3 files changed, 7 insertions, 6 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index bc6fd4e722..55c7da5b4f 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -23,8 +23,8 @@ module ActiveRecord
       config = config.symbolize_keys
       host     = config[:host]
       port     = config[:port] || 5432
-      username = config[:username].to_s
-      password = config[:password].to_s
+      username = config[:username].to_s if config[:username]
+      password = config[:password].to_s if config[:password]
 
       if config.has_key?(:database)
         database = config[:database]
diff --git a/activerecord/test/cases/associations_test.rb b/activerecord/test/cases/associations_test.rb
index 4904feeb7d..0b2731ecd7 100644
--- a/activerecord/test/cases/associations_test.rb
+++ b/activerecord/test/cases/associations_test.rb
@@ -27,7 +27,7 @@ require 'models/sponsor'
 
 class AssociationsTest < ActiveRecord::TestCase
   fixtures :accounts, :companies, :developers, :projects, :developers_projects,
-           :computers
+           :computers, :people, :readers
 
   def test_include_with_order_works
     assert_nothing_raised {Account.find(:first, :order => 'id', :include => :firm)}
@@ -45,7 +45,7 @@ class AssociationsTest < ActiveRecord::TestCase
     assert_equal [], person.readers.find(:all)
     person.save!
     reader = Reader.create! :person => person, :post => Post.new(:title => "foo", :body => "bar")
-    assert_equal [reader], person.readers.find(:all)
+    assert person.readers.find(reader.id)
   end
 
   def test_force_reload
diff --git a/activerecord/test/cases/query_cache_test.rb b/activerecord/test/cases/query_cache_test.rb
index eae2104531..171d0e6dae 100644
--- a/activerecord/test/cases/query_cache_test.rb
+++ b/activerecord/test/cases/query_cache_test.rb
@@ -116,8 +116,9 @@ class QueryCacheExpiryTest < ActiveRecord::TestCase
   def test_cache_is_expired_by_habtm_delete
     ActiveRecord::Base.connection.expects(:clear_query_cache).times(2)
     ActiveRecord::Base.cache do
-      c = Category.find(:first)
-      p = Post.find(:first)
+      c = Category.find(1)
+      p = Post.find(1)
+      assert p.categories.any?
       p.categories.delete_all
     end
   end