[BE] build object simply with spread syntax

[ryuina]

YoungleehanKorean/server/controllers/product.js

Lines 150 to 159 in a45be18

	const args = {};
	if (level && level.length > 0) args.category = level;
	if (age && age.length > 0) args.ageCategory = age;
	if (priceRange && priceRange.length) {
	args.price = { $gte: priceRange[0], $lte: priceRange[1] };
	}
	const products = await Product.find(args);

const args = {
  ...((level && level.length > 0) && { category: level }),
  ...((age && age.length > 0) && { ageCategory: age }),
  ...((priceRange && priceRange.length)  && { price: { $gte: priceRange[0], $lte: priceRange[1] } }),
}; 

 const products = await Product.find(args); 

... is spread syntax. It really helps a lot!
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax