, offset: 1, order: "posts.id").to_a assert_equal 1, posts.length assert_equal [2], posts.collect(&:id) end def test_eager_association_loading_with_belongs_to_inferred_foreign_key_from_association_name author_favorite = AuthorFavorite.all.merge!(includes: :favorite_author).first assert_equal authors(:mary), assert_no_queries { author_favorite.favorite_author } end def test_eager_load_belongs_to_quotes_table_and_column_names job = Job.includes(:ideal_reference).find jobs(:unicyclist).id references(:michael_unicyclist) assert_no_queries { assert_equal references(:michael_unicyclist), job.ideal_reference } end def test_eager_load_has_one_quotes_table_and_column_names michael = Person.all.merge!(includes: :favourite_reference).find(people(:michael).id) references(:michael_unicyclist) assert_no_queries { assert_equal references(:michael_unicyclist), michael.favourite_reference } end def test_eager_load_has_many_quotes_table_and_column_names michael = Person.all.merge!(includes: :references).find(people(:michael).id) references(:michael_magician, :michael_unicyclist) assert_no_queries { assert_equal references(:michael_magician, :michael_unicyclist), michael.references.sort_by(&:id) } end def test_eager_load_has_many_through_quotes_table_and_column_names michael = Person.all.merge!(includes: :jobs).find(people(:michael).id) jobs(:magician, :unicyclist) assert_no_queries { assert_equal jobs(:unicyclist, :magician), michael.jobs.sort_by(&:id) } end def test_eager_load_has_many_with_string_keys subscriptions = subscriptions(:webster_awdr, :webster_rfr) subscriber = Subscriber.all.merge!(includes: :subscriptions).find(subscribers(:second).id) assert_equal subscriptions, subscriber.subscriptions.sort_by(&:id) end def test_string_id_column_joins s = Subscriber.create! do |c| c.id = "PL" end b = Book.create! Subscription.create!(subscriber_id: "PL", book_id: b.id) s.reload s.book_ids = s.book_ids end def test_eager_load_has_many_through_with_string_keys books = books(:awdr, :rfr) subscriber = Subscriber.all.merge!(includes: :books).find(subscribers(:second).id) assert_equal books, subscriber.books.sort_by(&:id) end def test_eager_load_belongs_to_with_string_keys subscriber = subscribers(:second) subscription = Subscription.all.merge!(includes: :subscriber).find(subscriptions(:webster_awdr).id) assert_equal subscriber, subscription.subscriber end def test_eager_association_loading_with_explicit_join posts = Post.all.merge!(includes: :comments, joins: "INNER JOIN authors ON posts.author_id = authors.id AND authors.name = 'Mary'", limit: 1, order: "author_id").to_a assert_equal 1, posts.length end def test_eager_with_has_many_through posts_with_comments = people(:michael).posts.merge(includes: :comments, order: "posts.id").to_a posts_with_author = people(:michael).posts.merge(includes: :author, order: "posts.id").to_a posts_with_comments_and_author = people(:michael).posts.merge(includes: [ :comments, :author ], order: "posts.id").to_a assert_equal 2, posts_with_comments.inject(0) { |sum, post| sum + post.comments.size } assert_equal authors(:david), assert_no_queries { posts_with_author.first.author } assert_equal authors(:david), assert_no_queries { posts_with_comments_and_author.first.author } end def test_eager_with_has_many_through_a_belongs_to_association author = authors(:mary) Post.create!(author: author, title: "TITLE", body: "BODY") author.author_favorites.create(favorite_author_id: 1) author.author_favorites.create(favorite_author_id: 2) posts_with_author_favorites = author.posts.merge(includes: :author_favorites).to_a assert_no_queries { posts_with_author_favorites.first.author_favorites.first.author_id } end def test_eager_with_has_many_through_an_sti_join_model author = Author.all.merge!(includes: :special_post_comments, order: "authors.id").first assert_equal [comments(:does_it_hurt)], assert_no_queries { author.special_post_comments } end def test_eager_with_has_many_through_an_sti_join_model_with_conditions_on_both author = Author.all.merge!(includes: :special_nonexistent_post_comments, order: "authors.id").first assert_equal [], author.special_nonexistent_post_comments end def test_eager_with_has_many_through_join_model_with_conditions assert_equal Author.all.merge!(includes: :hello_post_comments, order: "authors.id").first.hello_post_comments.sort_by(&:id), Author.all.merge!(order: "authors.id").first.hello_post_comments.sort_by(&:id) end def test_eager_with_has_many_through_join_model_with_conditions_on_top_level assert_equal comments(:more_greetings), Author.all.merge!(includes: :comments_with_order_and_conditions).find(authors(:david).id).comments_with_order_and_conditions.first end def test_eager_with_has_many_through_join_model_with_include author_comments = Author.all.merge!(includes: :comments_with_include).find(authors(:david).id).comments_with_include.to_a assert_no_queries do author_comments.first.post.title end end def test_eager_with_has_many_through_with_conditions_join_model_with_include post_tags = Post.find(posts(:welcome).id).misc_tags eager_post_tags = Post.all.merge!(includes: :misc_tags).find(1).misc_tags assert_equal post_tags, eager_post_tags end def test_eager_with_has_many_through_join_model_ignores_default_includes assert_nothing_raised do authors(:david).comments_on_posts_with_default_include.to_a end end def test_eager_with_has_many_and_limit posts = Post.all.merge!(order: "posts.id asc", includes: [ :author, :comments ], limit: 2).to_a 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_and_conditions posts = Post.all.merge!(includes: [ :author, :comments ], limit: 2, where: "posts.body = 'hello'", order: "posts.id").to_a assert_equal 2, posts.size assert_equal [4, 5], posts.collect(&:id) end def test_eager_with_has_many_and_limit_and_conditions_array posts = Post.all.merge!(includes: [ :author, :comments ], limit: 2, where: [ "posts.body = ?", "hello" ], order: "posts.id").to_a assert_equal 2, posts.size assert_equal [4, 5], posts.collect(&:id) end def test_eager_with_has_many_and_limit_and_conditions_array_on_the_eagers posts = Post.includes(:author, :comments).limit(2).references(:author).where("authors.name = ?", "David") assert_equal 2, posts.size count = Post.includes(:author, :comments).limit(2).references(:author).where("authors.name = ?", "David").count assert_equal posts.size, count end def test_eager_with_has_many_and_limit_and_high_offset posts = Post.all.merge!(includes: [ :author, :comments ], limit: 2, offset: 10, where: { "authors.name" => "David" }).to_a assert_equal 0, posts.size end def test_eager_with_has_many_and_limit_and_high_offset_and_multiple_array_conditions assert_queries(1) do posts = Post.references(:authors, :comments). merge(includes: [ :author, :comments ], limit: 2, offset: 10, where: [ "authors.name = ? and comments.body = ?", "David", "go crazy" ]).to_a assert_equal 0, posts.size end end def test_eager_with_has_many_and_limit_and_high_offset_and_multiple_hash_conditions assert_queries(1) do posts = Post.all.merge!(includes: [ :author, :comments ], limit: 2, offset: 10, where: { "authors.name" => "David", "comments.body" => "go crazy" }).to_a assert_equal 0, posts.size end end def test_count_eager_with_has_many_and_limit_and_high_offset posts = Post.all.merge!(includes: [ :author, :comments ], limit: 2, offset: 10, where: { "authors.name" => "David" }).count(:all) assert_equal 0, posts end def test_eager_with_has_many_and_limit_with_no_results posts = Post.all.merge!(includes: [ :author, :comments ], limit: 2, where: "posts.title = 'magic forest'").to_a assert_equal 0, posts.size end def test_eager_count_performed_on_a_has_many_association_with_multi_table_conditional author = authors(:david) author_posts_without_comments = author.posts.select { |post| post.comments.blank? } assert_equal author_posts_without_comments.size, author.posts.includes(:comments).where("comments.id is null").references(:comments).count end def test_eager_count_performed_on_a_has_many_through_association_with_multi_table_conditional person = people(:michael) person_posts_without_comments = person.posts.select { |post| post.comments.blank? } assert_equal person_posts_without_comments.size, person.posts_with_no_comments.count end def test_eager_with_has_and_belongs_to_many_and_limit posts = Post.all.merge!(includes: :categories, order: "posts.id", limit: 3).to_a 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_includes posts[0].categories, categories(:technology) assert_includes posts[1].categories, categories(:general) end # Since the preloader for habtm gets raw row hashes from the database and then # instantiates them, this test ensures that it only instantiates one actual # object per record from the database. def test_has_and_belongs_to_many_should_not_instantiate_same_records_multiple_times welcome = posts(:welcome) categories = Category.includes(:posts) general = categories.find { |c| c == categories(:general) } technology = categories.find { |c| c == categories(:technology) } post1 = general.posts.to_a.find { |p| p == welcome } post2 = technology.posts.to_a.find { |p| p == welcome } assert_equal post1.object_id, post2.object_id end def test_eager_with_has_many_and_limit_and_conditions_on_the_eagers posts = authors(:david).posts .includes(:comments) .where("comments.body like 'Normal%' OR comments.#{QUOTED_TYPE}= 'SpecialComment'") .references(:comments) .limit(2) .to_a assert_equal 2, posts.size count = Post.includes(:comments, :author) .where("authors.name = 'David' AND (comments.body like 'Normal%' OR comments.