require "cases/helper" require "models/tag" require "models/tagging" require "models/post" require "models/topic" require "models/comment" require "models/author" require "models/entrant" require "models/developer" require "models/computer" require "models/reply" require "models/company" require "models/bird" require "models/car" require "models/engine" require "models/tyre" require "models/minivan" require "models/aircraft" require "models/possession" require "models/reader" require "models/categorization" require "models/edge" class RelationTest < ActiveRecord::TestCase fixtures :authors, :topics, :entrants, :developers, :companies, :developers_projects, :accounts, :categories, :categorizations, :posts, :comments, :tags, :taggings, :cars, :minivans class TopicWithCallbacks < ActiveRecord::Base self.table_name = :topics before_update { |topic| topic.author_name = "David" if topic.author_name.blank? } end def test_do_not_double_quote_string_id van = Minivan.last assert van assert_equal van.id, Minivan.where(minivan_id: van).to_a.first.minivan_id end def test_do_not_double_quote_string_id_with_array van = Minivan.last assert van assert_equal van, Minivan.where(minivan_id: [van]).to_a.first end def test_two_scopes_with_includes_should_not_drop_any_include # heat habtm cache car = Car.incl_engines.incl_tyres.first car.tyres.length car.engines.length car = Car.incl_engines.incl_tyres.first assert_no_queries { car.tyres.length } assert_no_queries { car.engines.length } end def test_dynamic_finder x = Post.where("author_id = ?", 1) assert x.klass.respond_to?(:find_by_id), "@klass should handle dynamic finders" end def test_multivalue_where posts = Post.where("author_id = ? AND id = ?", 1, 1) assert_equal 1, posts.to_a.size end def test_scoped topics = Topic.all assert_kind_of ActiveRecord::Relation, topics assert_equal 5, topics.size end def test_to_json assert_nothing_raised { Bird.all.to_json } assert_nothing_raised { Bird.all.to_a.to_json } end def test_to_yaml assert_nothing_raised { Bird.all.to_yaml } assert_nothing_raised { Bird.all.to_a.to_yaml } end def test_to_xml assert_nothing_raised { Bird.all.to_xml } assert_nothing_raised { Bird.all.to_a.to_xml } end def test_scoped_all topics = Topic.all.to_a assert_kind_of Array, topics assert_no_queries { assert_equal 5, topics.size } end def test_loaded_all topics = Topic.all assert_queries(1) do 2.times { assert_equal 5, topics.to_a.size } end assert topics.loaded? end def test_scoped_first topics = Topic.all.order("id ASC") assert_queries(1) do 2.times { assert_equal "The First Topic", topics.first.title } end assert ! topics.loaded? end def test_loaded_first topics = Topic.all.order("id ASC") topics.to_a # force load assert_no_queries do assert_equal "The First Topic", topics.first.title end assert topics.loaded? end def test_loaded_first_with_limit topics = Topic.all.order("id ASC") topics.to_a # force load assert_no_queries do assert_equal ["The First Topic", "The Second Topic of the day"], topics.first(2).map(&:title) end assert topics.loaded? end def test_first_get_more_than_available topics = Topic.all.order("id ASC") unloaded_first = topics.first(10) topics.to_a # force load assert_no_queries do loaded_first = topics.first(10) assert_equal unloaded_first, loaded_first end end def test_reload topics = Topic.all assert_queries(1) do 2.times { topics.to_a } end assert topics.loaded? original_size = topics.to_a.size Topic.create! title: "fake" assert_queries(1) { topics.reload } assert_equal original_size + 1, topics.size assert topics.loaded? end def test_finding_with_subquery relation = Topic.where(approved: true) assert_equal relation.to_a, Topic.select("*").from(relation).to_a assert_equal relation.to_a, Topic.select("subquery.*").from(relation).to_a assert_equal relation.to_a, Topic.select("a.*").from(relation, :a).to_a end def test_finding_with_subquery_with_binds relation = Post.first.comments assert_equal relation.to_a, Comment.select("*").from(relation).to_a assert_equal relation.to_a, Comment.select("subquery.*").from(relation).to_a assert_equal relation.to_a, Comment.select("a.*").from(relation, :a).to_a end def test_finding_with_subquery_without_select_does_not_change_the_select relation = Topic.where(approved: true) assert_raises(ActiveRecord::StatementInvalid) do Topic.from(relation).to_a end end def test_select_with_subquery_in_from_does_not_use_original_table_name relation = Comment.group(:type).select("COUNT(post_id) AS post_count, type") subquery = Comment.from(relation).select("type","post_count") assert_equal(relation.map(&:post_count).sort,subquery.map(&:post_count).sort) end def test_group_with_subquery_in_from_does_not_use_original_table_name relation = Comment.group(:type).select("COUNT(post_id) AS post_count,type") subquery = Comment.from(relation).group("type").average("post_count") assert_equal(relation.map(&:post_count).sort,subquery.values.sort) end def test_finding_with_conditions assert_equal ["David"], Author.where(name: "David").map(&:name) assert_equal ["Mary"], Author.where(["name = ?", "Mary"]).map(&:name) assert_equal ["Mary"], Author.where("name = ?", "Mary").map(&:name) end def test_finding_with_order topics = Topic.order("id") assert_equal 5, topics.to_a.size assert_equal topics(:first).title, topics.first.title end def test_finding_with_arel_order topics = Topic.order(Topic.arel_table[:id].asc) assert_equal 5, topics.to_a.size assert_equal topics(:first).title, topics.first.title end def test_finding_with_assoc_order topics = Topic.order(id: :desc) assert_equal 5, topics.to_a.size assert_equal topics(:fifth).title, topics.first.title end def test_finding_with_reverted_assoc_order topics = Topic.order(id: :asc).reverse_order assert_equal 5, topics.to_a.size assert_equal topics(:fifth).title, topics.first.title end def test_reverse_order_with_function topics = Topic.order("length(title)").reverse_order assert_equal topics(:second).title, topics.first.title end def test_reverse_order_with_function_other_predicates topics = Topic.order("author_name, length(title), id").reverse_order assert_equal topics(:second).title, topics.first.title topics = Topic.order("length(author_name), id, length(title)").reverse_order assert_equal topics(:fifth).title, topics.first.title end def test_reverse_order_with_multiargument_function assert_raises(ActiveRecord::IrreversibleOrderError) do Topic.order("concat(author_name, title)").reverse_order end end def test_reverse_order_with_nulls_first_or_last assert_raises(ActiveRecord::IrreversibleOrderError) do Topic.order("title NULLS FIRST").reverse_order end assert_raises(ActiveRecord::IrreversibleOrderError) do Topic.order("title nulls last").reverse_order end end def test_default_reverse_order_on_table_without_primary_key assert_raises(ActiveRecord::IrreversibleOrderError) do Edge.all.reverse_order end end def test_order_with_hash_and_symbol_generates_the_same_sql assert_equal Topic.order(:id).to_sql, Topic.order(id: :asc).to_sql end def test_finding_with_desc_order_with_string topics = Topic.order(id: "desc") assert_equal 5, topics.to_a.size assert_equal [topics(:fifth), topics(:fourth), topics(:third), topics(:second), topics(:first)], topics.to_a end def test_finding_with_asc_order_with_string topics = Topic.order(id: "asc") assert_equal 5, topics.to_a.size assert_equal [topics(:first), topics(:second), topics(:third), topics(:fourth), topics(:fifth)], topics.to_a end def test_support_upper_and_lower_case_directions assert_includes Topic.order(id: "ASC").to_sql, "ASC" assert_includes Topic.order(id: "asc").to_sql, "ASC" assert_includes Topic.order(id: :ASC).to_sql, "ASC" assert_includes Topic.order(id: :asc).to_sql, "ASC" assert_includes Topic.order(id: "DESC").to_sql, "DESC" assert_includes Topic.order(id: "desc").to_sql, "DESC" assert_includes Topic.order(id: :DESC).to_sql, "DESC" assert_includes Topic.order(id: :desc).to_sql,"DESC" end def test_raising_exception_on_invalid_hash_params e = assert_raise(ArgumentError) { Topic.order(:name, "id DESC", id: :asfsdf) } assert_equal 'Direction "asfsdf" is invalid. Valid directions are: [:asc, :desc, :ASC, :DESC, "asc", "desc", "ASC", "DESC"]', e.message end def test_finding_last_with_arel_order topics = Topic.order(Topic.arel_table[:id].asc) assert_equal topics(:fifth).title, topics.last.title end def test_finding_with_order_concatenated topics = Topic.order("author_name").order("title") assert_equal 5, topics.to_a.size assert_equal topics(:fourth).title, topics.first.title end def test_finding_with_order_by_aliased_attributes topics = Topic.order(:heading) assert_equal 5, topics.to_a.size assert_equal topics(:fifth).title, topics.first.title end def test_finding_with_assoc_order_by_aliased_attributes topics = Topic.order(heading: :desc) assert_equal 5, topics.to_a.size assert_equal topics(:third).title, topics.first.title end def test_finding_with_reorder topics = Topic.order("author_name").order("title").reorder("id").to_a topics_titles = topics.map(&:title) assert_equal ["The First Topic", "The Second Topic of the day", "The Third Topic of the day", "The Fourth Topic of the day", "The Fifth Topic of the day"], topics_titles end def test_finding_with_reorder_by_aliased_attributes topics = Topic.order("author_name").reorder(:heading) assert_equal 5, topics.to_a.size assert_equal topics(:fifth).title, topics.first.title end def test_finding_with_assoc_reorder_by_aliased_attributes topics = Topic.order("author_name").reorder(heading: :desc) assert_equal 5, topics.to_a.size assert_equal topics(:third).title, topics.first.title end def test_finding_with_order_and_take entrants = Entrant.order("id ASC").limit(2).to_a assert_equal 2, entrants.size assert_equal entrants(:first).name, entrants.first.name end def test_finding_with_cross_table_order_and_limit tags = Tag.includes(:taggings). order("tags.name asc", "taggings.taggable_id asc", "REPLACE('abc', taggings.taggable_type, taggings.taggable_type)"). limit(1).to_a assert_equal 1, tags.length end def test_finding_with_complex_order_and_limit tags = Tag.includes(:taggings).references(:taggings).order("REPLACE('abc', taggings.taggable_type, taggings.taggable_type)").limit(1).to_a assert_equal 1, tags.length end def test_finding_with_complex_order tags = Tag.includes(:taggings).references(:taggings).order("REPLACE('abc', taggings.taggable_type, taggings.taggable_type)").to_a assert_equal 3, tags.length end def test_finding_with_sanitized_order query = Tag.order(["field(id, ?)", [1,3,2]]).to_sql assert_match(/field\(id, 1,3,2\)/, query) query = Tag.order(["field(id, ?)", []]).to_sql assert_match(/field\(id, NULL\)/, query) query = Tag.order(["field(id, ?)", nil]).to_sql assert_match(/field\(id, NULL\)/, query) end def test_finding_with_order_limit_and_offset entrants = Entrant.order("id ASC").limit(2).offset(1) assert_equal 2, entrants.to_a.size assert_equal entrants(:second).name, entrants.first.name entrants = Entrant.order("id ASC").limit(2).offset(2) assert_equal 1, entrants.to_a.size assert_equal entrants(:third).name, entrants.first.name end def test_finding_with_group developers = Developer.group("salary").select("salary").to_a assert_equal 4, developers.size assert_equal 4, developers.map(&:salary).uniq.size end def test_select_with_block even_ids = Developer.all.select { |d| d.id % 2 == 0 }.map(&:id) assert_equal [2, 4, 6, 8, 10], even_ids.sort end def test_none assert_no_queries(ignore_none: false) do assert_equal [], Developer.none assert_equal [], Developer.all.none end end def test_none_chainable assert_no_queries(ignore_none: false) do assert_equal [], Developer.none.where(name: "David") end end def test_none_chainable_to_existing_scope_extension_method assert_no_queries(ignore_none: false) do assert_equal 1, Topic.anonymous_extension.none.one end end def test_none_chained_to_methods_firing_queries_straight_to_db assert_no_queries(ignore_none: false) do assert_equal [], Developer.none.pluck(:id, :name) assert_equal 0, Developer.none.delete_all assert_equal 0, Developer.none.update_all(name: "David") assert_equal 0, Developer.none.delete(1) assert_equal false, Developer.none.exists?(1) end end def test_null_relation_content_size_methods assert_no_queries(ignore_none: false) do assert_equal 0, Developer.none.size assert_equal 0, Developer.none.count assert_equal true, Developer.none.empty? assert_equal true, Developer.none.none? assert_equal false, Developer.none.any? assert_equal false, Developer.none.one? assert_equal false, Developer.none.many? end end def test_null_relation_calculations_methods assert_no_queries(ignore_none: false) do assert_equal 0, Developer.none.count assert_equal 0, Developer.none.calculate(:count, nil) assert_equal nil, Developer.none.calculate(:average, "salary") end end def test_null_relation_metadata_methods assert_equal "", Developer.none.to_sql assert_equal({}, Developer.none.where_values_hash) end def test_null_relation_where_values_hash assert_equal({ "salary" => 100_000 }, Developer.none.where(salary: 100_000).where_values_hash) end def test_null_relation_sum ac = Aircraft.new assert_equal Hash.new, ac.engines.group(:id).sum(:id) assert_equal 0, ac.engines.count ac.save assert_equal Hash.new, ac.engines.group(:id).sum(:id) assert_equal 0, ac.engines.count end def test_null_relation_count ac = Aircraft.new assert_equal Hash.new, ac.engines.group(:id).count assert_equal 0, ac.engines.count ac.save assert_equal Hash.new, ac.engines.group(:id).count assert_equal 0, ac.engines.count end def test_null_relation_size ac = Aircraft.new assert_equal Hash.new, ac.engines.group(:id).size assert_equal 0, ac.engines.size ac.save assert_equal Hash.new, ac.engines.group(:id).size assert_equal 0, ac.engines.size end def test_null_relation_average ac = Aircraft.new assert_equal Hash.new, ac.engines.group(:car_id).average(:id) assert_equal nil, ac.engines.average(:id) ac.save assert_equal Hash.new, ac.engines.group(:car_id).average(:id) assert_equal nil, ac.engines.average(:id) end def test_null_relation_minimum ac = Aircraft.new assert_equal Hash.new, ac.engines.group(:car_id).minimum(:id) assert_equal nil, ac.engines.minimum(:id) ac.save assert_equal Hash.new, ac.engines.group(:car_id).minimum(:id) assert_equal