models.py

class Room(models.Model):
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)
    room_number = models.SmallIntegerField()

    def __str__(self):
        return f'Room №{self.room_number}'


class UserProfiles(models.Model):
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)
    name = models.CharField(max_length=100)

    def __str__(self):
        return f'{self.name}'


class Pc(models.Model):
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)
    title = models.CharField(max_length=100)
    ram = models.SmallIntegerField()
    cpu = models.CharField(max_length=20)
    gpu = models.CharField(max_length=20)

    def __str__(self):
        return f'{self.title}'


class PcUsers(models.Model):
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)
    pc = models.ForeignKey(Pc, on_delete=models.PROTECT, related_name='pc_users')
    user = models.ForeignKey(UserProfiles, on_delete=models.PROTECT)

    def __str__(self):
        return f'{self.pc}: {self.user}'


class PcRooms(models.Model):
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)
    pc = models.ForeignKey(Pc, on_delete=models.PROTECT, related_name='pc_rooms')
    room = models.ForeignKey(Room, on_delete=models.PROTECT)

    def __str__(self):
        return f'{self.pc}: {self.room}'