#{QUOTED_TYPE}= 'SpecialComment')") .references(:authors, :comments) .limit(2) .count assert_equal count, posts.size end def test_eager_with_has_many_and_limit_and_scoped_conditions_on_the_eagers posts = nil Post.includes(:comments) .where("comments.body like 'Normal%' OR comments.#{QUOTED_TYPE}= 'SpecialComment'") .references(:comments) .scoping do posts = authors(:david).posts.limit(2).to_a assert_equal 2, posts.size end Post.includes(:comments, :author) .where("authors.name = 'David' AND (comments.body like 'Normal%' OR comments.#{QUOTED_TYPE}= 'SpecialComment')") .references(:authors, :comments) .scoping do count = Post.limit(2).count assert_equal count, posts.size end end def test_eager_association_loading_with_habtm posts = Post.all.merge!(includes: :categories, order: "posts.id").to_a assert_equal 2, posts[0].categories.size assert_equal 1, posts[1].categories.size assert_equal 0, posts[2].categories.size assert_includes posts[0].categories, categories(:technology) assert_includes posts[1].categories, categories(:general) end def test_eager_with_inheritance SpecialPost.all.merge!(includes: [ :comments ]).to_a end def test_eager_has_one_with_association_inheritance post = Post.all.merge!(includes: [ :very_special_comment ]).find(4) assert_equal "VerySpecialComment", post.very_special_comment.class.to_s end def test_eager_has_many_with_association_inheritance post = Post.all.merge!(includes: [ :special_comments ]).find(4) post.special_comments.each do |special_comment| assert special_comment.is_a?(SpecialComment) end end def test_eager_habtm_with_association_inheritance post = Post.all.merge!(includes: [ :special_categories ]).find(6) 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.all.merge!(includes: :account, where: ["companies.name = ?", "37signals"]).first assert_not_nil f.account assert_equal companies(:first_firm, :reload).account, f.account end def test_eager_with_multi_table_conditional_properly_counts_the_records_when_using_size author = authors(:david) posts_with_no_comments = author.posts.select { |post| post.comments.blank? } assert_equal posts_with_no_comments.size, author.posts_with_no_comments.size assert_equal posts_with_no_comments, author.posts_with_no_comments end def test_eager_with_invalid_association_reference assert_raise(ActiveRecord::AssociationNotFoundError, "Association was not found; perhaps you misspelled it? You specified :include => :monkeys") { Post.all.merge!(includes: :monkeys).find(6) } assert_raise(ActiveRecord::AssociationNotFoundError, "Association was not found; perhaps you misspelled it? You specified :include => :monkeys") { Post.all.merge!(includes: [ :monkeys ]).find(6) } assert_raise(ActiveRecord::AssociationNotFoundError, "Association was not found; perhaps you misspelled it? You specified :include => :monkeys") { Post.all.merge!(includes: [ "monkeys" ]).find(6) } assert_raise(ActiveRecord::AssociationNotFoundError, "Association was not found; perhaps you misspelled it? You specified :include => :monkeys, :elephants") { Post.all.merge!(includes: [ :monkeys, :elephants ]).find(6) } end def test_eager_has_many_through_with_order tag = OrderedTag.create(name: "Foo") post1 = Post.create!(title: "Beaches", body: "I like beaches!") post2 = Post.create!(title: "Pools", body: "I like pools!") Tagging.create!(taggable_type: "Post", taggable_id: post1.id, tag: tag) Tagging.create!(taggable_type: "Post", taggable_id: post2.id, tag: tag) tag_with_includes = OrderedTag.includes(:tagged_posts).find(tag.id) assert_equal(tag_with_includes.taggings.map(&:taggable).map(&:title), tag_with_includes.tagged_posts.map(&:title)) end def test_eager_has_many_through_multiple_with_order tag1 = OrderedTag.create!(name: "Bar") tag2 = OrderedTag.create!(name: "Foo") post1 = Post.create!(title: "Beaches", body: "I like beaches!") post2 = Post.create!(title: "Pools", body: "I like pools!") Tagging.create!(taggable: post1, tag: tag1) Tagging.create!(taggable: post2, tag: tag1) Tagging.create!(taggable: post2, tag: tag2) Tagging.create!(taggable: post1, tag: tag2) tags_with_includes = OrderedTag.where(id: [tag1, tag2].map(&:id)).includes(:tagged_posts).order(:id).to_a tag1_with_includes = tags_with_includes.first tag2_with_includes = tags_with_includes.last assert_equal([post2, post1].map(&:title), tag1_with_includes.tagged_posts.map(&:title)) assert_equal([post1, post2].map(&:title), tag2_with_includes.tagged_posts.map(&:title)) end def test_eager_with_default_scope developer = EagerDeveloperWithDefaultScope.where(name: "David").first projects = Project.order(:id).to_a assert_no_queries do assert_equal(projects, developer.projects) end end def test_eager_with_default_scope_as_class_method developer = EagerDeveloperWithClassMethodDefaultScope.where(name: "David").first projects = Project.order(:id).to_a assert_no_queries do assert_equal(projects, developer.projects) end end def test_eager_with_default_scope_as_class_method_using_find_method david = developers(:david) developer = EagerDeveloperWithClassMethodDefaultScope.find(david.id) projects = Project.order(:id).to_a assert_no_queries do assert_equal(projects, developer.projects) end end def test_eager_with_default_scope_as_class_method_using_find_by_method developer = EagerDeveloperWithClassMethodDefaultScope.find_by(name: "David") projects = Project.order(:id).to_a assert_no_queries do assert_equal(projects, developer.projects) end end def test_eager_with_default_scope_as_lambda developer = EagerDeveloperWithLambdaDefaultScope.where(name: "David").first projects = Project.order(:id).to_a assert_no_queries do assert_equal(projects, developer.projects) end end def test_eager_with_default_scope_as_block # warm up the habtm cache EagerDeveloperWithBlockDefaultScope.where(name: "David").first.projects developer = EagerDeveloperWithBlockDefaultScope.where(name: "David").first projects = Project.order(:id).to_a assert_no_queries do assert_equal(projects, developer.projects) end end def test_eager_with_default_scope_as_callable developer = EagerDeveloperWithCallableDefaultScope.where(name: "David").first projects = Project.order(:id).to_a assert_no_queries do assert_equal(projects, developer.projects) end end def find_all_ordered(className, include = nil) className.all.merge!(order: "#{className.table_name}.#{className.primary_key}", includes: include).to_a end def test_limited_eager_with_order assert_equal( posts(:thinking, :sti_comments), Post.all.merge!( includes: [:author, :comments], where: { "authors.name" => "David" }, order: "UPPER(posts.title)", limit: 2, offset: 1 ).to_a ) assert_equal( posts(:sti_post_and_comments, :sti_comments), Post.all.merge!( includes: [:author, :comments], where: { "authors.name" => "David" }, order: "UPPER(posts.title) DESC", limit: 2, offset: 1 ).to_a ) end def test_limited_eager_with_multiple_order_columns assert_equal( posts(:thinking, :sti_comments), Post.all.merge!( includes: [:author, :comments], where: { "authors.name" => "David" }, order: ["UPPER(posts.title)", "posts.id"], limit: 2, offset: 1 ).to_a ) assert_equal( posts(:sti_post_and_comments, :sti_comments), Post.all.merge!( includes: [:author, :comments], where: { "authors.name" => "David" }, order: ["UPPER(posts.title) DESC", "posts.id"], limit: 2, offset: 1 ).to_a ) end def test_limited_eager_with_numeric_in_association assert_equal( people(:david, :susan), Person.references(:number1_fans_people).merge( includes: [:readers, :primary_contact, :number1_fan], where: "number1_fans_people.first_name like 'M%'", order: "people.id", limit: 2, offset: 0 ).to_a ) end def test_polymorphic_type_condition post = Post.all.merge!(includes: :taggings).find(posts(:thinking).id) assert_includes post.taggings, taggings(:thinking_general) post = SpecialPost.all.merge!(includes: :taggings).find(posts(:thinking).id) assert_includes post.taggings, taggings(:thinking_general) end def test_eager_with_multiple_associations_with_same_table_has_many_and_habtm # Eager includes of has many and habtm associations aren't necessarily sorted in the same way def assert_equal_after_sort(item1, item2, item3 = nil) assert_equal(item1.sort { |a, b| a.id <=> b.id }, item2.sort { |a, b| a.id <=> b.id }) assert_equal(item3.sort { |a, b| a.id <=> b.id }, item2.sort { |a, b| a.id <=> b.id }) if item3 end # Test regular association, association with conditions, association with # STI, and association with conditions assured not to be true post_types = [:posts, :other_posts, :special_posts] # test both has_many and has_and_belongs_to_many [Author, Category].each do |className| d1 = find_all_ordered(className) # test including all post types at once d2 = find_all_ordered(className, post_types) d1.each_index do |i| assert_equal(d1[i], d2[i]) assert_equal_after_sort(d1[i].posts, d2[i].posts) post_types[1..-1].each do |post_type| # test including post_types together d3 = find_all_ordered(className, [:posts, post_type]) assert_equal(d1[i], d3[i]) assert_equal_after_sort(d1[i].posts, d3[i].posts) assert_equal_after_sort(d1[i].send(post_type), d2[i].send(post_type), d3[i].send(post_type)) end end end end def test_eager_with_multiple_associations_with_same_table_has_one d1 = find_all_ordered(Firm) d2 = find_all_ordered(Firm, :account) d1.each_index do |i| assert_equal(d1[i], d2[i]) assert_equal(d1[i].account, d2[i].account) end end def test_eager_with_multiple_associations_with_same_table_belongs_to firm_types = [:firm, :firm_with_basic_id, :firm_with_other_name, :firm_with_condition] d1 = find_all_ordered(Client) d2 = find_all_ordered(Client, firm_types) d1.each_index do |i| assert_equal(d1[i], d2[i]) firm_types.each { |type| assert_equal(d1[i].send(type), d2[i].send(type)) } end end def test_eager_with_valid_association_as_string_not_symbol assert_nothing_raised { Post.all.merge!