这是发生了什么。我先保存新公司，然后在保存之前将_id附加到每个新用户。我遇到的问题是返回一个回复。当我把res.json（）放入重复的函数中时，显然我得到一个错误，因为我已经有第一次循环时发送的响应。
那么，我如何调用signupSeq（record，res）但是等待异步方法完成所以我知道我是否有错误？
var signupSeq = function(req, res) {
async.waterfall([
function(callback) {
console.log(req);
if (req.company._id===undefined){
var company = new Company(req.company);
company.save(function(err){
if (err) {
console.log('save error');
callback(err);
}else{
callback(null, company._id);
}
})
}else{
callback(null, req.company._id); //pass teh plain ID if it's not a new name:xxx
}
},
function(companyId, callback) {
delete req.company
req.company = companyId
// Init Variables
var user = new User(req);
var message = null;
// Add missing user fields
user.provider = 'local';
user.displayName = user.firstName + ' ' + user.lastName;
// Then save the user
user.save(function(err) {
if (err) {
callback(err);
} else {
callback(null, user);
}
});
}
], function (err, result) {
if(err){
console.log(result+'funciton result')
return err
// res.status(400).send({
// message: errorHandler.getErrorMessage(err)
// });
}else{
console.log(result+'funciton result')
return result
//res.json(result)
}
});
}
exports.saveMany = function(req, res){
async.each(req.body, function(record, callback) {
// Perform operation on record.body here.
console.log('Processing record.body ' + record);
// Do work to process record.body here
var x = signupSeq(record, res)
console.log(x+'<<<<<<<value of x');
console.log('record.body processed');
callback();
}, function(err){
// if any of the record.body processing produced an error, err would equal that error
if( err ) {
res.json(err);
// One of the iterations produced an error.
// All processing will now stop.
console.log('A record.body failed to process');
} else {
res.json('Success');
console.log('All files have been processed successfully');
}
});
}
答案 0 :(得分：1)
您可以在signupSeg功能中添加回调（cb）。
var signupSeq = function(req, res, cb) {
async.waterfall([
function(callback) {
console.log(req);
if (req.company._id===undefined){
var company = new Company(req.company);
company.save(function(err){
if (err) {
console.log('save error');
callback(err);
}else{
callback(null, company._id);
}
})
}else{
callback(null, req.company._id); //pass teh plain ID if it's not a new name:xxx
}
},
function(companyId, callback) {
delete req.company
req.company = companyId
// Init Variables
var user = new User(req);
var message = null;
// Add missing user fields
user.provider = 'local';
user.displayName = user.firstName + ' ' + user.lastName;
// Then save the user
user.save(function(err) {
if (err) {
callback(err);
} else {
callback(null, user);
}
});
}
], function (err, result) {
if(err){
console.log(result+'funciton result')
cb(err)
// res.status(400).send({
// message: errorHandler.getErrorMessage(err)
// });
}else{
console.log(result+'funciton result')
cb(null,result)
//res.json(result)
}
});
}
exports.saveMany = function(req, res){
async.each(req.body, function(record, callback) {
// Perform operation on record.body here.
console.log('Processing record.body ' + record);
// Do work to process record.body here
signupSeq(record, res,function(err,result){
var x= result;
console.log(x+'<<<<<<<value of x');
console.log('record.body processed');
callback();
})
}, function(err){
// if any of the record.body processing produced an error, err would equal that error
if( err ) {
res.json(err);
// One of the iterations produced an error.
// All processing will now stop.
console.log('A record.body failed to process');
} else {
res.json('Success');
console.log('All files have been processed successfully');
}
});
}
这样在asyn.each中，signipSeg必须在callback（）调用之前完成。 希望这会有所帮助。