Use select and change test so new tests can work on postgres.

Signed-off-by: Michael Koziarski <michael@koziarski.com>

activerecord/test/cases/finder_test.rb

@@ -170,9 +170,9 @@ def test_find_with_limit_and_condition
   end
 
   def test_find_with_group
-    developers =  Developer.find(:all, :group => "salary")
+    developers =  Developer.find(:all, :group => "salary", :select => "salary")
     assert_equal 4, developers.size
-    assert_equal 4, developers.uniq(&:salary).size
+    assert_equal 4, developers.map(&:salary).uniq.size
   end
 
   def test_find_with_entire_select_statement

activerecord/test/models/category.rb

@@ -14,7 +14,7 @@ class Category < ActiveRecord::Base
                           :class_name => 'Post',
                           :conditions => { :title => 'Yet Another Testing Title' }
 
-  has_and_belongs_to_many :posts_gruoped_by_title, :class_name => "Post", :group => "title"
+  has_and_belongs_to_many :posts_gruoped_by_title, :class_name => "Post", :group => "title", :select => "title"
 
   def self.what_are_you
     'a category...'

activerecord/test/models/company.rb

@@ -55,8 +55,8 @@ class Firm < Company
   has_many :readonly_clients, :class_name => 'Client', :readonly => true
   has_many :clients_using_primary_key, :class_name => 'Client',
            :primary_key => 'name', :foreign_key => 'firm_name'
-  has_many :clients_grouped_by_firm_id, :class_name => "Client", :group => "firm_id"
-  has_many :clients_grouped_by_name, :class_name => "Client", :group => "name"
+  has_many :clients_grouped_by_firm_id, :class_name => "Client", :group => "firm_id", :select => "firm_id"
+  has_many :clients_grouped_by_name, :class_name => "Client", :group => "name", :select => "name"
 
   has_one :account, :foreign_key => "firm_id", :dependent => :destroy, :validate => true
   has_one :unvalidated_account, :foreign_key => "firm_id", :class_name => 'Account', :validate => false