(includes: "comments").to_a } end def test_eager_with_floating_point_numbers assert_queries(2) do # Before changes, the floating point numbers will be interpreted as table names and will cause this to run in one query Comment.all.merge!(where: "123.456 = 123.456", includes: :post).to_a end end def test_preconfigured_includes_with_belongs_to author = posts(:welcome).author_with_posts assert_no_queries { assert_equal 5, author.posts.size } end def test_preconfigured_includes_with_has_one comment = posts(:sti_comments).very_special_comment_with_post assert_no_queries { assert_equal posts(:sti_comments), comment.post } end def test_eager_association_with_scope_with_joins assert_nothing_raised do Post.includes(:very_special_comment_with_post_with_joins).to_a end end def test_preconfigured_includes_with_has_many posts = authors(:david).posts_with_comments one = posts.detect { |p| p.id == 1 } assert_no_queries do assert_equal 5, posts.size assert_equal 2, one.comments.size end end def test_preconfigured_includes_with_habtm posts = authors(:david).posts_with_categories one = posts.detect { |p| p.id == 1 } assert_no_queries do assert_equal 5, posts.size assert_equal 2, one.categories.size end end def test_preconfigured_includes_with_has_many_and_habtm posts = authors(:david).posts_with_comments_and_categories one = posts.detect { |p| p.id == 1 } assert_no_queries do assert_equal 5, posts.size assert_equal 2, one.comments.size assert_equal 2, one.categories.size end end def test_count_with_include assert_equal 3, authors(:david).posts_with_comments.where("length(comments.body) > 15").references(:comments).count end def test_association_loading_notification notifications = messages_for("instantiation.active_record") do Developer.all.merge!(includes: "projects", where: { "developers_projects.access_level" => 1 }, limit: 5).to_a.size end message = notifications.first payload = message.last count = Developer.all.merge!(includes: "projects", where: { "developers_projects.access_level" => 1 }, limit: 5).to_a.size # eagerloaded row count should be greater than just developer count assert_operator payload[:record_count], :>, count assert_equal Developer.name, payload[:class_name] end def test_base_messages notifications = messages_for("instantiation.active_record") do Developer.all.to_a end message = notifications.first payload = message.last assert_equal Developer.all.to_a.count, payload[:record_count] assert_equal Developer.name, payload[:class_name] end def messages_for(name) notifications = [] ActiveSupport::Notifications.subscribe(name) do |*args| notifications << args end yield notifications ensure ActiveSupport::Notifications.unsubscribe(name) end def test_load_with_sti_sharing_association assert_queries(2) do #should not do 1 query per subclass Comment.includes(:post).to_a end end def test_conditions_on_join_table_with_include_and_limit assert_equal 3, Developer.all.merge!(includes: "projects", where: { "developers_projects.access_level" => 1 }, limit: 5).to_a.size end def test_dont_create_temporary_active_record_instances Developer.instance_count = 0 developers = Developer.all.merge!(includes: "projects", where: { "developers_projects.access_level" => 1 }, limit: 5).to_a assert_equal developers.count, Developer.instance_count end def test_order_on_join_table_with_include_and_limit assert_equal 5, Developer.all.merge!(includes: "projects", order: "developers_projects.joined_on DESC", limit: 5).to_a.size end def test_eager_loading_with_order_on_joined_table_preloads posts = assert_queries(2) do Post.all.merge!(joins: :comments, includes: :author, order: "comments.id DESC").to_a end assert_equal posts(:eager_other), posts[1] assert_equal authors(:mary), assert_no_queries { posts[1].author } end def test_eager_loading_with_conditions_on_joined_table_preloads posts = assert_queries(2) do Post.all.merge!(select: "distinct posts.*", includes: :author, joins: [:comments], where: "comments.body like 'Thank you%'", order: "posts.id").to_a end assert_equal [posts(:welcome)], posts assert_equal authors(:david), assert_no_queries { posts[0].author } posts = assert_queries(2) do Post.all.merge!(select: "distinct posts.*", includes: :author, joins: [:comments], where: "comments.body like 'Thank you%'", order: "posts.id").to_a end assert_equal [posts(:welcome)], posts assert_equal authors(:david), assert_no_queries { posts[0].author } posts = assert_queries(2) do Post.all.merge!