Question

我有模特

class Event(models.Model):
    some_field = models.CharField()


class Ticket(models.Model):
    event = models.ForeignKey(Event)

我如何设置模型票证字段事件，带有some_field字段的事件？示例：

Ticket.objects.create(event__some_field = 'value')

您如何实现这一目标？

ps。我无法在我的情况下使用ticket.event_id = event_id和ticket.event =事件（我不想向数据库请求）

Answer 1

您必须与创建故障单分开创建和保存事件实例。

event = Event(some_field='value')
event.save()

ticket = Ticket()
ticket.event = event
ticket.save()

如果您想更新与故障单相关的现有事件：

ticket.event.some_field = "new value"
ticket.event.save()
# no need to save ticket here, because nothing has changed in the relationship between ticket and event

我如何通过另一个字段模型设置值

1 个答案: