@@ -63,7 +63,7 @@ module ActiveRecord # Fetches the first one using SQL if possible. def first(*args) - if fetch_first_or_last_using_find? args + if fetch_first_or_last_using_find?(args) find(:first, *args) else load_target unless loaded? @@ -73,7 +73,7 @@ module ActiveRecord # Fetches the last one using SQL if possible. def last(*args) - if fetch_first_or_last_using_find? args + if fetch_first_or_last_using_find?(args) find(:last, *args) else load_target unless loaded? @@ -420,7 +420,8 @@ module ActiveRecord end def fetch_first_or_last_using_find?(args) - args.first.kind_of?(Hash) || !(loaded? || @owner.new_record? || @reflection.options[:finder_sql] || !@target.blank? || args.first.kind_of?(Integer)) + args.first.kind_of?(Hash) || !(loaded? || @owner.new_record? || @reflection.options[:finder_sql] || + @target.any? { |record| record.new_record? } || args.first.kind_of?(Integer)) end end end activerecord/lib/active_record/associations/association_collection.rb @@ -253,7 +253,7 @@ class HasAndBelongsToManyAssociationsTest < ActiveRecord::TestCase assert !devel.projects.loaded? assert_equal devel.projects.last, proj - assert devel.projects.loaded? + assert !devel.projects.loaded? assert !proj.new_record? assert_equal Developer.find(1).projects.sort_by(&:id).last, proj # prove join table is updated activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb @@ -1009,6 +1009,19 @@ class HasManyAssociationsTest < ActiveRecord::TestCase assert firm.clients.loaded? end + def test_calling_first_or_last_on_existing_record_with_create_should_not_load_association + firm = companies(:first_firm) + firm.clients.create(:name => 'Foo') + assert !firm.clients.loaded? + + assert_queries 2 do + firm.clients.first + firm.clients.last + end + + assert !firm.clients.loaded? + end + def test_calling_first_or_last_on_new_record_should_not_run_queries firm = Firm.new activerecord/test/cases/associations/has_many_associations_test.rb 46939a9b5a0098fddeac99a8a4331f66bdd0710e Jan De Poorter DefV jan@defv.be http://github.com/rails/rails/commit/050e58441bf7e60d167f6708072f8fa7aee2ce76 050e58441bf7e60d167f6708072f8fa7aee2ce76 2008-09-22T10:22:30-07:00 2008-09-22T10:14:42-07:00 Association#first and last should not load the association if not needed. [#1091 state:resolved] Signed-off-by: Pratik Naik <pratiknaik@gmail.com> ab71b73bc91801cc2daa22ba92fb2da5ea1eec99 Pratik Naik lifo pratiknaik@gmail.com