Add order to tests that rely on db ordering, to fix failing tests on pg

Also skip persistente tests related to UPDATE + ORDER BY for postgresql

PostgreSQL does not support updates with order by, and these tests are
failing randomly depending on the fixture loading order now.

Conflicts:

	activerecord/test/cases/associations/join_model_test.rb
	activerecord/test/cases/associations/nested_through_associations_test.rb
	activerecord/test/cases/clone_test.rb
	activerecord/test/cases/dup_test.rb
	activerecord/test/cases/relations_test.rb
	activerecord/test/cases/yaml_serialization_test.rb

activerecord/test/cases/associations/has_many_associations_test.rb

@@ -656,7 +656,7 @@ def test_clearing_an_association_collection
   end
 
   def test_clearing_updates_counter_cache
-    topic = Topic.first
+    topic = Topic.order(:id).first
 
     topic.replies.clear
     topic.reload
@@ -736,14 +736,14 @@ def test_dependent_association_respects_optional_hash_conditions_on_delete
   end
 
   def test_delete_all_association_with_primary_key_deletes_correct_records
-    firm = Firm.find(:first)
+    firm = Firm.order(:id).first
     # break the vanilla firm_id foreign key
     assert_equal 2, firm.clients.count
     firm.clients.first.update_attribute(:firm_id, nil)
     assert_equal 1, firm.clients(true).count
     assert_equal 1, firm.clients_using_primary_key_with_delete_all.count
     old_record = firm.clients_using_primary_key_with_delete_all.first
-    firm = Firm.find(:first)
+    firm = Firm.order(:id).first
     firm.destroy
     assert_nil Client.find_by_id(old_record.id)
   end
@@ -909,13 +909,12 @@ def test_depends_and_nullify
 
     core = companies(:rails_core)
     assert_equal accounts(:rails_core_account), core.account
-    assert_equal companies(:leetsoft, :jadedpixel), core.companies
+    assert_equal companies(:leetsoft, :jadedpixel), core.companies.order(:id)
     core.destroy
     assert_nil accounts(:rails_core_account).reload.firm_id
     assert_nil companies(:leetsoft).reload.client_of
     assert_nil companies(:jadedpixel).reload.client_of
 
-
     assert_equal num_accounts, Account.count
   end
 

activerecord/test/cases/associations/join_model_test.rb

@@ -384,7 +384,7 @@ def test_has_many_through_has_many_find_by_id
   end
 
   def test_has_many_through_polymorphic_has_one
-    assert_equal Tagging.find(1,2).sort_by { |t| t.id }, authors(:david).taggings
+    assert_equal Tagging.find(1,2).sort_by { |t| t.id }, authors(:david).taggings.order(:id)
   end
 
   def test_has_many_through_polymorphic_has_many
@@ -441,7 +441,7 @@ def test_add_to_self_referential_has_many_through
   end
 
   def test_has_many_through_uses_conditions_specified_on_the_has_many_association
-    author = Author.find(:first)
+    author = Author.order(:id).first
     assert_present author.comments
     assert_blank author.nonexistant_comments
   end
@@ -634,7 +634,7 @@ def test_preload_polymorphic_has_many_through
   end
 
   def test_preload_polymorph_many_types
-    taggings = Tagging.find :all, :include => :taggable, :conditions => ['taggable_type != ?', 'FakeModel']
+    taggings = Tagging.find :all, :include => :taggable, :conditions => ['taggable_type != ?', 'FakeModel'], :order => 'id'
     assert_no_queries do
       taggings.first.taggable.id
       taggings[1].taggable.id

activerecord/test/cases/finder_test.rb

@@ -103,8 +103,8 @@ def test_exists_returns_true_with_one_record_and_no_args
   def test_exists_with_nil_arg
     assert !Topic.exists?(nil)
     assert Topic.exists?
-    assert !Topic.first.replies.exists?(nil)
-    assert Topic.first.replies.exists?
+    assert !Topic.order(:id).first.replies.exists?(nil)
+    assert Topic.order(:id).first.replies.exists?
   end
 
   def test_does_not_exist_with_empty_table_and_no_args_given

activerecord/test/cases/json_serialization_test.rb

@@ -198,7 +198,7 @@ def test_should_allow_includes_for_list_of_authors
     ['"name":"David"', '"posts":[', '{"id":1}', '{"id":2}', '{"id":4}',
      '{"id":5}', '{"id":6}', '"name":"Mary"', '"posts":[{"id":7}]'].each do |fragment|
       assert json.include?(fragment), json
-     end
+    end
   end
 
   def test_should_allow_options_for_hash_of_authors
@@ -210,7 +210,7 @@ def test_should_allow_options_for_hash_of_authors
   end
 
   def test_should_be_able_to_encode_relation
-    authors_relation = Author.where(:id => [@david.id, @mary.id])
+    authors_relation = Author.where(:id => [@david.id, @mary.id]).order(:id)
 
     json = ActiveSupport::JSON.encode authors_relation, :only => :name
     assert_equal '[{"author":{"name":"David"}},{"author":{"name":"Mary"}}]', json

activerecord/test/cases/nested_attributes_test.rb

@@ -850,7 +850,7 @@ def setup
 
   def test_should_update_existing_records_with_non_standard_primary_key
     @owner.update_attributes(@params)
-    assert_equal ['Foo', 'Bar'], @owner.pets.map(&:name)
+    assert_equal %w(Bar Foo), @owner.pets.map(&:name).sort
   end
 
   def test_attr_accessor_of_child_should_be_value_provided_during_update_attributes

activerecord/test/cases/persistence_test.rb

@@ -17,15 +17,16 @@
 require 'active_support/core_ext/exception'
 
 class PersistencesTest < ActiveRecord::TestCase
+  fixtures :topics, :companies, :developers, :projects, :computers, :accounts, :minimalistics,
+    'warehouse-things', :authors, :categorizations, :categories, :posts, :minivans
 
-  fixtures :topics, :companies, :developers, :projects, :computers, :accounts, :minimalistics, 'warehouse-things', :authors, :categorizations, :categories, :posts, :minivans
-
-  # Oracle UPDATE does not support ORDER BY
-  unless current_adapter?(:OracleAdapter)
+  # Skip databases that don't support UPDATE + ORDER BY
+  unless current_adapter?(:OracleAdapter, :PostgreSQLAdapter)
     def test_update_all_ignores_order_without_limit_from_association
       author = authors(:david)
       assert_nothing_raised do
-        assert_equal author.posts_with_comments_and_categories.length, author.posts_with_comments_and_categories.update_all([ "body = ?", "bulk update!" ])
+        assert_equal author.posts_with_comments_and_categories.length,
+          author.posts_with_comments_and_categories.update_all([ "body = ?", "bulk update!" ])
       end
     end
 

activerecord/test/cases/relations_test.rb

@@ -570,7 +570,7 @@ def test_relation_merging_with_locks
 
   def test_relation_merging_with_preload
     [Post.scoped.merge(Post.preload(:author)), Post.preload(:author).merge(Post.scoped)].each do |posts|
-      assert_queries(2) { assert posts.first.author }
+      assert_queries(2) { assert posts.order(:id).first.author }
     end
   end
 

activerecord/test/cases/timestamp_test.rb

@@ -10,7 +10,7 @@ class TimestampTest < ActiveRecord::TestCase
   fixtures :developers, :owners, :pets, :toys, :cars, :tasks
 
   def setup
-    @developer = Developer.first
+    @developer = Developer.order(:id).first
     @developer.update_attribute(:updated_at, Time.now.prev_month)
     @previously_updated_at = @developer.updated_at
   end

activerecord/test/cases/yaml_serialization_test.rb

@@ -12,7 +12,7 @@ def test_to_yaml_with_time_with_zone_should_not_raise_exception
   end
 
   def test_roundtrip
-    topic = Topic.first
+    topic = Topic.order(:id).first
     assert topic
     t = YAML.load YAML.dump topic
     assert_equal topic, t

activerecord/test/models/company.rb

@@ -92,7 +92,7 @@ class Firm < Company
 end
 
 class DependentFirm < Company
-  has_one :account, :foreign_key => "firm_id", :dependent => :nullify
+  has_one :account, :foreign_key => "firm_id", :dependent => :nullify, :order => "accounts.id"
   has_many :companies, :foreign_key => 'client_of', :dependent => :nullify
 end