Django model meta options for database optimization

                  from django.db import models


class Product(models.Model):
    name = models.CharField(max_length=200)
    sku = models.CharField(max_length=50)
    category = models.ForeignKey('Category', on_delete=models.CASCADE)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    stock = models.IntegerField(default=0)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        db_table = 'shop_products'
        ordering = ['-created_at', 'name']
        verbose_name = 'Product'
        verbose_name_plural = 'Products'

        indexes = [
            models.Index(fields=['category', '-created_at']),
            models.Index(fields=['sku']),
        ]

        unique_together = [
            ['sku', 'category']
        ]

        permissions = [
            ('can_publish_product', 'Can publish product'),
            ('can_feature_product', 'Can feature product on homepage'),
        ]

    def __str__(self):
        return self.name