require "cases/helper" require 'models/man' require 'models/face' require 'models/interest' require 'models/zine' require 'models/club' require 'models/sponsor' class InverseAssociationTests < ActiveRecord::TestCase def test_should_allow_for_inverse_of_options_in_associations assert_nothing_raised(ArgumentError, 'ActiveRecord should allow the inverse_of options on has_many') do Class.new(ActiveRecord::Base).has_many(:wheels, :inverse_of => :car) end assert_nothing_raised(ArgumentError, 'ActiveRecord should allow the inverse_of options on has_one') do Class.new(ActiveRecord::Base).has_one(:engine, :inverse_of => :car) end assert_nothing_raised(ArgumentError, 'ActiveRecord should allow the inverse_of options on belongs_to') do Class.new(ActiveRecord::Base).belongs_to(:car, :inverse_of => :driver) end end def test_should_be_able_to_ask_a_reflection_if_it_has_an_inverse has_one_with_inverse_ref = Man.reflect_on_association(:face) assert_respond_to has_one_with_inverse_ref, :has_inverse? assert has_one_with_inverse_ref.has_inverse? has_many_with_inverse_ref = Man.reflect_on_association(:interests) assert_respond_to has_many_with_inverse_ref, :has_inverse? assert has_many_with_inverse_ref.has_inverse? belongs_to_with_inverse_ref = Face.reflect_on_association(:man) assert_respond_to belongs_to_with_inverse_ref, :has_inverse? assert belongs_to_with_inverse_ref.has_inverse? has_one_without_inverse_ref = Club.reflect_on_association(:sponsor) assert_respond_to has_one_without_inverse_ref, :has_inverse? assert !has_one_without_inverse_ref.has_inverse? has_many_without_inverse_ref = Club.reflect_on_association(:memberships) assert_respond_to has_many_without_inverse_ref, :has_inverse? assert !has_many_without_inverse_ref.has_inverse? belongs_to_without_inverse_ref = Sponsor.reflect_on_association(:sponsor_club) assert_respond_to belongs_to_without_inverse_ref, :has_inverse? assert !belongs_to_without_inverse_ref.has_inverse? end def test_should_be_able_to_ask_a_reflection_what_it_is_the_inverse_of has_one_ref = Man.reflect_on_association(:face) assert_respond_to has_one_ref, :inverse_of has_many_ref = Man.reflect_on_association(:interests) assert_respond_to has_many_ref, :inverse_of belongs_to_ref = Face.reflect_on_association(:man) assert_respond_to belongs_to_ref, :inverse_of end def test_inverse_of_method_should_supply_the_actual_reflection_instance_it_is_the_inverse_of has_one_ref = Man.reflect_on_association(:face) assert_equal Face.reflect_on_association(:man), has_one_ref.inverse_of has_many_ref = Man.reflect_on_association(:interests) assert_equal Interest.reflect_on_association(:man), has_many_ref.inverse_of belongs_to_ref = Face.reflect_on_association(:man) assert_equal Man.reflect_on_association(:face), belongs_to_ref.inverse_of end def test_associations_with_no_inverse_of_should_return_nil has_one_ref = Club.reflect_on_association(:sponsor) assert_nil has_one_ref.inverse_of has_many_ref = Club.reflect_on_association(:memberships) assert_nil has_many_ref.inverse_of belongs_to_ref = Sponsor.reflect_on_association(:sponsor_club) assert_nil belongs_to_ref.inverse_of end end class InverseHasOneTests < ActiveRecord::TestCase fixtures :men, :faces def test_parent_instance_should_be_shared_with_child_on_find m = men(:gordon) f = m.face assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance" f.man.name = 'Mungo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to child-owned instance" end def test_parent_instance_should_be_shared_with_eager_loaded_child_on_find m = Man.all.merge!(:where => {:name => 'Gordon'}, :includes => :face).first f = m.face assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance" f.man.name = 'Mungo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to child-owned instance" m = Man.all.merge!(:where => {:name => 'Gordon'}, :includes => :face, :order => 'faces.id').first f = m.face assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance" f.man.name = 'Mungo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to child-owned instance" end def test_parent_instance_should_be_shared_with_newly_built_child m = Man.first f = m.build_face(:description => 'haunted') assert_not_nil f.man assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance" f.man.name = 'Mungo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to just-built-child-owned instance" end def test_parent_instance_should_be_shared_with_newly_created_child m = Man.first f = m.create_face(:description => 'haunted') assert_not_nil f.man assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance" f.man.name = 'Mungo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to newly-created-child-owned instance" end def test_parent_instance_should_be_shared_with_newly_created_child_via_bang_method m = Man.first f = m.create_face!(:description => 'haunted') assert_not_nil f.man assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance" f.man.name = 'Mungo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to newly-created-child-owned instance" end def test_parent_instance_should_be_shared_with_replaced_via_accessor_child m = Man.first f = Face.new(:description => 'haunted') m.face = f assert_not_nil f.man assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance" f.man.name = 'Mungo' assert_equal m.name, f.man.name, "Name of man should be the same after changes to replaced-child-owned instance" end def test_trying_to_use_inverses_that_dont_exist_should_raise_an_error assert_raise(ActiveRecord::InverseOfAssociationNotFoundError) { Man.first.dirty_face } end end class InverseHasManyTests < ActiveRecord::TestCase fixtures :men, :interests def test_parent_instance_should_be_shared_with_every_child_on_find m = men(:gordon) is = m.interests is.each do |i| assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance" i.man.name = 'Mungo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to child-owned instance" end end def test_parent_instance_should_be_shared_with_eager_loaded_children m = Man.all.merge!(:where => {:name => 'Gordon'}, :includes => :interests).first is = m.interests is.each do |i| assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance" i.man.name = 'Mungo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to child-owned instance" end m = Man.all.merge!(:where => {:name => 'Gordon'}, :includes => :interests, :order => 'interests.id').first is = m.interests is.each do |i| assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance" i.man.name = 'Mungo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to child-owned instance" end end def test_parent_instance_should_be_shared_with_newly_block_style_built_child m = Man.first i = m.interests.build {|ii| ii.topic = 'Industrial Revolution Re-enactment'} assert_not_nil i.topic, "Child attributes supplied to build via blocks should be populated" assert_not_nil i.man assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance" i.man.name = 'Mungo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to just-built-child-owned instance" end def test_parent_instance_should_be_shared_with_newly_created_via_bang_method_child m = Man.first i = m.interests.create!(:topic => 'Industrial Revolution Re-enactment') assert_not_nil i.man assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance" i.man.name = 'Mungo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to newly-created-child-owned instance" end def test_parent_instance_should_be_shared_with_newly_block_style_created_child m = Man.first i = m.interests.create {|ii| ii.topic = 'Industrial Revolution Re-enactment'} assert_not_nil i.topic, "Child attributes supplied to create via blocks should be populated" assert_not_nil i.man assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance" i.man.name = 'Mungo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to newly-created-child-owned instance" end def test_parent_instance_should_be_shared_with_poked_in_child m = men(:gordon) i = Interest.create(:topic => 'Industrial Revolution Re-enactment') m.interests << i assert_not_nil i.man assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance" i.man.name = 'Mungo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to newly-created-child-owned instance" end def test_parent_instance_should_be_shared_with_replaced_via_accessor_children m = Man.first i = Interest.new(:topic => 'Industrial Revolution Re-enactment') m.interests = [i] assert_not_nil i.man assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance" m.name = 'Bongo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance" i.man.name = 'Mungo' assert_equal m.name, i.man.name, "Name of man should be the same after changes to replaced-child-owned instance" end def test_parent_instance_should_be_shared_with_first_and_last_child man = Man.first assert man.interests.first.man.equal? man assert man.interests.last.man.equal? man end def test_trying_to_use_inverses_that_dont_exist_should_raise_an_error assert_raise(ActiveRecord::InverseOfAssociationNotFoundError) { Man.first.secret_interests } end end class InverseBelongsToTests < ActiveRecord::TestCase fixtures :men, :faces, :interests def test_child_instance_should_be_shared_with_parent_on_find f = faces(:trusting) m = f.man assert_equal f.description, m.face.description, "Description of face should be the same before changes to child instance" f.description = 'gormless' assert_equal f.description, m.face.description, "Description of face should be the same after changes to child instance" m.face.description = 'pleasing' assert_equal f.description, m.face.description, "Description of face should be the same after changes to parent-owned instance" end def test_eager_loaded_child_instance_should_be_shared_with_parent_on_find f = Face.all.merge!