Raised when there are multiple errors while doing a mass assignment through the attributes method. The exception has an errors property that contains an array of AttributeAssignmentError objects, each corresponding to the error while assigning to an attribute.

Methods
N
Attributes
[R] errors
Class Public methods
new(errors)

Source: show | on GitHub 

# File activerecord/lib/active_record/errors.rb, line 178
def initialize(errors)
  @errors = errors
end