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-rw-r--r--activemodel/lib/active_model/errors.rb13
1 files changed, 11 insertions, 2 deletions
diff --git a/activemodel/lib/active_model/errors.rb b/activemodel/lib/active_model/errors.rb
index 685e235730..696e6d31da 100644
--- a/activemodel/lib/active_model/errors.rb
+++ b/activemodel/lib/active_model/errors.rb
@@ -310,9 +310,9 @@ module ActiveModel
# <tt>:strict</tt> option can also be set to any other exception.
#
# person.errors.add(:name, :invalid, strict: true)
- # # => ActiveModel::StrictValidationFailed: name is invalid
+ # # => ActiveModel::StrictValidationFailed: Name is invalid
# person.errors.add(:name, :invalid, strict: NameIsInvalid)
- # # => NameIsInvalid: name is invalid
+ # # => NameIsInvalid: Name is invalid
#
# person.errors.messages # => {}
#
@@ -531,6 +531,15 @@ module ActiveModel
end
# Raised when unknown attributes are supplied via mass assignment.
+ #
+ # class Person
+ # include ActiveModel::AttributeAssignment
+ # include ActiveModel::Validations
+ # end
+ #
+ # person = Person.new
+ # person.assign_attributes(name: 'Gorby')
+ # # => ActiveModel::UnknownAttributeError: unknown attribute 'name' for Person.
class UnknownAttributeError < NoMethodError
attr_reader :record, :attribute