from django.db import models

class Article(models.Model):

    title = models.CharField(max_length=100)

    pub_date = models.DateTimeField()

    published_on = models.DateField(null=True)

    categories = models.ManyToManyField("Category", related_name="articles")

    def __str__(self):

        return self.title

class Comment(models.Model):

    article = models.ForeignKey(Article, models.CASCADE, related_name="comments")

    text = models.TextField()

    pub_date = models.DateTimeField()

    approval_date = models.DateTimeField(null=True)

    def __str__(self):

        return "Comment to %s (%s)" % (self.article.title, self.pub_date)

class Category(models.Model):

    name = models.CharField(max_length=255)