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@@ -665,7 +665,7 @@ module ActiveRecord
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             condition_params = [value]
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           else
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             condition_sql = "LOWER(#{sql_attribute}) #{comparison_operator}"
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-            condition_params = [value.chars.downcase]
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+            condition_params = [value.chars.downcase.to_s]
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           end
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           if scope = configuration[:scope]

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@@ -364,6 +364,13 @@ class ValidationsTest < ActiveRecord::TestCase
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     assert t2.save, "Should now save t2 as unique"
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   end
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+  def test_validates_uniquness_with_newline_chars
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+    Topic.validates_uniqueness_of(:title, :case_sensitive => false)
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+
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+    t = Topic.new("title" => "new\nline")
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+    assert t.save, "Should save t as unique"
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+  end
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+
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   def test_validate_uniqueness_with_scope
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     Reply.validates_uniqueness_of(:content, :scope => "parent_id")
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