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Ensure that ActiveRecord::Calculations disambiguates field names with…

… the table name. Closes #11027 [cavalle]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@9018 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
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commit 7750afc4c1b6873bf1ee50ca386b9714430be618 1 parent dd665ff
@technoweenie technoweenie authored
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2  activerecord/CHANGELOG
@@ -1,5 +1,7 @@
*SVN*
+* Ensure that ActiveRecord::Calculations disambiguates field names with the table name. #11027 [cavalle]
+
* Added add/remove_timestamps to the schema statements for adding the created_at/updated_at columns on existing tables #11129 [jramirez]
* Added ActiveRecord::Base.find(:last) #11338 [miloops]
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1  activerecord/lib/active_record/calculations.rb
@@ -155,6 +155,7 @@ def construct_calculation_sql(operation, column_name, options) #:nodoc:
scope = scope(:find)
merged_includes = merge_includes(scope ? scope[:include] : [], options[:include])
aggregate_alias = column_alias_for(operation, column_name)
+ column_name = "#{connection.quote_table_name(table_name)}.#{column_name}" unless column_name == "*" || column_name.to_s.include?('.')
if operation == 'count'
if merged_includes.any?
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8 activerecord/test/cases/associations/join_model_test.rb
@@ -544,6 +544,14 @@ def test_has_many_through_sum_uses_calculations
assert_nothing_raised { authors(:david).comments.sum(:post_id) }
end
+ def test_calculations_on_has_many_through_should_disambiguate_fields
+ assert_nothing_raised { authors(:david).categories.maximum(:id) }
+ end
+
+ def test_calculations_on_has_many_through_should_not_disambiguate_fields_unless_necessary
+ assert_nothing_raised { authors(:david).categories.maximum("categories.id") }
+ end
+
def test_has_many_through_has_many_with_sti
assert_equal [comments(:does_it_hurt)], authors(:david).special_post_comments
end
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