Fixed that loading including associations returns all results if Load IDs For Limited Eager Loading returns none (closes #4528) [Rick]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4179 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Fixed that loading including associations returns all results if Load IDs For Limited Eager Loading returns none (closes #4528) [Rick]
+
 * Fixed HasManyAssociation#find bugs when :finder_sql is set #4600 [lagroue@free.fr]
 
 * Allow AR::Base#respond_to? to behave when @attributes is nil [zenspider]

activerecord/lib/active_record/associations.rb

@@ -962,14 +962,20 @@ module ActiveRecord
         end
         
         def count_with_associations(options = {})
-          join_dependency = JoinDependency.new(self, merge_includes(scope(:find, :include), options[:include]), options[:joins])
-          return count_by_sql(construct_counter_sql_with_included_associations(options, join_dependency))
+          catch :invalid_query do
+            join_dependency = JoinDependency.new(self, merge_includes(scope(:find, :include), options[:include]), options[:joins])
+            return count_by_sql(construct_counter_sql_with_included_associations(options, join_dependency))
+          end
+          0
         end
 
         def find_with_associations(options = {})
-          join_dependency = JoinDependency.new(self, merge_includes(scope(:find, :include), options[:include]), options[:joins])
-          rows = select_all_rows(options, join_dependency)
-          return join_dependency.instantiate(rows)
+          catch :invalid_query do
+            join_dependency = JoinDependency.new(self, merge_includes(scope(:find, :include), options[:include]), options[:joins])
+            rows = select_all_rows(options, join_dependency)
+            return join_dependency.instantiate(rows)
+          end
+          []
         end
 
         def configure_dependency_for_has_many(reflection)
@@ -1151,6 +1157,8 @@ module ActiveRecord
         def add_limited_ids_condition!(sql, options, join_dependency)
           unless (id_list = select_limited_ids_list(options, join_dependency)).empty?
             sql << "#{condition_word(sql)} #{table_name}.#{primary_key} IN (#{id_list}) "
+          else
+            throw :invalid_query
           end
         end
  

activerecord/test/associations_go_eager_test.rb

@@ -138,6 +138,16 @@ class EagerAssociationTest < Test::Unit::TestCase
     assert_equal count, posts.size
   end
 
+  def test_eager_with_has_many_and_limit_ond_high_offset
+    posts = Post.find(:all, :include => [ :author, :comments ], :limit => 2, :offset => 10, :conditions => [ "authors.name = ?", 'David' ])
+    assert_equal 0, posts.size
+  end
+
+  def test_count_eager_with_has_many_and_limit_ond_high_offset
+    posts = Post.count(:all, :include => [ :author, :comments ], :limit => 2, :offset => 10, :conditions => [ "authors.name = ?", 'David' ])
+    assert_equal 0, posts
+  end
+
   def test_eager_with_has_many_and_limit_with_no_results
     posts = Post.find(:all, :include => [ :author, :comments ], :limit => 2, :conditions => "posts.title = 'magic forest'")
     assert_equal 0, posts.size