Django 模型层元数据CheatSheet

https://docs.djangoproject.com/zh-hans/4.0/ref/models/options/

abstract，用来继承

class OwnerBaseModel(models.Model):
    """节点关系人基础模型"""
    name = models.CharField(verbose_name='中文姓名', max_length=4, null=True, blank=True)
    email = models.CharField(verbose_name='邮箱前缀', max_length=36, primary_key=True)
    phone = models.CharField(verbose_name='手机号码', max_length=11, null=True, blank=True)
    class Meta:
        abstract = True
    def __str__(self):
        return f'{self.email}'
class OwnerModel(OwnerBaseModel):
    """节点负责人 模型类"""
    class Meta:
        verbose_name = '节点负责人'
        verbose_name_plural = verbose_name
class OwnerLeaderModel(OwnerBaseModel):
    """节点负责人LD 模型类"""
    class Meta:
        verbose_name = '节点负责人LD'
        verbose_name_plural = verbose_name

verbose_name，为数据表增加注释信息

class Meta:
    verbose_name = '主机表'
    verbose_name_plural = verbose_name

indexs，增加索引

class Meta:
    indexes = [
        models.Index(fields=['realname', 'nickname'])
    ]

unique_together，联合唯一

class Meta:
    unique_together = ('ip_address', 'port_number')

ordering，排序，在查询操作时，记录会按照这个排序方式进行显示

class Meta:
    # 先根据create_time降序，再根据username升序
    ordering = ['-create_time', 'username']

permissions，权限

class Meta:
    permissions = [
        ('comment_pulish', '发票评论的权限'),
    ]

default_permissions 默认权限