Use the flat_map method.

Thanks to @jeremy to teach me this one.
rails · Oct 3, 2012 · d56b5da · d56b5da
1 parent 8606200
commit d56b5da
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/activemodel/lib/active_model/validations.rb b/activemodel/lib/active_model/validations.rb
@@ -188,9 +188,9 @@ def validators
       #   #       #<ActiveModel::Validations::InclusionValidator:0x007fe603bb8780 @attributes=[:age], @options={:in=>0..99}>
       #   #    ]
       def validators_on(*attributes)
-        attributes.map do |attribute|
+        attributes.flat_map do |attribute|
           _validators[attribute.to_sym]
-        end.flatten
+        end
       end
 
       # Returns +true+ if +attribute+ is an attribute method, +false+ otherwise.