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-rw-r--r--activerecord/lib/active_record/model.rb2
-rw-r--r--activerecord/test/cases/inclusion_test.rb5
2 files changed, 7 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/model.rb b/activerecord/lib/active_record/model.rb
index e1d3db1aec..4e8ed14fb7 100644
--- a/activerecord/lib/active_record/model.rb
+++ b/activerecord/lib/active_record/model.rb
@@ -6,6 +6,8 @@ module ActiveRecord
end
def self.included(base)
+ return if base < Tag
+
base.class_eval do
include Tag
diff --git a/activerecord/test/cases/inclusion_test.rb b/activerecord/test/cases/inclusion_test.rb
index 70f402024b..189e537bd6 100644
--- a/activerecord/test/cases/inclusion_test.rb
+++ b/activerecord/test/cases/inclusion_test.rb
@@ -65,6 +65,11 @@ class InclusionUnitTest < ActiveRecord::TestCase
ensure
ActiveRecord::Base.time_zone_aware_attributes = false
end
+
+ # Doesn't really test anything, but this is here to ensure warnings don't occur
+ def test_included_twice
+ @klass.send :include, ActiveRecord::Model
+ end
end
class InclusionFixturesTest < ActiveRecord::TestCase