slack-clone-using-HTML-over-the-Wire/app/chat/models.py

from django.db import models
from django.contrib.auth.models import User


class Client(models.Model):
    """
    Clients for users
    """

    user = models.ForeignKey(User, on_delete=models.CASCADE)
    channel = models.CharField(max_length=200, blank=True, null=True, default=None)
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.user.username


class Room(models.Model):
    """
    Rooms for users
    """

    users_subscribed = models.ManyToManyField(User, related_name="users_subscribed")
    clients_active = models.ManyToManyField(Client, related_name="clients_active")
    name = models.CharField(max_length=255, blank=True, null=True, default=None)
    is_group = models.BooleanField(default=False)

    def __str__(self):
        return self.name


class Message(models.Model):
    """
    Messages for users
    """

    user = models.ForeignKey(User, on_delete=models.CASCADE)
    room = models.ForeignKey(Room, on_delete=models.CASCADE)
    text = models.TextField()
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.text