(:includes => :man, :where => {:description => 'trusting'}).first m = f.man assert_equal f.description, m.face.description, "Description of face should be the same before changes to child instance" f.description = 'gormless' assert_equal f.description, m.face.description, "Description of face should be the same after changes to child instance" m.face.description = 'pleasing' assert_equal f.description, m.face.description, "Description of face should be the same after changes to parent-owned instance" f = Face.all.merge!(:includes => :man, :order => 'men.id', :where => {:description => 'trusting'}).first m = f.man assert_equal f.description, m.face.description, "Description of face should be the same before changes to child instance" f.description = 'gormless' assert_equal f.description, m.face.description, "Description of face should be the same after changes to child instance" m.face.description = 'pleasing' assert_equal f.description, m.face.description, "Description of face should be the same after changes to parent-owned instance" end def test_child_instance_should_be_shared_with_newly_built_parent f = faces(:trusting) m = f.build_man(:name => 'Charles') assert_not_nil m.face assert_equal f.description, m.face.description, "Description of face should be the same before changes to child instance" f.description = 'gormless' assert_equal f.description, m.face.description, "Description of face should be the same after changes to child instance" m.face.description = 'pleasing' assert_equal f.description, m.face.description, "Description of face should be the same after changes to just-built-parent-owned instance" end def test_child_instance_should_be_shared_with_newly_created_parent f = faces(:trusting) m = f.create_man(:name => 'Charles') assert_not_nil m.face assert_equal f.description, m.face.description, "Description of face should be the same before changes to child instance" f.description = 'gormless' assert_equal f.description, m.face.description, "Description of face should be the same after changes to child instance" m.face.description = 'pleasing' assert_equal f.description, m.face.description, "Description of face should be the same after changes to newly-created-parent-owned instance" end def test_should_not_try_to_set_inverse_instances_when_the_inverse_is_a_has_many i = interests(:trainspotting) m = i.man assert_not_nil m.interests iz = m.interests.detect { |_iz| _iz.id == i.id} assert_not_nil iz assert_equal i.topic, iz.topic, "Interest topics should be the same before changes to child" i.topic = 'Eating cheese with a spoon' assert_not_equal i.topic, iz.topic, "Interest topics should not be the same after changes to child" iz.topic = 'Cow tipping' assert_not_equal i.topic, iz.topic, "Interest topics should not be the same after changes to parent-owned instance" end def test_child_instance_should_be_shared_with_replaced_via_accessor_parent f = Face.first m = Man.new(:name => 'Charles') f.man = m assert_not_nil m.face assert_equal f.description, m.face.description, "Description of face should be the same before changes to child instance" f.description = 'gormless' assert_equal f.description, m.face.description, "Description of face should be the same after changes to child instance" m.face.description = 'pleasing' assert_equal f.description, m.face.description, "Description of face should be the same after changes to replaced-parent-owned instance" end def test_trying_to_use_inverses_that_dont_exist_should_raise_an_error assert_raise(ActiveRecord::InverseOfAssociationNotFoundError) { Face.first.horrible_man } end end class InversePolymorphicBelongsToTests < ActiveRecord::TestCase fixtures :men, :faces, :interests def test_child_instance_should_be_shared_with_parent_on_find f = Face.all.merge!(:where => {:description => 'confused'}).first m = f.polymorphic_man assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same before changes to child instance" f.description = 'gormless' assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same after changes to child instance" m.polymorphic_face.description = 'pleasing' assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same after changes to parent-owned instance" end def test_eager_loaded_child_instance_should_be_shared_with_parent_on_find f = Face.all.merge!(:where => {:description => 'confused'}, :includes => :man).first m = f.polymorphic_man assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same before changes to child instance" f.description = 'gormless' assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same after changes to child instance" m.polymorphic_face.description = 'pleasing' assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same after changes to parent-owned instance" f = Face.all.merge!(:where => {:description => 'confused'}, :includes => :man, :order => 'men.id').first m = f.polymorphic_man assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same before changes to child instance" f.description = 'gormless' assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same after changes to child instance" m.polymorphic_face.description = 'pleasing' assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same after changes to parent-owned instance" end def test_child_instance_should_be_shared_with_replaced_via_accessor_parent face = faces(:confused) new_man = Man.new assert_not_nil face.polymorphic_man face.polymorphic_man = new_man assert_equal face.description, new_man.polymorphic_face.description, "Description of face should be the same before changes to parent instance" face.description = 'Bongo' assert_equal face.description, new_man.polymorphic_face.description, "Description of face should be the same after changes to parent instance" new_man.polymorphic_face.description = 'Mungo' assert_equal face.description, new_man.polymorphic_face.description, "Description of face should be the same after changes to replaced-parent-owned instance" end def test_child_instance_should_be_shared_with_replaced_via_method_parent face = faces(:confused) new_man = Man.new assert_not_nil face.polymorphic_man face.polymorphic_man = new_man assert_equal face.description, new_man.polymorphic_face.description, "Description of face should be the same before changes to parent instance" face.description = 'Bongo' assert_equal face.description, new_man.polymorphic_face.description, "Description of face should be the same after changes to parent instance" new_man.polymorphic_face.description = 'Mungo' assert_equal face.description, new_man.polymorphic_face.description, "Description of face should be the same after changes to replaced-parent-owned instance" end def test_should_not_try_to_set_inverse_instances_when_the_inverse_is_a_has_many i = interests(:llama_wrangling) m = i.polymorphic_man assert_not_nil m.polymorphic_interests iz = m.polymorphic_interests.detect { |_iz| _iz.id == i.id} assert_not_nil iz assert_equal i.topic, iz.topic, "Interest topics should be the same before changes to child" i.topic = 'Eating cheese with a spoon' assert_not_equal i.topic, iz.topic, "Interest topics should not be the same after changes to child" iz.topic = 'Cow tipping' assert_not_equal i.topic, iz.topic, "Interest topics should not be the same after changes to parent-owned instance" end def test_trying_to_access_inverses_that_dont_exist_shouldnt_raise_an_error # Ideally this would, if only for symmetry's sake with other association types assert_nothing_raised(ActiveRecord::InverseOfAssociationNotFoundError) { Face.first.horrible_polymorphic_man } end def test_trying_to_set_polymorphic_inverses_that_dont_exist_at_all_should_raise_an_error # fails because no class has the correct inverse_of for horrible_polymorphic_man assert_raise(ActiveRecord::InverseOfAssociationNotFoundError) { Face.first.horrible_polymorphic_man = Man.first } end def test_trying_to_set_polymorphic_inverses_that_dont_exist_on_the_instance_being_set_should_raise_an_error # passes because Man does have the correct inverse_of assert_nothing_raised(ActiveRecord::InverseOfAssociationNotFoundError) { Face.first.polymorphic_man = Man.first } # fails because Interest does have the correct inverse_of assert_raise(ActiveRecord::InverseOfAssociationNotFoundError) { Face.first.polymorphic_man = Interest.first } end end # NOTE - these tests might not be meaningful, ripped as they were from the parental_control plugin # which would guess the inverse rather than look for an explicit configuration option. class InverseMultipleHasManyInversesForSameModel < ActiveRecord::TestCase fixtures :men, :interests, :zines def test_that_we_can_load_associations_that_have_the_same_reciprocal_name_from_different_models assert_nothing_raised(ActiveRecord::AssociationTypeMismatch) do i = Interest.first i.zine i.man end end def test_that_we_can_create_associations_that_have_the_same_reciprocal_name_from_different_models assert_nothing_raised(ActiveRecord::AssociationTypeMismatch) do i = Interest.first i.build_zine(:title => 'Get Some in Winter! 2008') i.build_man(:name => 'Gordon') i.save! end end end