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-rw-r--r--railties/doc/guides/source/activerecord_validations_callbacks.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/railties/doc/guides/source/activerecord_validations_callbacks.txt b/railties/doc/guides/source/activerecord_validations_callbacks.txt
index 568ab8bc23..4dfa92e542 100644
--- a/railties/doc/guides/source/activerecord_validations_callbacks.txt
+++ b/railties/doc/guides/source/activerecord_validations_callbacks.txt
@@ -256,6 +256,8 @@ class LineItem < ActiveRecord::Base
end
------------------------------------------------------------------
+NOTE: If you want to validate the presence of a boolean field (where the real values are true and false), you will want to use validates_inclusion_of :field_name, :in => [true, false] This is due to the way Object#blank? handles boolean values. false.blank? # => true
+
The default error message for +validates_presence_of+ is "_can't be empty_".
=== The +validates_size_of+ helper