mongoid as_document error

Question

I am using mongoid with devise invitable,

after assigning roles to user I found the following error

"**undefined method `as_document' for Array **" , any suggestions ?

invitable = find_or_initialize_with_error_by(:email, attributes[:email])
invitable.attributes = attributes
# scope_id attribute does not set properly
invitable.roles.map {|r| r.scope_id = attributes[:roles_attributes]["0"][:scope_id]}

if invitable.persisted? && !invitable.invited?
  invitable.errors.add(:email, :taken)
elsif invitable.email.present? && invitable.email.match(Devise.email_regexp)
  invitable.invite!
end

Whats wrong I am doing ?

Answer 1

This is likely because as_document doesn't work against an array, only single objects.