v0.30: product pages, categories, sale prices and order status timeline

internal/database/migrate.go

@@ -77,6 +77,25 @@ func Migrate(ctx context.Context, pool *pgxpool.Pool) error {
 			quantity INT NOT NULL CHECK (quantity > 0)
 		)`,
 		`CREATE INDEX IF NOT EXISTS idx_orders_user ON orders (user_id)`,
+		`CREATE TABLE IF NOT EXISTS categories (
+			id SERIAL PRIMARY KEY,
+			name VARCHAR(100) NOT NULL UNIQUE,
+			slug VARCHAR(100) NOT NULL UNIQUE,
+			description TEXT NOT NULL DEFAULT '',
+			sort_order INT NOT NULL DEFAULT 0,
+			created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+		)`,
+		`ALTER TABLE products ADD COLUMN IF NOT EXISTS category_id INT REFERENCES categories(id) ON DELETE SET NULL`,
+		`ALTER TABLE products ADD COLUMN IF NOT EXISTS sale_price NUMERIC(10,2)`,
+		`INSERT INTO categories (name, slug, sort_order) VALUES
+			('Электроника', 'elektronika', 1),
+			('Одежда', 'odezhda', 2),
+			('Дом и сад', 'dom-i-sad', 3),
+			('Аксессуары', 'aksessuary', 4),
+			('Разное', 'raznoe', 5)
+		ON CONFLICT (slug) DO NOTHING`,
+		`UPDATE products p SET category_id = c.id
+		 FROM categories c WHERE p.category = c.name AND p.category_id IS NULL`,
 	}
 
 	for _, q := range queries {