我正在尝试进行一些数据库查询并检查一些数据。如果某些条件不匹配,它应该创建一个错误并使用 next(err) 转发。
问题是,它向我发送错误作为响应,但它试图继续。所以我的 node.js 应用程序出现错误。
Purchase.findAndCount({where: {fk_product: productId, fk_buyer: req.decoded.id}}).then((numPurchases) => {
// product purchased?
if (numPurchases.count < 1) {
const errNotBought = new Error("you did not buy this product");
errNotBought.status = 403;
return next(errNotBought); // <--- it should break up here
}
}).then(() => {
res.send({status: true, data: 'product'}) // <-- stacktrace point this line
})
错误是:未处理的拒绝错误[ERR_HTTP_HEADERS_SENT]:发送到客户端后无法设置 header
最佳答案
return
仅从当前回调函数返回,它不会以任何方式停止 promise 链。你正在寻找
Purchase.findAndCount({where: {fk_product: productId, fk_buyer: req.decoded.id}}).then(numPurchases => {
// product purchased?
if (numPurchases.count < 1) {
const errNotBought = new Error("you did not buy this product");
errNotBought.status = 403;
next(errNotBought); // <--- it should break up here
} else {
res.send({status: true, data: 'product'});
}
});
关于node.js - 错误 : Cannot set headers after they are sent to the client (with next),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54387779/