nil, ac.engines.minimum(:id) end def test_null_relation_maximum ac = Aircraft.new assert_equal Hash.new, ac.engines.group(:car_id).maximum(:id) assert_equal nil, ac.engines.maximum(:id) ac.save assert_equal Hash.new, ac.engines.group(:car_id).maximum(:id) assert_equal nil, ac.engines.maximum(:id) end def test_null_relation_in_where_condition assert_operator Comment.count, :>, 0 # precondition, make sure there are comments. assert_equal 0, Comment.where(post_id: Post.none).to_a.size end def test_joins_with_nil_argument assert_nothing_raised { DependentFirm.joins(nil).first } end def test_finding_with_hash_conditions_on_joined_table firms = DependentFirm.joins(:account).where(name: "RailsCore", accounts: { credit_limit: 55..60 }).to_a assert_equal 1, firms.size assert_equal companies(:rails_core), firms.first end def test_find_all_with_join developers_on_project_one = Developer.joins("LEFT JOIN developers_projects ON developers.id = developers_projects.developer_id"). where("project_id=1").to_a assert_equal 3, developers_on_project_one.length developer_names = developers_on_project_one.map(&:name) assert developer_names.include?("David") assert developer_names.include?("Jamis") end def test_find_on_hash_conditions assert_equal Topic.all.merge!(where: { approved: false }).to_a, Topic.where(approved: false).to_a end def test_joins_with_string_array person_with_reader_and_post = Post.joins([ "INNER JOIN categorizations ON categorizations.post_id = posts.id", "INNER JOIN categories ON categories.id = categorizations.category_id AND categories.type = 'SpecialCategory'" ] ).to_a assert_equal 1, person_with_reader_and_post.size end def test_no_arguments_to_query_methods_raise_errors assert_raises(ArgumentError) { Topic.references() } assert_raises(ArgumentError) { Topic.includes() } assert_raises(ArgumentError) { Topic.preload() } assert_raises(ArgumentError) { Topic.group() } assert_raises(ArgumentError) { Topic.reorder() } end def test_blank_like_arguments_to_query_methods_dont_raise_errors assert_nothing_raised { Topic.references([]) } assert_nothing_raised { Topic.includes([]) } assert_nothing_raised { Topic.preload([]) } assert_nothing_raised { Topic.group([]) } assert_nothing_raised { Topic.reorder([]) } end def test_scoped_responds_to_delegated_methods relation = Topic.all ["map", "uniq", "sort", "insert", "delete", "update"].each do |method| assert_respond_to relation, method, "Topic.all should respond to #{method.inspect}" end end def test_respond_to_delegates_to_relation relation = Topic.all fake_arel = Struct.new(:responds) { def respond_to?(method, access = false) responds << [method, access] end }.new [] relation.extend(Module.new { attr_accessor :arel }) relation.arel = fake_arel relation.respond_to?(:matching_attributes) assert_equal [:matching_attributes, false], fake_arel.responds.first fake_arel.responds = [] relation.respond_to?(:matching_attributes, true) assert_equal [:matching_attributes, true], fake_arel.responds.first end def test_respond_to_dynamic_finders relation = Topic.all ["find_by_title", "find_by_title_and_author_name"].each do |method| assert_respond_to relation, method, "Topic.all should respond to #{method.inspect}" end end def test_respond_to_class_methods_and_scopes assert Topic.all.respond_to?(:by_lifo) end def test_find_with_readonly_option Developer.all.each { |d| assert !d.readonly? } Developer.all.readonly.each { |d| assert d.readonly? } end def test_eager_association_loading_of_stis_with_multiple_references authors = Author.eager_load(posts: { special_comments: { post: [ :special_comments, :very_special_comment ] } }). order("comments.body, very_special_comments_posts.body").where("posts.id = 4").to_a assert_equal [authors(:david)], authors assert_no_queries do authors.first.posts.first.special_comments.first.post.special_comments authors.first.posts.first.special_comments.first.post.very_special_comment end end def test_find_with_preloaded_associations assert_queries(2) do posts = Post.preload(:comments).order("posts.id") assert posts.first.comments.first end assert_queries(2) do posts = Post.preload(:comments).order("posts.id") assert posts.first.comments.first end assert_queries(2) do posts = Post.preload(:author).order("posts.id") assert posts.first.author end assert_queries(2) do posts = Post.preload(:author).order("posts.id") assert posts.first.author end assert_queries(3) do posts = Post.preload(:author, :comments).order("posts.id") assert posts.first.author assert posts.first.comments.first end end def test_preload_applies_to_all_chained_preloaded_scopes assert_queries(3) do post = Post.with_comments.with_tags.first assert post end end def test_find_with_included_associations assert_queries(2) do posts = Post.includes(:comments).order("posts.id") assert posts.first.comments.first end assert_queries(2) do posts = Post.all.includes(:comments).order("posts.id") assert posts.first.comments.first end assert_queries(2) do posts = Post.includes(:author).order("posts.id") assert posts.first.author end assert_queries(3) do posts = Post.includes(:author, :comments).order("posts.id") assert posts.first.author assert posts.first.comments.first end end def test_default_scope_with_conditions_string assert_equal Developer.where(name: "David").map(&:id).sort, DeveloperCalledDavid.all.map(&:id).sort assert_nil DeveloperCalledDavid.create!.name end def test_default_scope_with_conditions_hash assert_equal Developer.where(name: "Jamis").map(&:id).sort, DeveloperCalledJamis.all.map(&:id).sort assert_equal "Jamis", DeveloperCalledJamis.create!.name end def test_default_scoping_finder_methods developers = DeveloperCalledDavid.order("id").map(&:id).sort assert_equal Developer.where(name: "David").map(&:id).sort, developers end def test_includes_with_select query = Post.select("comments_count AS ranking").order("ranking").includes(:comments) .where(comments: { id: 1 }) assert_equal ["comments_count AS ranking"], query.select_values assert_equal 1, query.to_a.size end def test_preloading_with_associations_and_merges post = Post.create! title: "Uhuu", body: "body" reader = Reader.create! post_id: post.id, person_id: 1 comment = Comment.create! post_id: post.id, body: "body" assert !comment.respond_to?(:readers) post_rel = Post.preload(:readers).joins(:readers).where(title: "Uhuu") result_comment = Comment.joins(:post).merge(post_rel).to_a.first assert_equal comment, result_comment assert_no_queries do assert_equal post, result_comment.post assert_equal [reader], result_comment.post.readers.to_a end post_rel = Post.includes(:readers).where(title: "Uhuu") result_comment = Comment.joins(:post).merge(post_rel).first assert_equal comment, result_comment assert_no_queries do assert_equal post, result_comment.post assert_equal [reader], result_comment.post.readers.to_a end end def test_preloading_with_associations_default_scopes_and_merges post = Post.create! title: "Uhuu", body: "body" reader = Reader.create! post_id: post.id, person_id: 1 post_rel = PostWithPreloadDefaultScope.preload(:readers).joins(:readers).where(title: "Uhuu") result_post = PostWithPreloadDefaultScope.all.merge(post_rel).to_a.first assert_no_queries do assert_equal [reader], result_post.readers.to_a end post_rel = PostWithIncludesDefaultScope.includes(:readers).where(title: "Uhuu") result_post = PostWithIncludesDefaultScope.all.merge(post_rel).to_a.first assert_no_queries do assert_equal [reader], result_post.readers.to_a end end def test_loading_with_one_association posts = Post.preload(:comments) post = posts.find { |p| p.id == 1 } assert_equal 2, post.comments.size assert post.comments.include?