Question

我正在使用节点js + sequelize。我想通过供应商，价格，交付选项等选定的选项来过滤产品的结果，但我无法理解如何使查询准确。

现在我正在这样做，但此方法仅在选择了所有过滤器（AND运算符）时有效。如果用户只选择1个过滤器或少数过滤器，我该怎么办？

    let vendor = req.query.vendor;
    let priceFrom = req.query.priceFrom;
    let priceTo = req.query.priceTo;
    let delivery = req.query.delivery

            Product.findAll({
                where: {
                    vendor_id: {
                        in: vendor
                    },
                    price: {
                        $between: [priceFrom, priceTo]
                    },
                    {
                    delivery: delivery 
                    }
                }
            }).then(products => {
                res.render('product', {products: products});
                console.log(products)
            });

我现在只有一种方法可以让它为每个场合编写很多if-else语句。

Answer 1

首先检查查询参数并根据这些查询参数创建一个对象，如

let vendor = req.query.vendor;
let priceFrom = req.query.priceFrom;
let priceTo = req.query.priceTo;
let delivery = req.query.delivery
var options = {where: {}};
if(vendor) {
  options.where.vendor_id = {$in: vendor}
}
if(priceFrom && priceTo) {
  options.where.price = {$between: [priceFrom, priceTo]}
}
if(delivery) {
  options.where.delivery = delivery
}
Product.findAll(options)
.then(products => {
  console.log(products)
  res.render('product', {products: products});
})

产品过滤节点js + sequelize

1 个答案: