from django.db import models


class Tag(models.Model):

    def __str__(self) -> str:
        return str(self.name)

    name = models.CharField(max_length=255, unique=True)


class Topic(models.Model):

    def __str__(self) -> str:
        return str(self.name)

    name = models.CharField(max_length=255, unique=True)
    numbered = models.BooleanField(default=False)
    rootTopic = models.ForeignKey('self', blank=True, null=True, on_delete=models.CASCADE)


class Blogpost(models.Model):

    def __str__(self) -> str:
        return str(self.title)

    created = models.DateTimeField(auto_now_add=True)
    last_modified = models.DateTimeField(auto_now=True)
    title = models.CharField(max_length=255, unique=True)
    tags = models.ManyToManyField(Tag)
    topic = models.ForeignKey(Topic, blank=True, null=True, on_delete=models.CASCADE)
    mdfile = models.CharField(max_length=255)