compras.py 文件源码

def get(self, request, instance, redirect_url, *args, **kwargs):
        itens_compra = instance.itens_compra.all()
        pagamentos = instance.parcela_pagamento.all()

        instance.pk = None
        instance.id = None
        instance.status = '0'
        instance.save()

        for item in itens_compra:
            item.pk = None
            item.id = None
            item.save()
            instance.itens_compra.add(item)

        for pagamento in pagamentos:
            pagamento.pk = None
            pagamento.id = None
            pagamento.save()
            instance.parcela_pagamento.add(pagamento)

        return redirect(reverse_lazy(redirect_url, kwargs={'pk': instance.id}))