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-rw-r--r--activemodel/lib/active_model/validations/acceptance.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activemodel/lib/active_model/validations/acceptance.rb b/activemodel/lib/active_model/validations/acceptance.rb
index ea3a6b52ab..9ff342d72b 100644
--- a/activemodel/lib/active_model/validations/acceptance.rb
+++ b/activemodel/lib/active_model/validations/acceptance.rb
@@ -54,6 +54,7 @@ module ActiveModel
def define_on(klass)
attr_readers = attributes.reject { |name| klass.attribute_method?(name) }
attr_writers = attributes.reject { |name| klass.attribute_method?("#{name}=") }
+ klass.define_attribute_methods
klass.send(:attr_reader, *attr_readers)
klass.send(:attr_writer, *attr_writers)
end