(comments(:greetings)) post = Post.where("posts.title = 'Welcome to the weblog'").preload(:comments).first assert_equal 2, post.comments.size assert post.comments.include?(comments(:greetings)) posts = Post.preload(:last_comment) post = posts.find { |p| p.id == 1 } assert_equal Post.find(1).last_comment, post.last_comment end def test_to_sql_on_eager_join expected = assert_sql { Post.eager_load(:last_comment).order("comments.id DESC").to_a }.first actual = Post.eager_load(:last_comment).order("comments.id DESC").to_sql assert_equal expected, actual end def test_to_sql_on_scoped_proxy auth = Author.first Post.where("1=1").written_by(auth) assert_not auth.posts.to_sql.include?("1=1") end def test_loading_with_one_association_with_non_preload posts = Post.eager_load(:last_comment).order("comments.id DESC") post = posts.find { |p| p.id == 1 } assert_equal Post.find(1).last_comment, post.last_comment end def test_dynamic_find_by_attributes david = authors(:david) author = Author.preload(:taggings).find_by_id(david.id) expected_taggings = taggings(:welcome_general, :thinking_general) assert_no_queries do assert_equal expected_taggings, author.taggings.distinct.sort_by(&:id) assert_equal expected_taggings, author.taggings.uniq.sort_by(&:id) end authors = Author.all assert_equal david, authors.find_by_id_and_name(david.id, david.name) assert_equal david, authors.find_by_id_and_name!(david.id, david.name) end def test_dynamic_find_by_attributes_bang author = Author.all.find_by_id!(authors(:david).id) assert_equal "David", author.name assert_raises(ActiveRecord::RecordNotFound) { Author.all.find_by_id_and_name!(20, "invalid") } end def test_find_id authors = Author.all david = authors.find(authors(:david).id) assert_equal "David", david.name assert_raises(ActiveRecord::RecordNotFound) { authors.where(name: "lifo").find("42") } end def test_find_ids authors = Author.order("id ASC") results = authors.find(authors(:david).id, authors(:mary).id) assert_kind_of Array, results assert_equal 2, results.size assert_equal "David", results[0].name assert_equal "Mary", results[1].name assert_equal results, authors.find([authors(:david).id, authors(:mary).id]) assert_raises(ActiveRecord::RecordNotFound) { authors.where(name: "lifo").find(authors(:david).id, "42") } assert_raises(ActiveRecord::RecordNotFound) { authors.find(["42", 43]) } end def test_find_in_empty_array authors = Author.all.where(id: []) assert authors.to_a.blank? end def test_where_with_ar_object author = Author.first authors = Author.all.where(id: author) assert_equal 1, authors.to_a.length end def test_find_with_list_of_ar author = Author.first authors = Author.find([author.id]) assert_equal author, authors.first end class Mary < Author; end def test_find_by_classname Author.create!(name: Mary.name) assert_deprecated do assert_equal 1, Author.where(name: Mary).size end end def test_find_by_id_with_list_of_ar author = Author.first authors = Author.find_by_id([author]) assert_equal author, authors end def test_find_all_using_where_twice_should_or_the_relation david = authors(:david) relation = Author.unscoped relation = relation.where(name: david.name) relation = relation.where(name: "Santiago") relation = relation.where(id: david.id) assert_equal [], relation.to_a end def test_multi_where_ands_queries relation = Author.unscoped david = authors(:david) sql = relation.where(name: david.name).where(name: "Santiago").to_sql assert_match("AND", sql) end def test_find_all_with_multiple_should_use_and david = authors(:david) relation = [ { name: david.name }, { name: "Santiago" }, { name: "tenderlove" }, ].inject(Author.unscoped) do |memo, param| memo.where(param) end assert_equal [], relation.to_a end def test_typecasting_where_with_array ids = Author.pluck(:id) slugs = ids.map { |id| "#{id}-as-a-slug" } assert_equal Author.all.to_a, Author.where(id: slugs).to_a end def test_find_all_using_where_with_relation david = authors(:david) # switching the lines below would succeed in current rails # assert_queries(2) { assert_queries(1) { relation = Author.where(id: Author.where(id: david.id)) assert_equal [david], relation.to_a } assert_queries(1) { relation = Author.where("id in (?)", Author.where(id: david).select(:id)) assert_equal [david], relation.to_a } assert_queries(1) do relation = Author.where("id in (:author_ids)", author_ids: Author.where(id: david).select(:id)) assert_equal [david], relation.to_a end end def test_find_all_using_where_with_relation_with_bound_values david = authors(:david) davids_posts = david.posts.order(:id).to_a assert_queries(1) do relation = Post.where(id: david.posts.select(:id)) assert_equal davids_posts, relation.order(:id).to_a end assert_queries(1) do relation = Post.where("id in (?)", david.posts.select(:id)) assert_equal davids_posts, relation.order(:id).to_a, "should process Relation as bind variables" end assert_queries(1) do relation = Post.where("id in (:post_ids)", post_ids: david.posts.select(:id)) assert_equal davids_posts, relation.order(:id).to_a, "should process Relation as named bind variables" end end def test_find_all_using_where_with_relation_and_alternate_primary_key cool_first = minivans(:cool_first) # switching the lines below would succeed in current rails # assert_queries(2) { assert_queries(1) { relation = Minivan.where(minivan_id: Minivan.where(name: cool_first.name)) assert_equal [cool_first], relation.to_a } end def test_find_all_using_where_with_relation_does_not_alter_select_values david = authors(:david) subquery = Author.where(id: david.id) assert_queries(1) { relation = Author.where(id: subquery) assert_equal [david], relation.to_a } assert_equal 0, subquery.select_values.size end def test_find_all_using_where_with_relation_with_joins david = authors(:david) assert_queries(1) { relation = Author.where(id: Author.joins(:posts).where(id: david.id)) assert_equal [david], relation.to_a } end def test_find_all_using_where_with_relation_with_select_to_build_subquery david = authors(:david) assert_queries(1) { relation = Author.where(name: Author.where(id: david.id).select(:name)) assert_equal [david], relation.to_a } end def test_exists davids = Author.where(name: "David") assert davids.exists? assert davids.exists?(authors(:david).id) assert ! davids.exists?(authors(:mary).id) assert ! davids.exists?("42") assert ! davids.exists?(42) assert ! davids.exists?(davids.new.id) fake = Author.where(name: "fake author") assert ! fake.exists? assert ! fake.exists?(authors(:david).id) end def test_exists_uses_existing_scope post = authors(:david).posts.first authors = Author.includes(:posts).where(name: "David", posts: { id: post.id }) assert authors.exists?