from django.db import models

class Place(models.Model):
    name = models.CharField(max_length=100, verbose_name="地点名称")
    lng = models.FloatField(verbose_name="经度")
    lat = models.FloatField(verbose_name="纬度")
    parent = models.ForeignKey('self', null=True, blank=True, related_name='children', on_delete=models.CASCADE, verbose_name="父节点")

    class Meta:
        verbose_name = "地点标签"
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.name