(includes: :author, joins: { taggings: :tag }, where: "tags.name = 'General'", order: "posts.id").to_a end assert_equal posts(:welcome, :thinking), posts posts = assert_queries(2) do Post.all.merge!(includes: :author, joins: { taggings: { tag: :taggings } }, where: "taggings_tags.super_tag_id=2", order: "posts.id").to_a end assert_equal posts(:welcome, :thinking), posts end def test_preload_has_many_with_association_condition_and_default_scope post = Post.create!(title: "Beaches", body: "I like beaches!") Reader.create! person: people(:david), post: post LazyReader.create! person: people(:susan), post: post assert_equal 1, post.lazy_readers.to_a.size assert_equal 2, post.lazy_readers_skimmers_or_not.to_a.size post_with_readers = Post.includes(:lazy_readers_skimmers_or_not).find(post.id) assert_equal 2, post_with_readers.lazy_readers_skimmers_or_not.to_a.size end def test_eager_loading_with_conditions_on_string_joined_table_preloads posts = assert_queries(2) do Post.all.merge!(select: "distinct posts.*", includes: :author, joins: "INNER JOIN comments on comments.post_id = posts.id", where: "comments.body like 'Thank you%'", order: "posts.id").to_a end assert_equal [posts(:welcome)], posts assert_equal authors(:david), assert_no_queries { posts[0].author } posts = assert_queries(2) do Post.all.merge!(select: "distinct posts.*", includes: :author, joins: ["INNER JOIN comments on comments.post_id = posts.id"], where: "comments.body like 'Thank you%'", order: "posts.id").to_a end assert_equal [posts(:welcome)], posts assert_equal authors(:david), assert_no_queries { posts[0].author } end def test_eager_loading_with_select_on_joined_table_preloads posts = assert_queries(2) do Post.all.merge!(select: "posts.*, authors.name as author_name", includes: :comments, joins: :author, order: "posts.id").to_a end assert_equal "David", posts[0].author_name assert_equal posts(:welcome).comments, assert_no_queries { posts[0].comments } end def test_eager_loading_with_conditions_on_join_model_preloads authors = assert_queries(2) do Author.all.merge!(includes: :author_address, joins: :comments, where: "posts.title like 'Welcome%'").to_a end assert_equal authors(:david), authors[0] assert_equal author_addresses(:david_address), authors[0].author_address end def test_preload_belongs_to_uses_exclusive_scope people = Person.males.merge(includes: :primary_contact).to_a assert_not_equal people.length, 0 people.each do |person| assert_no_queries { assert_not_nil person.primary_contact } assert_equal Person.find(person.id).primary_contact, person.primary_contact end end def test_preload_has_many_uses_exclusive_scope people = Person.males.includes(:agents).to_a people.each do |person| assert_equal Person.find(person.id).agents, person.agents end end def test_preload_has_many_using_primary_key expected = Firm.first.clients_using_primary_key.to_a firm = Firm.includes(:clients_using_primary_key).first assert_no_queries do assert_equal expected, firm.clients_using_primary_key end end def test_include_has_many_using_primary_key expected = Firm.find(1).clients_using_primary_key.sort_by(&:name) # Oracle adapter truncates alias to 30 characters if current_adapter?(:OracleAdapter) firm = Firm.all.merge!(includes: :clients_using_primary_key, order: "clients_using_primary_keys_companies"[0, 30] + ".name").find(1) else firm = Firm.all.merge!(includes: :clients_using_primary_key, order: "clients_using_primary_keys_companies.name").find(1) end assert_no_queries do assert_equal expected, firm.clients_using_primary_key end end def test_preload_has_one_using_primary_key expected = accounts(:signals37) firm = Firm.all.merge!(includes: :account_using_primary_key, order: "companies.id").first assert_no_queries do assert_equal expected, firm.account_using_primary_key end end def test_include_has_one_using_primary_key expected = accounts(:signals37) firm = Firm.all.merge!(includes: :account_using_primary_key, order: "accounts.id").to_a.detect { |f| f.id == 1 } assert_no_queries do assert_equal expected, firm.account_using_primary_key end end def test_preloading_empty_belongs_to c = Client.create!(name: "Foo", client_of: Company.maximum(:id) + 1) client = assert_queries(2) { Client.preload(:firm).find(c.id) } assert_no_queries { assert_nil client.firm } end def test_preloading_empty_belongs_to_polymorphic t = Tagging.create!(taggable_type: "Post", taggable_id: Post.maximum(:id) + 1, tag: tags(:general)) tagging = assert_queries(2) { Tagging.preload(:taggable).find(t.id) } assert_no_queries { assert_nil tagging.taggable } end def test_preloading_through_empty_belongs_to c = Client.create!