我有一个 Node js 应用程序，并且我不断收到“发送错误后无法设置 header ”的路由之一。
路线的作用:
我的应用中的用户具有特定的访问级别，因此此路由会遍历用户 accessLevel 数组并找到适合此路由的访问级别。并且根据调用该路由的用户的访问级别，它会执行不同的操作。
代码:
app.post('/bios/approve', isLoggedIn, function(req, res) {
for (var i = 0; i < req.user.accessLevel.length; i++) {
if (req.user.accessLevel[i] === "Bio Officer") {
Bio.findOneAndUpdate({userID: req.body.userID, bioForSector: req.body.bioForSector}, {
background: req.body.background,
experience: req.body.experience,
skills: req.body.skills,
bioStatus: req.body.bioStatus
}, function(err, editedBio) {
if (err)
console.log("Error while editing Pending Bio is " + err);
else if (editedBio) {
User.findOneAndUpdate({accessLevel: "Bio Designer"}, {
$push: {biosPending: editedBio._id}
}, function(err, user) {
if (err) {
console.log("The error while finding lineManager is " + err);
} else if (user) {User.findOneAndUpdate({accessLevel: "Bio Officer"}, {
$pull: {
biosPending: editedBio._id
}
}, function(err, bioOfficer) {
if (err) {
console.log("The error while finding lineManager is " + err);
}
res.json("Bio Done!")
});
}
});
}
});
} else if (req.user.accessLevel[i] === "Bio Designer") {
// Currently Empty
} else {
Bio.findOneAndUpdate({userID: req.body.userID,bioForSector: req.body.bioForSector}, {
background: req.body.background,
experience: req.body.experience,
skills: req.body.skills,
bioStatus: req.body.bioStatus
}, function(err, editedBio) {
if (err)
console.log("Error while editing Pending Bio is " + err);
else if (editedBio) {
User.findOneAndUpdate({accessLevel: "Bio Officer"}, {$push: {biosPending: editedBio._id}
}, function(err, user) {
if (err) {
console.log("The error while finding lineManager is " + err);
} else if (user) {
User.findOneAndUpdate({email: editedBio.lineManagerEmail}, {$pull: {biosPending: editedBio._id}
}, function(err, bioOfficer) {
if (err) {
console.log("The error while finding lineManager is " + err);
}
res.json("bio Done!")
});
}
});
}
});
}
}
});
任何帮助将不胜感激。有谁知道我做错了什么？
最佳答案
Can't Set Headers After they are sent
表示您针对单个请求多次发送响应。
从你的代码中我可以建议的是:
for (var i = 0; i < req.user.accessLevel.length; i++) {
if(--req.user.accessLevel.length == 0){
res.json("Bio Done!")
}
}
关于javascript - 发送后无法设置 header - NodeJS，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38117184/