('invoice_template',models.OneToOneField(default=preferences.models.default_invoice,on_delete=django.db.models.deletion.PROTECT,related_name='invoice_template',to='cotisations.DocumentTemplate',verbose_name='Template for invoices')),
('voucher_template',models.OneToOneField(default=preferences.models.default_voucher,on_delete=django.db.models.deletion.PROTECT,related_name='voucher_template',to='cotisations.DocumentTemplate',verbose_name='Template for subscription voucher')),