(name: "Foo", client_of: Company.maximum(:id) + 1) client = assert_queries(2) { Client.preload(:accounts).find(c.id) } assert_no_queries { assert client.accounts.empty? } end def test_preloading_has_many_through_with_distinct mary = Author.includes(:unique_categorized_posts).where(id: authors(:mary).id).first assert_equal 1, mary.unique_categorized_posts.length assert_equal 1, mary.unique_categorized_post_ids.length end def test_preloading_has_one_using_reorder klass = Class.new(ActiveRecord::Base) do def self.name; "TempAuthor"; end self.table_name = "authors" has_one :post, class_name: "PostWithDefaultScope", foreign_key: :author_id has_one :reorderd_post, -> { reorder(title: :desc) }, class_name: "PostWithDefaultScope", foreign_key: :author_id end author = klass.first # PRECONDITION: make sure ordering results in different results assert_not_equal author.post, author.reorderd_post preloaded_reorderd_post = klass.preload(:reorderd_post).first.reorderd_post assert_equal author.reorderd_post, preloaded_reorderd_post assert_equal Post.order(title: :desc).first.title, preloaded_reorderd_post.title end def test_preloading_polymorphic_with_custom_foreign_type sponsor = sponsors(:moustache_club_sponsor_for_groucho) groucho = members(:groucho) sponsor = assert_queries(2) { Sponsor.includes(:thing).where(id: sponsor.id).first } assert_no_queries { assert_equal groucho, sponsor.thing } end def test_joins_with_includes_should_preload_via_joins post = assert_queries(1) { Post.includes(:comments).joins(:comments).order("posts.id desc").to_a.first } assert_queries(0) do assert_not_equal 0, post.comments.to_a.count end end def test_join_eager_with_empty_order_should_generate_valid_sql assert_nothing_raised do Post.includes(:comments).order("").where(comments: { body: "Thank you for the welcome" }).first end end def test_deep_including_through_habtm # warm up habtm cache posts = Post.all.merge!(includes: { categories: :categorizations }, order: "posts.id").to_a posts[0].categories[0].categorizations.length posts = Post.all.merge!(includes: { categories: :categorizations }, order: "posts.id").to_a assert_no_queries { assert_equal 2, posts[0].categories[0].categorizations.length } assert_no_queries { assert_equal 1, posts[0].categories[1].categorizations.length } assert_no_queries { assert_equal 2, posts[1].categories[0].categorizations.length } end def test_eager_load_multiple_associations_with_references mentor = Mentor.create!(name: "Barış Can DAYLIK") developer = Developer.create!(name: "Mehmet Emin İNAÇ", mentor: mentor) Contract.create!(developer: developer) project = Project.create!(name: "VNGRS", mentor: mentor) project.developers << developer projects = Project.references(:mentors).includes(mentor: { developers: :contracts }, developers: :contracts) assert_equal projects.last.mentor.developers.first.contracts, projects.last.developers.last.contracts end test "scoping with a circular preload" do assert_equal Comment.find(1), Comment.preload(post: :comments).scoping { Comment.find(1) } end test "circular preload does not modify unscoped" do expected = FirstPost.unscoped.find(2) FirstPost.preload(comments: :first_post).find(1) assert_equal expected, FirstPost.unscoped.find(2) end test "preload ignores the scoping" do assert_equal( Comment.find(1).post, Post.where("1 = 0").scoping { Comment.preload(:post).find(1).post } ) end test "deep preload" do post = Post.preload(author: :posts, comments: :post).first assert_predicate post.author.association(:posts), :loaded? assert_predicate post.comments.first.association(:post), :loaded? end test "preloading does not cache has many association subset when preloaded with a through association" do author = Author.includes(:comments_with_order_and_conditions, :posts).first assert_no_queries { assert_equal 2, author.comments_with_order_and_conditions.size } assert_no_queries { assert_equal 5, author.posts.size, "should not cache a subset of the association" } end test "preloading a through association twice does not reset it" do members = Member.includes(current_membership: :club).includes(:club).to_a assert_no_queries { assert_equal 3, members.map(&:current_membership).map(&:club).size } end test "works in combination with order(:symbol) and reorder(:symbol)" do author = Author.includes(:posts).references(:posts).order(:name).find_by("posts.title IS NOT NULL") assert_equal authors(:bob), author author = Author.includes(:posts).references(:posts).reorder(:name).find_by("posts.title IS NOT NULL") assert_equal authors(:bob), author end test "preloading with a polymorphic association and using the existential predicate but also using a select" do assert_equal authors(:david), authors(:david).essays.includes(:writer).first.writer