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-rw-r--r--activerecord/lib/active_record/attribute_methods/read.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/attribute_methods/read.rb b/activerecord/lib/active_record/attribute_methods/read.rb
index 0b7d6d9094..3da3d9d8cc 100644
--- a/activerecord/lib/active_record/attribute_methods/read.rb
+++ b/activerecord/lib/active_record/attribute_methods/read.rb
@@ -12,7 +12,7 @@ module ActiveRecord
self.attribute_types_cached_by_default = ATTRIBUTE_TYPES_CACHED_BY_DEFAULT
# Undefine id so it can be used as an attribute name
- undef_method :id
+ undef_method(:id) if method_defined?(:id)
end
module ClassMethods