from django.db import models


class Tag(models.Model):
    name = models.CharField(max_length=255)


class Topic(models.Model):
    name = models.CharField(max_length=255)
    numbered = models.BooleanField(default=False)
    rootTopic = models.ForeignKey('self', blank=True, on_delete=models.CASCADE)


class Blogpost(models.Model):
    created = models.DateTimeField(auto_now_add=True)
    last_modified = models.DateTimeField(auto_now=True)
    title = models.CharField(max_length=255)
    tags = models.ManyToManyField(Tag)
    topics = models.ForeignKey(Topic, blank=True, on_delete=models.CASCADE)