Fix eager loading error messages, allow :include to specify tables using...

Fix eager loading error messages, allow :include to specify tables using strings or symbols. Closes #2222

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2258 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

 *SVN*
 
+* Fix eager loading error messages, allow :include to specify tables using strings or symbols. Closes #2222 [Marcel Molina]
+
 * Added check for RAILS_CONNECTION_ADAPTERS on startup and only load the connection adapters specified within if its present (available in Rails through config.connection_adapters using the new config) #1958 [skae]
 
 * Fixed various problems with has_and_belongs_to_many when using customer finder_sql #2094 [Florian Weber]

activerecord/lib/active_record/associations.rb

@@ -782,14 +782,15 @@ def find_with_associations(options = {})
 
 
         def reflect_on_included_associations(associations)
-          [ associations ].flatten.collect { |association| reflect_on_association(association) }
+          [ associations ].flatten.collect { |association| reflect_on_association(association.to_s.intern) }
         end
 
         def guard_against_missing_reflections(reflections, options)
           reflections.each do |r| 
             raise(
               ConfigurationError, 
-              "Association was not found; perhaps you misspelled it?  You specified :include => :#{options[:include].join(', :')}"
+              "Association was not found; perhaps you misspelled it?  " +
+              "You specified :include => :#{[options[:include]].flatten.join(', :')}"
             ) if r.nil? 
           end
         end

activerecord/test/associations_go_eager_test.rb

@@ -136,12 +136,22 @@ def test_eager_with_has_one_dependent_does_not_destroy_dependent
   end
 
   def test_eager_with_invalid_association_reference
+    assert_raises(ActiveRecord::ConfigurationError, "Association was not found; perhaps you misspelled it?  You specified :include => :monkeys") {
+      post = Post.find(6, :include=> :monkeys )
+    }
     assert_raises(ActiveRecord::ConfigurationError, "Association was not found; perhaps you misspelled it?  You specified :include => :monkeys") {
       post = Post.find(6, :include=>[ :monkeys ])
     }
+    assert_raises(ActiveRecord::ConfigurationError, "Association was not found; perhaps you misspelled it?  You specified :include => :monkeys") {
+      post = Post.find(6, :include=>[ 'monkeys' ])
+    }
     assert_raises(ActiveRecord::ConfigurationError, "Association was not found; perhaps you misspelled it?  You specified :include => :monkeys, :elephants") {
       post = Post.find(6, :include=>[ :monkeys, :elephants ])
     }
   end
 
+  def test_eager_with_valid_association_as_string_not_symbol
+    assert_nothing_raised { Post.find(:all, :include => 'comments') }
+  end
+
 end