Hi guys!

Please consider the following spec against the latest master:

  context "when relational ids are changed manually" do

    let(:person) do
      Person.create(:ssn => "342-89-2439")
    end

    let(:preference) do
      Preference.create(:name => "Test")
    end

    it "should contain unique id arrays" do
      person.preference_ids = [preference.id]
      preference.person_ids = [person.id]

      person.save
      preference.save

      preference.person_ids.should        == [person.id]
      preference.reload.person_ids.should == [person.id]
    end

  end

It fails in the last expectation because the "person.save"-operation persisted the person.id for "preference". So the preference.reload.person_ids equals actually [person.id, person.id].

Of course the regular way of adding a relational object would be preference.people << person, but let's say I cannot use this for various reasons and I have to execute a .save on each relational partner.

Is there a senseful way to make this spec work?
Maniulations of update_inverse_keys(meta) weren't successful.

I replaced lib/mongoid/dirty.rb line 121

if pushes.any? && pulls.any?
by
if (pushes.any? && pulls.any?) || name[/_ids$/]

but this is obviously hacky.

Thanks in advance,
Frank