(authors(:david).id) end def test_any_with_scope_on_hash_includes post = authors(:david).posts.first categories = Categorization.includes(author: :posts).where(posts: { id: post.id }) assert categories.exists? end def test_last authors = Author.all assert_equal authors(:bob), authors.last end def test_destroy_all davids = Author.where(name: "David") # Force load assert_equal [authors(:david)], davids.to_a assert davids.loaded? assert_difference("Author.count", -1) { davids.destroy_all } assert_equal [], davids.to_a assert davids.loaded? end def test_destroy_all_with_conditions_is_deprecated assert_deprecated do assert_difference("Author.count", -1) { Author.destroy_all(name: "David") } end end def test_delete_all davids = Author.where(name: "David") assert_difference("Author.count", -1) { davids.delete_all } assert ! davids.loaded? end def test_delete_all_with_conditions_is_deprecated assert_deprecated do assert_difference("Author.count", -1) { Author.delete_all(name: "David") } end end def test_delete_all_loaded davids = Author.where(name: "David") # Force load assert_equal [authors(:david)], davids.to_a assert davids.loaded? assert_difference("Author.count", -1) { davids.delete_all } assert_equal [], davids.to_a assert davids.loaded? end def test_delete_all_with_unpermitted_relation_raises_error assert_raises(ActiveRecord::ActiveRecordError) { Author.limit(10).delete_all } assert_raises(ActiveRecord::ActiveRecordError) { Author.distinct.delete_all } assert_raises(ActiveRecord::ActiveRecordError) { Author.group(:name).delete_all } assert_raises(ActiveRecord::ActiveRecordError) { Author.having("SUM(id) < 3").delete_all } assert_raises(ActiveRecord::ActiveRecordError) { Author.offset(10).delete_all } end def test_select_with_aggregates posts = Post.select(:title, :body) assert_equal 11, posts.count(:all) assert_equal 11, posts.size assert posts.any? assert posts.many? assert_not posts.empty? end def test_select_takes_a_variable_list_of_args david = developers(:david) developer = Developer.where(id: david.id).select(:name, :salary).first assert_equal david.name, developer.name assert_equal david.salary, developer.salary end def test_select_takes_an_aliased_attribute first = topics(:first) topic = Topic.where(id: first.id).select(:heading).first assert_equal first.heading, topic.heading end def test_select_argument_error assert_raises(ArgumentError) { Developer.select } end def test_count posts = Post.all assert_equal 11, posts.count assert_equal 11, posts.count(:all) assert_equal 11, posts.count(:id) assert_equal 1, posts.where("comments_count > 1").count assert_equal 9, posts.where(comments_count: 0).count end def test_count_with_block posts = Post.all assert_equal 10, posts.count { |p| p.comments_count.even? } end def test_count_on_association_relation author = Author.last another_author = Author.first posts = Post.where(author_id: author.id) assert_equal author.posts.where(author_id: author.id).size, posts.count assert_equal 0, author.posts.where(author_id: another_author.id).size assert author.posts.where(author_id: another_author.id).empty? end def test_count_with_distinct posts = Post.all assert_equal 3, posts.distinct(true).count(:comments_count) assert_equal 11, posts.distinct(false).count(:comments_count) assert_equal 3, posts.distinct(true).select(:comments_count).count assert_equal 11, posts.distinct(false).select(:comments_count).count end def test_update_all_with_scope tag = Tag.first Post.tagged_with(tag.id).update_all title: "rofl" list = Post.tagged_with(tag.id).all.to_a assert_operator list.length, :>, 0 list.each { |post| assert_equal "rofl", post.title } end def test_count_explicit_columns Post.update_all(comments_count: nil) posts = Post.all assert_equal [0], posts.select("comments_count").where("id is not null").group("id").order("id").count.values.uniq assert_equal 0, posts.where("id is not null").select("comments_count").count assert_equal 11, posts.select("comments_count").count("id") assert_equal 0, posts.select("comments_count").count assert_equal 0, posts.count(:comments_count) assert_equal 0, posts.count("comments_count") end def test_multiple_selects post = Post.all.select("comments_count").select("title").order("id ASC").first assert_equal "Welcome to the weblog", post.title assert_equal 2, post.comments_count end def test_size posts = Post.all assert_queries(1) { assert_equal 11, posts.size } assert ! posts.loaded? best_posts = posts.where(comments_count: 0) best_posts.to_a # force load assert_no_queries { assert_equal 9, best_posts.size } end def test_size_with_limit posts = Post.limit(10) assert_queries(1) { assert_equal 10, posts.size } assert ! posts.loaded? best_posts = posts.where(comments_count: 0) best_posts.to_a # force load assert_no_queries { assert_equal 9, best_posts.size } end def test_size_with_zero_limit posts = Post.limit(0) assert_no_queries { assert_equal 0, posts.size } assert ! posts.loaded? posts.to_a # force load assert_no_queries { assert_equal 0, posts.size } end def test_empty_with_zero_limit posts = Post.limit(0) assert_no_queries { assert_equal true, posts.empty? } assert ! posts.loaded? end def test_count_complex_chained_relations posts = Post.select("comments_count").where("id is not null").group("author_id").where("comments_count > 0") expected = { 1 => 2 } assert_equal expected, posts.count end def test_empty posts = Post.all assert_queries(1) { assert_equal false, posts.empty? } assert ! posts.loaded? no_posts = posts.where(title: "") assert_queries(1) { assert_equal true, no_posts.empty? } assert ! no_posts.loaded? best_posts = posts.where(comments_count: 0) best_posts.to_a # force load assert_no_queries { assert_equal false, best_posts.empty? } end def test_empty_complex_chained_relations posts = Post.select("comments_count").where("id is not null").group("author_id").where("comments_count > 0") assert_queries(1) { assert_equal false, posts.empty? } assert ! posts.loaded? no_posts = posts.where(title: "") assert_queries(1) { assert_equal true, no_posts.empty? } assert ! no_posts.loaded? end def test_any posts = Post.all # This test was failing when run on its own (as opposed to running the entire suite). # The second line in the assert_queries block was causing visit_Arel_Attributes_Attribute # in Arel::Visitors::ToSql to trigger a SHOW TABLES query. Running that line here causes # the SHOW TABLES result to be cached so we don't have to do it again in the block. # # This is obviously a rubbish fix but it's the best I can come up with for now... posts.where(id: nil).any? assert_queries(3) do assert posts.any? # Uses COUNT() assert ! posts.where(id: nil).any? assert posts.any? { |p| p.id > 0 } assert ! posts.any? { |p| p.id <= 0 } end assert posts.loaded? end def test_many posts = Post.all assert_queries(2) do assert posts.many? # Uses COUNT() assert posts.many? { |p| p.id > 0 } assert ! posts.many? { |p| p.id < 2 } end assert posts.loaded? end def test_many_with_limits posts = Post.all assert posts.many? assert ! posts.limit(1).many? end def test_none? posts = Post.all assert_queries(1) do