assert_nothing_raised do authors(:david).essays.includes(:writer).select(:name).any? end end test "preloading the same association twice works" do Member.create! members = Member.preload(:current_membership).includes(current_membership: :club).all.to_a assert_no_queries { members_with_membership = members.select(&:current_membership) assert_equal 3, members_with_membership.map(&:current_membership).map(&:club).size } end test "preloading with a polymorphic association and using the existential predicate" do assert_equal authors(:david), authors(:david).essays.includes(:writer).first.writer assert_nothing_raised do authors(:david).essays.includes(:writer).any? authors(:david).essays.includes(:writer).exists? end end test "preloading associations with string joins and order references" do author = assert_queries(2) { Author.includes(:posts).joins("LEFT JOIN posts ON posts.author_id = authors.id").order("posts.title DESC").first } assert_no_queries { assert_equal 5, author.posts.size } end test "including associations with where.not adds implicit references" do author = assert_queries(2) { Author.includes(:posts).where.not(posts: { title: "Welcome to the weblog" }).last } assert_no_queries { assert_equal 2, author.posts.size } end test "including association based on sql condition and no database column" do assert_equal pets(:parrot), Owner.including_last_pet.first.last_pet end test "preloading and eager loading of instance dependent associations is not supported" do message = "association scope 'posts_with_signature' is" error = assert_raises(ArgumentError) do Author.includes(:posts_with_signature).to_a end assert_match message, error.message error = assert_raises(ArgumentError) do Author.preload(:posts_with_signature).to_a end assert_match message, error.message error = assert_raises(ArgumentError) do Author.eager_load(:posts_with_signature).to_a end assert_match message, error.message end test "preload with invalid argument" do exception = assert_raises(ArgumentError) do Author.preload(10).to_a end assert_equal("10 was not recognized for preload", exception.message) end test "associations with extensions are not instance dependent" do assert_nothing_raised do Author.includes(:posts_with_extension).to_a end end test "including associations with extensions and an instance dependent scope is not supported" do e = assert_raises(ArgumentError) do Author.includes(:posts_with_extension_and_instance).to_a end assert_match(/Preloading instance dependent scopes is not supported/, e.message) end test "preloading readonly association" do # has-one firm = Firm.where(id: "1").preload(:readonly_account).first! assert firm.readonly_account.readonly? # has_and_belongs_to_many project = Project.where(id: "2").preload(:readonly_developers).first! assert project.readonly_developers.first.readonly? # has-many :through david = Author.where(id: "1").preload(:readonly_comments).first! assert david.readonly_comments.first.readonly? end test "eager-loading non-readonly association" do # has_one firm = Firm.where(id: "1").eager_load(:account).first! assert_not firm.account.readonly? # has_and_belongs_to_many project = Project.where(id: "2").eager_load(:developers).first! assert_not project.developers.first.readonly? # has_many :through david = Author.where(id: "1").eager_load(:comments).first! assert_not david.comments.first.readonly? # belongs_to post = Post.where(id: "1").eager_load(:author).first! assert_not post.author.readonly? end test "eager-loading readonly association" do # has-one firm = Firm.where(id: "1").eager_load(:readonly_account).first! assert firm.readonly_account.readonly? # has_and_belongs_to_many project = Project.where(id: "2").eager_load(:readonly_developers).first! assert project.readonly_developers.first.readonly? # has-many :through david = Author.where(id: "1").eager_load(:readonly_comments).first! assert david.readonly_comments.first.readonly? # belongs_to post = Post.where(id: "1").eager_load(:readonly_author).first! assert post.readonly_author.readonly? end test "preloading a polymorphic association with references to the associated table" do post = Post.includes(:tags).references(:tags).where("tags.name = ?", "General").first assert_equal posts(:welcome), post end test "eager-loading a polymorphic association with references to the associated table" do post = Post.eager_load(:tags).where("tags.name = ?", "General").first assert_equal posts(:welcome), post end # CollectionProxy#reader is expensive, so the preloader avoids calling it. test "preloading has_many_through association avoids calling association.reader" do ActiveRecord::Associations::HasManyAssociation.any_instance.expects(:reader).never Author.preload(:readonly_comments).first! end end