hi.
the persisted? method returns true after a failed insert.

class SurveyMet

include Mongoid::Document

belongs_to :company

index :company_id, unique: true

end

a = SurveyMet.new
a.company = Company.first
a.save!
true

b = SurveyMet.new
b.company = Company.first
b.save!
=> true
b.persisted?
=> true ----- BUT its not in the DB

b.safely.save! returns the correct error. E11000 duplicate key error