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我使用node.js与mongodb和q.js承诺。Node.js链接承诺使用q.js
以下是我的MongoDB架构:
{
UserId: {
type: mongoose.Schema.Types.ObjectId,
ref: 'User'
},
FirstName: String,
LastName: String,
Gender: String,
userDocument: [userDocumentSchema],
userEducation: [userEducationDetailsSchema]
};
var userEducationDetailsSchema = new Schema({
DegreeName: String,
University: String,
});
var userDocumentSchema = new mongoose.Schema({
DocumentName: String,
DocumentPath: String
});
I have following function by chaining promises:
var updateUserDetails = function (req, res) {
var finalResult = [];
/* This is the function to update user using promise.*/
updateUserBasicDetails(req).then(function (req) {
_.each(req.body.userEducation, function (sd) {
return getEducationDetail(req.body._id, sd) /* this fun finds if education details are present or not by iterating usertEducation Array */
.then(function (result) {
if (result) {
/* if education details exist then this will update the details */
return updateEducationDetails(sd, req.body._id).then(
function (result) {
return result;
})
} else {
/*else add the education details*/
return addEducationDetails(sd, req.body._id).then(
function (result) {
return result;
})
}
}).then(function (result) {
finalResult.push(result);
})
})
return JSON.stringify(finalResult);
}).then(function (finalResult) {
res.json({
"token": finalResult /*but here m getting empty result */
})
}).catch(console.log).done();
}
我的查询是:
- 这是实现承诺的chainging的正确方法?
- 在最后的链中,我得到空结果,但是当我打印o/p到控制台我得到正确的结果。
- 我已经完成了getEducationDetail函数的迭代,这是正确的方式还是有其他选择。如果是这样,我怎么能达到相同的。
要返回'finalResult'同步,但值只是异步填充。 – thefourtheye