gistfile1.py

    def forwards(self, orm):
        "Write your forwards methods here."
        def set_real_type(obj):
            obj.real_type = orm["contenttypes.ContentType"].objects.get_for_model(type(obj))
            obj.save()

        # migrate existing objects
        for obj in orm.Book.objects.all():
            set_real_type(obj)
        
        for obj in orm.Journal.objects.all():
            set_real_type(obj)

        for obj in orm.BookChapter.objects.all():
            set_real_type(obj)

        for obj in orm.JournalArticle.objects.all():
            set_real_type(obj)
            
        for obj in orm.ConferenceProceedings.objects.all():
            set_real_type(obj)
            
        for obj in orm.ConferenceArticle.objects.all():
            set_real_type(obj)
            
        for obj in orm.TechnicalReport.objects.all():
            set_real_type(obj)
            
        for obj in orm.Thesis.objects.all():
            set_real_type(obj)
            
        for obj in orm.MasterThesis.objects.all():
            set_real_type(obj)
            
        for obj in orm.PhdThesis.objects.all():
            set_real_type(obj)