diff options
Diffstat (limited to 'activerecord/test/cases/associations/nested_through_associations_test.rb')
| -rw-r--r-- | activerecord/test/cases/associations/nested_through_associations_test.rb | 467 |
1 files changed, 467 insertions, 0 deletions
diff --git a/activerecord/test/cases/associations/nested_through_associations_test.rb b/activerecord/test/cases/associations/nested_through_associations_test.rb new file mode 100644 index 0000000000..bfc290e877 --- /dev/null +++ b/activerecord/test/cases/associations/nested_through_associations_test.rb @@ -0,0 +1,467 @@ +require "cases/helper" +require 'models/author' +require 'models/post' +require 'models/person' +require 'models/reference' +require 'models/job' +require 'models/reader' +require 'models/comment' +require 'models/tag' +require 'models/tagging' +require 'models/subscriber' +require 'models/book' +require 'models/subscription' +require 'models/rating' +require 'models/member' +require 'models/member_detail' +require 'models/member_type' +require 'models/sponsor' +require 'models/club' +require 'models/organization' +require 'models/category' +require 'models/categorization' +require 'models/membership' +require 'models/essay' + +class NestedThroughAssociationsTest < ActiveRecord::TestCase + fixtures :authors, :books, :posts, :subscriptions, :subscribers, :tags, :taggings, + :people, :readers, :references, :jobs, :ratings, :comments, :members, :member_details, + :member_types, :sponsors, :clubs, :organizations, :categories, :categories_posts, + :categorizations, :memberships, :essays + + # Through associations can either use the has_many or has_one macros. + # + # has_many + # - Source reflection can be has_many, has_one, belongs_to or has_and_belongs_to_many + # - Through reflection can be has_many, has_one, belongs_to or has_and_belongs_to_many + # + # has_one + # - Source reflection can be has_one or belongs_to + # - Through reflection can be has_one or belongs_to + # + # Additionally, the source reflection and/or through reflection may be subject to + # polymorphism and/or STI. + # + # When testing these, we need to make sure it works via loading the association directly, or + # joining the association, or including the association. We also need to ensure that associations + # are readonly where relevant. + + # has_many through + # Source: has_many through + # Through: has_many + def test_has_many_through_has_many_with_has_many_through_source_reflection + general = tags(:general) + + assert_equal [general, general], authors(:david).tags + + assert_includes_and_joins_equal( + Author.where('tags.id' => tags(:general).id), + [authors(:david)], :tags + ) + + # This ensures that the polymorphism of taggings is being observed correctly + authors = Author.joins(:tags).where('taggings.taggable_type' => 'FakeModel') + assert authors.empty? + + authors = assert_queries(5) { Author.includes(:tags).to_a } + assert_no_queries do + assert_equal [general, general], authors.first.tags + end + end + + # has_many through + # Source: has_many + # Through: has_many through + def test_has_many_through_has_many_through_with_has_many_source_reflection + luke, david = subscribers(:first), subscribers(:second) + + author = authors(:david) + assert_equal [luke, david, david], author.subscribers.order('subscribers.nick') + + # All authors with subscribers where one of the subscribers' nick is 'alterself' + assert_includes_and_joins_equal( + Author.where('subscribers.nick' => 'alterself'), + [authors(:david)], :subscribers + ) + + authors = assert_queries(4) { Author.includes(:subscribers).to_a } + assert_no_queries do + assert_equal [luke, david, david], authors.first.subscribers.sort_by(&:nick) + end + end + + # has_many through + # Source: has_one through + # Through: has_one + def test_has_many_through_has_one_with_has_one_through_source_reflection + founding = member_types(:founding) + + assert_equal [founding], members(:groucho).nested_member_types + + assert_includes_and_joins_equal( + Member.where('member_types.id' => founding.id), + [members(:groucho)], :nested_member_types + ) + + members = assert_queries(4) { Member.includes(:nested_member_types).to_a } + assert_no_queries do + assert_equal [founding], members.first.nested_member_types + end + end + + # has_many through + # Source: has_one + # Through: has_one through + def test_has_many_through_has_one_through_with_has_one_source_reflection + mustache = sponsors(:moustache_club_sponsor_for_groucho) + + assert_equal [mustache], members(:groucho).nested_sponsors + + assert_includes_and_joins_equal( + Member.where('sponsors.id' => mustache.id), + [members(:groucho)], :nested_sponsors + ) + + members = assert_queries(4) { Member.includes(:nested_sponsors).to_a } + assert_no_queries do + assert_equal [mustache], members.first.nested_sponsors + end + end + + # has_many through + # Source: has_many through + # Through: has_one + def test_has_many_through_has_one_with_has_many_through_source_reflection + groucho_details, other_details = member_details(:groucho), member_details(:some_other_guy) + + assert_equal [groucho_details, other_details], + members(:groucho).organization_member_details.order('member_details.id') + + assert_includes_and_joins_equal( + Member.where('member_details.id' => member_details(:groucho).id).order('member_details.id'), + [members(:groucho), members(:some_other_guy)], :organization_member_details + ) + + members = Member.joins(:organization_member_details). + where('member_details.id' => 9) + assert members.empty? + + members = assert_queries(4) { Member.includes(:organization_member_details).to_a.sort_by(&:id) } + assert_no_queries do + assert_equal [groucho_details, other_details], members.first.organization_member_details.sort_by(&:id) + end + end + + # has_many through + # Source: has_many + # Through: has_one through + def test_has_many_through_has_one_through_with_has_many_source_reflection + groucho_details, other_details = member_details(:groucho), member_details(:some_other_guy) + + assert_equal [groucho_details, other_details], + members(:groucho).organization_member_details_2.order('member_details.id') + + assert_includes_and_joins_equal( + Member.where('member_details.id' => groucho_details.id).order('member_details.id'), + [members(:groucho), members(:some_other_guy)], :organization_member_details_2 + ) + + members = Member.joins(:organization_member_details_2). + where('member_details.id' => 9) + assert members.empty? + + members = assert_queries(4) { Member.includes(:organization_member_details_2).to_a.sort_by(&:id) } + assert_no_queries do + assert_equal [groucho_details, other_details], members.first.organization_member_details_2.sort_by(&:id) + end + end + + # has_many through + # Source: has_and_belongs_to_many + # Through: has_many + def test_has_many_through_has_many_with_has_and_belongs_to_many_source_reflection + general, cooking = categories(:general), categories(:cooking) + + assert_equal [general, cooking], authors(:bob).post_categories.order('categories.id') + + assert_includes_and_joins_equal( + Author.where('categories.id' => cooking.id), + [authors(:bob)], :post_categories + ) + + authors = assert_queries(3) { Author.includes(:post_categories).to_a.sort_by(&:id) } + assert_no_queries do + assert_equal [general, cooking], authors[2].post_categories.sort_by(&:id) + end + end + + # has_many through + # Source: has_many + # Through: has_and_belongs_to_many + def test_has_many_through_has_and_belongs_to_many_with_has_many_source_reflection + greetings, more = comments(:greetings), comments(:more_greetings) + + assert_equal [greetings, more], categories(:technology).post_comments.order('comments.id') + + assert_includes_and_joins_equal( + Category.where('comments.id' => more.id).order('comments.id'), + [categories(:general), categories(:technology)], :post_comments + ) + + categories = assert_queries(3) { Category.includes(:post_comments).to_a.sort_by(&:id) } + assert_no_queries do + assert_equal [greetings, more], categories[1].post_comments.sort_by(&:id) + end + end + + # has_many through + # Source: has_many through a habtm + # Through: has_many through + def test_has_many_through_has_many_with_has_many_through_habtm_source_reflection + greetings, more = comments(:greetings), comments(:more_greetings) + + assert_equal [greetings, more], authors(:bob).category_post_comments.order('comments.id') + + assert_includes_and_joins_equal( + Author.where('comments.id' => comments(:does_it_hurt).id).order('comments.id'), + [authors(:david), authors(:mary)], :category_post_comments + ) + + authors = assert_queries(5) { Author.includes(:category_post_comments).to_a.sort_by(&:id) } + assert_no_queries do + assert_equal [greetings, more], authors[2].category_post_comments.sort_by(&:id) + end + end + + # has_many through + # Source: belongs_to + # Through: has_many through + def test_has_many_through_has_many_through_with_belongs_to_source_reflection + general = tags(:general) + + assert_equal [general, general], authors(:david).tagging_tags + + assert_includes_and_joins_equal( + Author.where('tags.id' => tags(:general).id), + [authors(:david)], :tagging_tags + ) + + authors = assert_queries(5) { Author.includes(:tagging_tags).to_a } + assert_no_queries do + assert_equal [general, general], authors.first.tagging_tags + end + end + + # has_many through + # Source: has_many through + # Through: belongs_to + def test_has_many_through_belongs_to_with_has_many_through_source_reflection + welcome_general, thinking_general = taggings(:welcome_general), taggings(:thinking_general) + + assert_equal [welcome_general, thinking_general], + categorizations(:david_welcome_general).post_taggings.order('taggings.id') + + assert_includes_and_joins_equal( + Categorization.where('taggings.id' => welcome_general.id).order('taggings.id'), + [categorizations(:david_welcome_general)], :post_taggings + ) + + categorizations = assert_queries(4) { Categorization.includes(:post_taggings).to_a.sort_by(&:id) } + assert_no_queries do + assert_equal [welcome_general, thinking_general], categorizations.first.post_taggings.sort_by(&:id) + end + end + + # has_one through + # Source: has_one through + # Through: has_one + def test_has_one_through_has_one_with_has_one_through_source_reflection + founding = member_types(:founding) + + assert_equal founding, members(:groucho).nested_member_type + + assert_includes_and_joins_equal( + Member.where('member_types.id' => founding.id), + [members(:groucho)], :nested_member_type + ) + + members = assert_queries(4) { Member.includes(:nested_member_type).to_a.sort_by(&:id) } + assert_no_queries do + assert_equal founding, members.first.nested_member_type + end + end + + # has_one through + # Source: belongs_to + # Through: has_one through + def test_has_one_through_has_one_through_with_belongs_to_source_reflection + general = categories(:general) + + assert_equal general, members(:groucho).club_category + + assert_includes_and_joins_equal( + Member.where('categories.id' => categories(:technology).id), + [members(:blarpy_winkup)], :club_category + ) + + members = assert_queries(4) { Member.includes(:club_category).to_a.sort_by(&:id) } + assert_no_queries do + assert_equal general, members.first.club_category + end + end + + def test_distinct_has_many_through_a_has_many_through_association_on_source_reflection + author = authors(:david) + assert_equal [tags(:general)], author.distinct_tags + end + + def test_distinct_has_many_through_a_has_many_through_association_on_through_reflection + author = authors(:david) + assert_equal [subscribers(:first), subscribers(:second)], + author.distinct_subscribers.order('subscribers.nick') + end + + def test_nested_has_many_through_with_a_table_referenced_multiple_times + author = authors(:bob) + assert_equal [posts(:misc_by_bob), posts(:misc_by_mary), posts(:other_by_bob), posts(:other_by_mary)], + author.similar_posts.sort_by(&:id) + + # Mary and Bob both have posts in misc, but they are the only ones. + authors = Author.joins(:similar_posts).where('posts.id' => posts(:misc_by_bob).id) + assert_equal [authors(:mary), authors(:bob)], authors.uniq.sort_by(&:id) + + # Check the polymorphism of taggings is being observed correctly (in both joins) + authors = Author.joins(:similar_posts).where('taggings.taggable_type' => 'FakeModel') + assert authors.empty? + authors = Author.joins(:similar_posts).where('taggings_authors_join.taggable_type' => 'FakeModel') + assert authors.empty? + end + + def test_has_many_through_with_foreign_key_option_on_through_reflection + assert_equal [posts(:welcome), posts(:authorless)], people(:david).agents_posts.order('posts.id') + assert_equal [authors(:david)], references(:david_unicyclist).agents_posts_authors + + references = Reference.joins(:agents_posts_authors).where('authors.id' => authors(:david).id) + assert_equal [references(:david_unicyclist)], references + end + + def test_has_many_through_with_foreign_key_option_on_source_reflection + assert_equal [people(:michael), people(:susan)], jobs(:unicyclist).agents.order('people.id') + + jobs = Job.joins(:agents) + assert_equal [jobs(:unicyclist), jobs(:unicyclist)], jobs + end + + def test_has_many_through_with_sti_on_through_reflection + ratings = posts(:sti_comments).special_comments_ratings.sort_by(&:id) + assert_equal [ratings(:special_comment_rating), ratings(:sub_special_comment_rating)], ratings + + # Ensure STI is respected in the join + scope = Post.joins(:special_comments_ratings).where(:id => posts(:sti_comments).id) + assert scope.where("comments.type" => "Comment").empty? + assert !scope.where("comments.type" => "SpecialComment").empty? + assert !scope.where("comments.type" => "SubSpecialComment").empty? + end + + def test_nested_has_many_through_writers_should_raise_error + david = authors(:david) + subscriber = subscribers(:first) + + assert_raises(ActiveRecord::HasManyThroughNestedAssociationsAreReadonly) do + david.subscribers = [subscriber] + end + + assert_raises(ActiveRecord::HasManyThroughNestedAssociationsAreReadonly) do + david.subscriber_ids = [subscriber.id] + end + + assert_raises(ActiveRecord::HasManyThroughNestedAssociationsAreReadonly) do + david.subscribers << subscriber + end + + assert_raises(ActiveRecord::HasManyThroughNestedAssociationsAreReadonly) do + david.subscribers.delete(subscriber) + end + + assert_raises(ActiveRecord::HasManyThroughNestedAssociationsAreReadonly) do + david.subscribers.clear + end + + assert_raises(ActiveRecord::HasManyThroughNestedAssociationsAreReadonly) do + david.subscribers.build + end + + assert_raises(ActiveRecord::HasManyThroughNestedAssociationsAreReadonly) do + david.subscribers.create + end + end + + def test_nested_has_one_through_writers_should_raise_error + groucho = members(:groucho) + founding = member_types(:founding) + + assert_raises(ActiveRecord::HasManyThroughNestedAssociationsAreReadonly) do + groucho.nested_member_type = founding + end + end + + def test_nested_has_many_through_with_conditions_on_through_associations + blue, bob = tags(:blue), authors(:bob) + + assert_equal [blue], bob.misc_post_first_blue_tags + + # Pointless condition to force single-query loading + assert_includes_and_joins_equal( + Author.where('tags.id = tags.id'), + [bob], :misc_post_first_blue_tags + ) + + assert Author.where('tags.id' => 100).joins(:misc_post_first_blue_tags).empty? + + authors = assert_queries(3) { Author.includes(:misc_post_first_blue_tags).to_a.sort_by(&:id) } + assert_no_queries do + assert_equal [blue], authors[2].misc_post_first_blue_tags + end + end + + def test_nested_has_many_through_with_conditions_on_source_associations + blue, bob = tags(:blue), authors(:bob) + + assert_equal [blue], bob.misc_post_first_blue_tags_2 + + # Pointless condition to force single-query loading + assert_includes_and_joins_equal( + Author.where('tags.id = tags.id'), + [bob], :misc_post_first_blue_tags_2 + ) + + authors = assert_queries(4) { Author.includes(:misc_post_first_blue_tags_2).to_a.sort_by(&:id) } + assert_no_queries do + assert_equal [blue], authors[2].misc_post_first_blue_tags_2 + end + end + + def test_nested_has_many_through_with_foreign_key_option_on_the_source_reflection_through_reflection + assert_equal [categories(:general)], organizations(:nsa).author_essay_categories + + organizations = Organization.joins(:author_essay_categories). + where('categories.id' => categories(:general).id) + assert_equal [organizations(:nsa)], organizations + + assert_equal categories(:general), organizations(:nsa).author_owned_essay_category + + organizations = Organization.joins(:author_owned_essay_category). + where('categories.id' => categories(:general).id) + assert_equal [organizations(:nsa)], organizations + end + + private + + def assert_includes_and_joins_equal(query, expected, association) + actual = assert_queries(1) { query.joins(association).to_a.uniq } + assert_equal expected, actual + + actual = assert_queries(1) { query.includes(association).to_a.uniq } + assert_equal expected, actual + end +end |