assert ! posts.none? # Uses COUNT() end assert ! posts.loaded? assert_queries(1) do assert posts.none? { |p| p.id < 0 } assert ! posts.none? { |p| p.id == 1 } end assert posts.loaded? end def test_one posts = Post.all assert_queries(1) do assert ! posts.one? # Uses COUNT() end assert ! posts.loaded? assert_queries(1) do assert ! posts.one? { |p| p.id < 3 } assert posts.one? { |p| p.id == 1 } end assert posts.loaded? end def test_to_a_should_dup_target posts = Post.all original_size = posts.size removed = posts.to_a.pop assert_equal original_size, posts.size assert_includes posts.to_a, removed end def test_build posts = Post.all post = posts.new assert_kind_of Post, post end def test_scoped_build posts = Post.where(title: "You told a lie") post = posts.new assert_kind_of Post, post assert_equal "You told a lie", post.title end def test_create birds = Bird.all sparrow = birds.create assert_kind_of Bird, sparrow assert !sparrow.persisted? hen = birds.where(name: "hen").create assert hen.persisted? assert_equal "hen", hen.name end def test_create_bang birds = Bird.all assert_raises(ActiveRecord::RecordInvalid) { birds.create! } hen = birds.where(name: "hen").create! assert_kind_of Bird, hen assert hen.persisted? assert_equal "hen", hen.name end def test_first_or_create parrot = Bird.where(color: "green").first_or_create(name: "parrot") assert_kind_of Bird, parrot assert parrot.persisted? assert_equal "parrot", parrot.name assert_equal "green", parrot.color same_parrot = Bird.where(color: "green").first_or_create(name: "parakeet") assert_kind_of Bird, same_parrot assert same_parrot.persisted? assert_equal parrot, same_parrot end def test_first_or_create_with_no_parameters parrot = Bird.where(color: "green").first_or_create assert_kind_of Bird, parrot assert !parrot.persisted? assert_equal "green", parrot.color end def test_first_or_create_with_block parrot = Bird.where(color: "green").first_or_create { |bird| bird.name = "parrot" } assert_kind_of Bird, parrot assert parrot.persisted? assert_equal "green", parrot.color assert_equal "parrot", parrot.name same_parrot = Bird.where(color: "green").first_or_create { |bird| bird.name = "parakeet" } assert_equal parrot, same_parrot end def test_first_or_create_with_array several_green_birds = Bird.where(color: "green").first_or_create([{ name: "parrot" }, { name: "parakeet" }]) assert_kind_of Array, several_green_birds several_green_birds.each { |bird| assert bird.persisted? } same_parrot = Bird.where(color: "green").first_or_create([{ name: "hummingbird" }, { name: "macaw" }]) assert_kind_of Bird, same_parrot assert_equal several_green_birds.first, same_parrot end def test_first_or_create_bang_with_valid_options parrot = Bird.where(color: "green").first_or_create!(name: "parrot") assert_kind_of Bird, parrot assert parrot.persisted? assert_equal "parrot", parrot.name assert_equal "green", parrot.color same_parrot = Bird.where(color: "green").first_or_create!(name: "parakeet") assert_kind_of Bird, same_parrot assert same_parrot.persisted? assert_equal parrot, same_parrot end def test_first_or_create_bang_with_invalid_options assert_raises(ActiveRecord::RecordInvalid) { Bird.where(color: "green").first_or_create!(pirate_id: 1) } end def test_first_or_create_bang_with_no_parameters assert_raises(ActiveRecord::RecordInvalid) { Bird.where(color: "green").first_or_create! } end def test_first_or_create_bang_with_valid_block parrot = Bird.where(color: "green").first_or_create! { |bird| bird.name = "parrot" } assert_kind_of Bird, parrot assert parrot.persisted? assert_equal "green", parrot.color assert_equal "parrot", parrot.name same_parrot = Bird.where(color: "green").first_or_create! { |bird| bird.name = "parakeet" } assert_equal parrot, same_parrot end def test_first_or_create_bang_with_invalid_block assert_raise(ActiveRecord::RecordInvalid) do Bird.where(color: "green").first_or_create! { |bird| bird.pirate_id = 1 } end end def test_first_or_create_with_valid_array several_green_birds = Bird.where(color: "green").first_or_create!([{ name: "parrot" }, { name: "parakeet" }]) assert_kind_of Array, several_green_birds several_green_birds.each { |bird| assert bird.persisted? } same_parrot = Bird.where(color: "green").first_or_create!([{ name: "hummingbird" }, { name: "macaw" }]) assert_kind_of Bird, same_parrot assert_equal several_green_birds.first, same_parrot end def test_first_or_create_with_invalid_array assert_raises(ActiveRecord::RecordInvalid) { Bird.where(color: "green").first_or_create!([ { name: "parrot" }, { pirate_id: 1 } ]) } end def test_first_or_initialize parrot = Bird.where(color: "green").first_or_initialize(name: "parrot") assert_kind_of Bird, parrot assert !parrot.persisted? assert parrot.valid? assert parrot.new_record? assert_equal "parrot", parrot.name assert_equal "green", parrot.color end def test_first_or_initialize_with_no_parameters parrot = Bird.where(color: "green").first_or_initialize assert_kind_of Bird, parrot assert !parrot.persisted? assert !parrot.valid? assert parrot.new_record? assert_equal "green", parrot.color end def test_first_or_initialize_with_block parrot = Bird.where(color: "green").first_or_initialize { |bird| bird.name = "parrot" } assert_kind_of Bird, parrot assert !parrot.persisted? assert parrot.valid? assert parrot.new_record? assert_equal "green", parrot.color assert_equal "parrot", parrot.name end def test_find_or_create_by assert_nil Bird.find_by(name: "bob") bird = Bird.find_or_create_by(name: "bob") assert bird.persisted? assert_equal bird, Bird.find_or_create_by(name: "bob") end def test_find_or_create_by_with_create_with assert_nil Bird.find_by(name: "bob") bird = Bird.create_with(color: "green").find_or_create_by(name: "bob") assert bird.persisted? assert_equal "green", bird.color assert_equal bird, Bird.create_with(color: "blue").find_or_create_by(name: "bob") end def test_find_or_create_by! assert_raises(ActiveRecord::RecordInvalid) { Bird.find_or_create_by!(color: "green") } end def test_find_or_initialize_by assert_nil Bird.find_by(name: "bob") bird = Bird.find_or_initialize_by(name: "bob") assert bird.new_record? bird.save! assert_equal bird, Bird.find_or_initialize_by(name: "bob") end def test_explicit_create_scope hens = Bird.where(name: "hen") assert_equal "hen", hens.new.name hens = hens.create_with(name: "cock") assert_equal "cock", hens.new.name end def test_except relation = Post.where(author_id: 1).order("id ASC").limit(1) assert_equal [posts(:welcome)], relation.to_a author_posts = relation.except(:order, :limit) assert_equal Post.where(author_id: 1).to_a, author_posts.to_a all_posts = relation.except(:where, :order, :limit) assert_equal Post.all, all_posts end def test_only relation = Post.where(author_id: 1).order("id ASC").limit(1) assert_equal [posts(:welcome)], relation.to_a author_posts = relation.only(:where) assert_equal Post.where(author_id: 1).to_a, author_posts.to_a all_posts = relation.only(:limit) assert_equal Post.limit(1).to_a.first, all_posts.first end def test_anonymous_extension relation = Post.where(author_id: 1).order("id ASC").extending do def author "lifo" end end assert_equal "lifo", relation.author assert_equal "lifo", relation.limit(1).author end def test_named_extension relation = Post.where(author_id: 1).order("id ASC").extending(Post::NamedExtension) assert_equal "lifo", relation.author assert_equal "lifo", relation.limit(1).author end def test_order_by_relation_attribute assert_equal Post.order(Post.arel_table[:title]).to_a, Post.order("title").to_a end def test_default_scope_order_with_scope_order assert_equal "zyke", CoolCar.order_using_new_style.limit(1).first.name assert_equal "zyke", FastCar.order_using_new_style.limit(1).first.name end def test_order_using_scoping car1 = CoolCar.order("id DESC").scoping do CoolCar.all.merge!