murodalidev />

Every challenge, every adversity, contains within it the seeds of opportunity and growth

class Cart(models.Model):
    user = models.OneToOneField(
        User,
        on_delete=models.CASCADE,
        related_name="cart",
        verbose_name=_("user"),
        null=True,
        blank=True,
        help_text=_("User is null for guest carts"),
    )
    session_key = models.CharField(
        _("session key"),
        max_length=40,
        blank=True,
        null=True,
        db_index=True,
        help_text=_("Session key for guest carts"),
    )
    created_at = models.DateTimeField(_("created at"), auto_now_add=True)
    updated_at = models.DateTimeField(_("updated at"), auto_now=True)

class Cart(models.Model):
    ....

    class Meta:
        ....
        constraints = [
            models.CheckConstraint(
                check=(
                    models.Q(user__isnull=False) | models.Q(session_key__isnull=False)
                ),
                name="cart_must_have_user_or_session",
            ),
        ]

user maydoni bo‘sh emas yoki session_key maydoni bo‘sh emas bo‘lishi kerak.

ALTER TABLE cart
ADD CONSTRAINT cart_must_have_user_or_session
CHECK (user_id IS NOT NULL OR session_key IS NOT NULL);

>>> import magic
>>> magic.from_file("testdata/test.pdf", mime=True)
'application/pdf'

upstream app_servers {
  server 127.0.0.1:8000;
}

server {
  listen 80;

  location ^~ /admin/ {
    allow               123.456.789.012;
    allow               123.456.789.013; # va yana bir nechta IP manzilni qoshishingiz mumkin
    deny                all;
    proxy_pass          http://app_servers;
    proxy_read_timeout  90;
    proxy_set_header    Host $host;
    proxy_set_header    X-Real-IP $remote_addr;
    proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
  }

  location / {
    proxy_pass          http://app_servers;
    proxy_read_timeout  90;
    proxy_set_header    Host $host;
    proxy_set_header    X-Real-IP $remote_addr;
    proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
  }
}