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.

Methods

Attributes

[R] attribute
[R] record

Class Public methods

new(record, attribute)

📝 Source code
# File activemodel/lib/active_model/errors.rb, line 511
    def initialize(record, attribute)
      @record = record
      @attribute = attribute
      super("unknown attribute '#{attribute}' for #{@record.class}.")
    end
🔎 See on GitHub