(order: "id asc").first end assert_equal "zyke", car1.name car2 = FastCar.order("id DESC").scoping do FastCar.all.merge!(order: "id asc").first end assert_equal "zyke", car2.name end def test_unscoped_block_style assert_equal "honda", CoolCar.unscoped { CoolCar.order_using_new_style.limit(1).first.name } assert_equal "honda", FastCar.unscoped { FastCar.order_using_new_style.limit(1).first.name } end def test_intersection_with_array relation = Author.where(name: "David") rails_author = relation.first assert_equal [rails_author], [rails_author] & relation assert_equal [rails_author], relation & [rails_author] end def test_primary_key assert_equal "id", Post.all.primary_key end def test_ordering_with_extra_spaces assert_equal authors(:david), Author.order("id DESC , name DESC").last end def test_update_all_with_blank_argument assert_raises(ArgumentError) { Comment.update_all({}) } end def test_update_all_with_joins comments = Comment.joins(:post).where("posts.id" => posts(:welcome).id) count = comments.count assert_equal count, comments.update_all(post_id: posts(:thinking).id) assert_equal posts(:thinking), comments(:greetings).post end def test_update_all_with_joins_and_limit comments = Comment.joins(:post).where("posts.id" => posts(:welcome).id).limit(1) assert_equal 1, comments.update_all(post_id: posts(:thinking).id) end def test_update_all_with_joins_and_limit_and_order comments = Comment.joins(:post).where("posts.id" => posts(:welcome).id).order("comments.id").limit(1) assert_equal 1, comments.update_all(post_id: posts(:thinking).id) assert_equal posts(:thinking), comments(:greetings).post assert_equal posts(:welcome), comments(:more_greetings).post end def test_update_all_with_joins_and_offset all_comments = Comment.joins(:post).where("posts.id" => posts(:welcome).id) count = all_comments.count comments = all_comments.offset(1) assert_equal count - 1, comments.update_all(post_id: posts(:thinking).id) end def test_update_all_with_joins_and_offset_and_order all_comments = Comment.joins(:post).where("posts.id" => posts(:welcome).id).order("posts.id", "comments.id") count = all_comments.count comments = all_comments.offset(1) assert_equal count - 1, comments.update_all(post_id: posts(:thinking).id) assert_equal posts(:thinking), comments(:more_greetings).post assert_equal posts(:welcome), comments(:greetings).post end def test_update_on_relation topic1 = TopicWithCallbacks.create! title: "arel", author_name: nil topic2 = TopicWithCallbacks.create! title: "activerecord", author_name: nil topics = TopicWithCallbacks.where(id: [topic1.id, topic2.id]) topics.update(title: "adequaterecord") assert_equal "adequaterecord", topic1.reload.title assert_equal "adequaterecord", topic2.reload.title # Testing that the before_update callbacks have run assert_equal "David", topic1.reload.author_name assert_equal "David", topic2.reload.author_name end def test_update_on_relation_passing_active_record_object_is_deprecated topic = Topic.create!(title: "Foo", author_name: nil) assert_deprecated(/update/) do Topic.where(id: topic.id).update(topic, title: "Bar") end end def test_distinct tag1 = Tag.create(name: "Foo") tag2 = Tag.create(name: "Foo") query = Tag.select(:name).where(id: [tag1.id, tag2.id]) assert_equal ["Foo", "Foo"], query.map(&:name) assert_sql(/DISTINCT/) do assert_equal ["Foo"], query.distinct.map(&:name) assert_deprecated { assert_equal ["Foo"], query.uniq.map(&:name) } end assert_sql(/DISTINCT/) do assert_equal ["Foo"], query.distinct(true).map(&:name) assert_deprecated { assert_equal ["Foo"], query.uniq(true).map(&:name) } end assert_equal ["Foo", "Foo"], query.distinct(true).distinct(false).map(&:name) assert_deprecated do assert_equal ["Foo", "Foo"], query.uniq(true).uniq(false).map(&:name) end end def test_doesnt_add_having_values_if_options_are_blank scope = Post.having("") assert scope.having_clause.empty? scope = Post.having([]) assert scope.having_clause.empty? end def test_having_with_binds_for_both_where_and_having post = Post.first having_then_where = Post.having(id: post.id).where(title: post.title).group(:id) where_then_having = Post.where(title: post.title).having(id: post.id).group(:id) assert_equal [post], having_then_where assert_equal [post], where_then_having end def test_multiple_where_and_having_clauses post = Post.first having_then_where = Post.having(id: post.id).where(title: post.title) .having(id: post.id).where(title: post.title).group(:id) assert_equal [post], having_then_where end def test_grouping_by_column_with_reserved_name assert_equal [], Possession.select(:where).group(:where).to_a end def test_references_triggers_eager_loading scope = Post.includes(:comments) assert !scope.eager_loading? assert scope.references(:comments).eager_loading? end def test_references_doesnt_trigger_eager_loading_if_reference_not_included scope = Post.references(:comments) assert !scope.eager_loading? end def test_automatically_added_where_references scope = Post.where(comments: { body: "Bla" }) assert_equal ["comments"], scope.references_values scope = Post.where("comments.body" => "Bla") assert_equal ["comments"], scope.references_values end def test_automatically_added_where_not_references scope = Post.where.not(comments: { body: "Bla" }) assert_equal ["comments"], scope.references_values scope = Post.where.not("comments.body" => "Bla") assert_equal ["comments"], scope.references_values end def test_automatically_added_having_references scope = Post.having(comments: { body: "Bla" }) assert_equal ["comments"], scope.references_values scope = Post.having("comments.body" => "Bla") assert_equal ["comments"], scope.references_values end def test_automatically_added_order_references scope = Post.order("comments.body") assert_equal ["comments"], scope.references_values scope = Post.order("comments.body", "yaks.body") assert_equal ["comments", "yaks"], scope.references_values # Don't infer yaks, let's not go down that road again... scope = Post.order("comments.body, yaks.body") assert_equal ["comments"], scope.references_values scope = Post.order("comments.body asc") assert_equal ["comments"], scope.references_values scope = Post.order("foo(comments.body)") assert_equal [], scope.references_values end def test_automatically_added_reorder_references scope = Post.reorder("comments.body") assert_equal %w(comments), scope.references_values scope = Post.reorder("comments.body", "yaks.body") assert_equal %w(comments yaks), scope.references_values # Don't infer yaks, let's not go down that road again... scope = Post.reorder("comments.body, yaks.body") assert_equal %w(comments), scope.references_values scope = Post.reorder("comments.body asc") assert_equal %w(comments), scope.references_values scope = Post.reorder("foo(comments.body)") assert_equal [], scope.references_values end def test_order_with_reorder_nil_removes_the_order relation = Post.order(:title).reorder(nil) assert_nil relation.order_values.first end def test_reverse_order_with_reorder_nil_removes_the_order relation = Post.order(:title).reverse_order.reorder(nil) assert_nil relation.order_values.first end def test_presence topics = Topic.all # the first query is triggered because there are no topics yet. assert_queries(1) { assert topics.present? } # checking if there are topics is used before you actually display them, # thus it shouldn't invoke an extra count query. assert_no_queries { assert topics.present? } assert_no_queries { assert !topics.blank? } # shows count of topics and loops after loading the query should not trigger extra queries either. assert_no_queries { topics.size } assert_no_queries { topics.length } assert_no_queries { topics.each } # count always trigger the COUNT query. assert_queries(1) { topics.count } assert topics.loaded? end test "find_by with hash conditions returns the first matching record" do assert_equal posts(:eager_other), Post.order(:id).find_by(author_id: 2) end test "find_by with non-hash conditions returns the first matching record" do assert_equal posts(:eager_other), Post.order(:id).find_by("author_id = 2") end test "find_by with multi-arg conditions returns the first matching record" do assert_equal posts(:eager_other), Post.order(:id).find_by("author_id = ?", 2) end test "find_by returns nil if the record is missing" do assert_equal nil, Post.all.find_by("1 = 0") end test "find_by doesn't have implicit ordering" do assert_sql(/^((?!ORDER).)*$/) { Post.all.find_by(author_id: 2) } end test "find_by requires at least one argument" do assert_raises(ArgumentError) { Post.all.find_by } end test "find_by! with hash conditions returns the first matching record" do assert_equal posts(:eager_other), Post.order(:id).find_by!(author_id: 2) end test "find_by! with non-hash conditions returns the first matching record" do assert_equal posts(:eager_other), Post.order(:id).find_by!("author_id = 2") end test "find_by! with multi-arg conditions returns the first matching record" do assert_equal posts(:eager_other), Post.order(:id).find_by!("author_id = ?", 2) end test "find_by! doesn't have implicit ordering" do assert_sql(/^((?!ORDER).)*$/) { Post.all.find_by!(author_id: 2) } end test "find_by! raises RecordNotFound if the record is missing" do assert_raises(ActiveRecord::RecordNotFound) do Post.all.find_by!("1 = 0") end end test "find_by! requires at least one argument" do assert_raises(ArgumentError) { Post.all.find_by! } end test "loaded relations cannot be mutated by multi value methods" do relation = Post.all relation.to_a assert_raises(ActiveRecord::ImmutableRelation) do relation.where! "foo" end end test "loaded relations cannot be mutated by single value methods" do relation = Post.all relation.to_a assert_raises(ActiveRecord::ImmutableRelation) do relation.limit! 5 end end test "loaded relations cannot be mutated by merge!" do relation = Post.all relation.to_a assert_raises(ActiveRecord::ImmutableRelation) do relation.merge! where: "foo" end end test "loaded relations cannot be mutated by extending!" do relation = Post.all relation.to_a assert_raises(ActiveRecord::ImmutableRelation) do relation.extending! Module.new end end test "relations with cached arel can't be mutated [internal API]" do relation = Post.all relation.count assert_raises(ActiveRecord::ImmutableRelation) { relation.limit!(5) } assert_raises(ActiveRecord::ImmutableRelation) { relation.where!("1 = 2") } end test "relations show the records in #inspect" do relation = Post.limit(2) assert_equal "#", relation.inspect end test "relations limit the records in #inspect at 10" do relation = Post.limit(11) assert_equal "#", relation.inspect end test "already-loaded relations don't perform a new query in #inspect" do relation = Post.limit(2) relation.to_a expected = "#" assert_no_queries do assert_equal expected, relation.inspect end end test "using a custom table affects the wheres" do table_alias = Post.arel_table.alias("omg_posts") table_metadata = ActiveRecord::TableMetadata.new(Post, table_alias) predicate_builder = ActiveRecord::PredicateBuilder.new(table_metadata) relation = ActiveRecord::Relation.new(Post, table_alias, predicate_builder) relation.where!(foo: "bar") node = relation.arel.constraints.first.grep(Arel::Attributes::Attribute).first assert_equal table_alias, node.relation end test "#load" do relation = Post.all assert_queries(1) do assert_equal relation, relation.load end assert_no_queries { relation.to_a } end test "group with select and includes" do authors_count = Post.select("author_id, COUNT(author_id) AS num_posts"). group("author_id").order("author_id").includes(:author).to_a assert_no_queries do result = authors_count.map do |post| [post.num_posts, post.author.try(:name)] end expected = [[1, nil], [5, "David"], [3, "Mary"], [2, "Bob"]] assert_equal expected, result end end test "joins with select" do posts = Post.joins(:author).select("id", "authors.author_address_id").order("posts.id").limit(3) assert_equal [1, 2, 4], posts.map(&:id) assert_equal [1, 1, 1], posts.map(&:author_address_id) end test "delegations do not leak to other classes" do Topic.all.by_lifo assert Topic.all.class.method_defined?(:by_lifo) assert !Post.all.respond_to?(:by_lifo) end def test_unscope_removes_binds left = Post.where(id: Arel::Nodes::BindParam.new) column = Post.columns_hash["id"] left.bind_values += [[column, 20]] relation = left.unscope(where: :id) assert_equal [], relation.bind_values end def test_merging_removes_rhs_bind_parameters left = Post.where(id: 20) right = Post.where(id: [1,2,3,4]) merged = left.merge(right) assert_equal [], merged.bind_values end def test_merging_keeps_lhs_bind_parameters binds = [ActiveRecord::Relation::QueryAttribute.new("id", 20, Post.type_for_attribute("id"))] right = Post.where(id: 20) left = Post.where(id: 10) merged = left.merge(right) assert_equal binds, merged.bound_attributes end def test_merging_reorders_bind_params post = Post.first right = Post.where(id: post.id) left = Post.where(title: post.title) merged = left.merge(right) assert_equal post, merged.first end def test_relation_join_method assert_equal "Thank you for the welcome,Thank you again for the welcome", Post.first.comments.join(",") end def test_connection_adapters_can_reorder_binds posts = Post.limit(1).offset(2) stubbed_connection = Post.connection.dup def stubbed_connection.combine_bind_parameters(**kwargs) offset = kwargs[:offset] kwargs[:offset] = kwargs[:limit] kwargs[:limit] = offset super(**kwargs) end posts.define_singleton_method(:connection) do stubbed_connection end assert_equal 2, posts.to_a.length end end