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/base.rb, line 146
146:     def initialize(errors)
147:       @errors = errors
148:     end