Django ManyToManyField through

最新推荐文章于 2022-06-23 10:46:45 发布

原创最新推荐文章于 2022-06-23 10:46:45 发布 · 150 阅读

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获取选择字段的choice

obj.get_fileld_display()

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django中@property详解
```
1. @property 可以将python定义的函数“当做”属性访问，从而提供更加友好访问方式，和java中的setter和getter类似。@xxx.setter

ManyToManyField

device_room = models.ManyToManyField(to='Device', through='DeviceRoom', through_fields=('room', 'device'))

class DeviceRoom(models.Model):
    room = models.ForeignKey(Room, verbose_name='房间', on_delete=models.CASCADE, null=True)
    device = models.ForeignKey(Device, verbose_name='设备', on_delete=models.CASCADE, null=True)
    oneField= models.IntegerField('字段一', default=0)


a.device_room.through.objects.all()

In [29]:  a.device_room.through.objects.all()[:2]
Out[29]: <QuerySet [<DeviceRoom: DeviceRoom object (47)>, <DeviceRoom: DeviceRoom object (60)>]>