问题
i will get the Array of Answers
but how to get the Answered users info;
the flow is Get List of Posts, Post User Info, Post User Followers Count, Post Likes Count, Login User Liked The Post True or False, Answers, Answered User Info and Answered User Followers Count
exports.GetPostList = function(req, res) {
var SkipCoun = 0;
SkipCoun = parseInt(req.params.Limit) * 10;
QuestionsPostModel.QuestionsPostType.find({}, {} , {sort:{createdAt : -1}, skip: SkipCoun, limit: 10 }, function(err, result) {
if(err) {
res.status(500).send({status:"False", message: "Some error occurred while Find Following Users ."});
} else {
const GetUserData = (result) =>
Promise.all(
result.map(info => getPostInfo(info))
).then(
results => {
let [UserInfo, UserFollowers, PostRatingCount, UserRatedCount, AnswersCount, AswersArray ] =
results.reduce(([allOne, allTwo, allThree, allFour, allFive, allSix ], [one, two, three, four, five, six]) =>
[allOne.concat([one]), allTwo.concat([two]), allThree.concat([three]), allFour.concat([four]), allFive.concat([five]), allSix.concat([six])], [ [], [], [], [], [], [] ]);
res.send({ status: "True", UserInfo: UserInfo, UserFollowers: UserFollowers, PostRatingCount: PostRatingCount, UserRatedCount: UserRatedCount, AnswersCount:AnswersCount, AswersArray:AswersArray })
}
).catch(err => res.send({ status: "Fale",Error: err}) );
const getPostInfo = info =>
Promise.all([
UserModel.UserType.findOne({'_id': info.UserId }, usersProjection).exec(),
FollowModel.FollowUserType.count({'UserId': info.UserId}).exec(),
RatingModel.QuestionsRating.count({'PostId': info._id , 'ActiveStates':'Active' }).exec(),
RatingModel.QuestionsRating.count({'UserId': req.params.UserId, 'PostId': info._id, 'PostUserId': info.UserId, 'ActiveStates':'Active'}).exec(),
AnswerModel.QuestionsAnwer.count({'PostId': info._id , 'ActiveStates':'Active' }).exec(),
AnswerModel.QuestionsAnwer.find({ 'PostId':info._id }, 'AnswerText UserId Date' ).exec()
]);
GetUserData(result);
}
});
};
How to Get The Result
回答1:
as you formed the array, and you are passing it inside Promise.all() .
and you just need the data.
Promise.all() docs.
see Below Code (we can just do as promise .then() and .catch()):
exports.GetPostList = function (req, res) {
var SkipCoun = 0;
SkipCoun = parseInt(req.params.Limit) * 10;
QuestionsPostModel.QuestionsPostType.find({}, {}, { sort: { createdAt: -1 }, skip: SkipCoun, limit: 10 }, function (err, result) {
if (err) {
res.status(500).send({ status: "False", message: "Some error occurred while Find Following Users ." });
} else {
const GetUserData = (result) =>
Promise.all(
result.map(info => getPostInfo(info))
).then(
results => {
let [UserInfo, UserFollowers, PostRatingCount, UserRatedCount, AnswersCount, AswersArray] =
results.reduce(([allOne, allTwo, allThree, allFour, allFive, allSix], [one, two, three, four, five, six]) =>
[allOne.concat([one]), allTwo.concat([two]), allThree.concat([three]), allFour.concat([four]), allFive.concat([five]), allSix.concat([six])], [[], [], [], [], [], []]);
res.send({ status: "True", UserInfo: UserInfo, UserFollowers: UserFollowers, PostRatingCount: PostRatingCount, UserRatedCount: UserRatedCount, AnswersCount: AnswersCount, AswersArray: AswersArray })
}
).catch(err => res.send({ status: "Fale", Error: err }));
const getPostInfo = info =>
Promise.all([
UserModel.UserType.findOne({ '_id': info.UserId }, usersProjection).exec(),
FollowModel.FollowUserType.count({ 'UserId': info.UserId }).exec(),
RatingModel.QuestionsRating.count({ 'PostId': info._id, 'ActiveStates': 'Active' }).exec(),
RatingModel.QuestionsRating.count({ 'UserId': req.params.UserId, 'PostId': info._id, 'PostUserId': info.UserId, 'ActiveStates': 'Active' }).exec(),
AnswerModel.QuestionsAnwer.count({ 'PostId': info._id, 'ActiveStates': 'Active' }).exec(),
AnswerModel.QuestionsAnwer.find({ 'PostId': info._id }, 'AnswerText UserId Date').exec()
]).then(data => {
let userData = data[0];
let followCount = data[1];
let ratingCount = data[2];
let ratingCountBy_postId = data[3];
let answerCount = data[4];
let answers = data[5];
// now you may need to construct some object or something and pass data as you required.
let result = {
user: userData,
follow_count: followCount,
rating_count: ratingCount,
rating_countBy_postId: ratingCountBy_postId,
answer_count: answerCount,
answers: answers
};
}).catch(error => {
console.log(error)
})
GetUserData(result);
}
});
};
回答2:
exports.GetPostList = function (req, res) {
var SkipCoun = 0;
SkipCoun = parseInt(req.params.Limit) * 10;
QuestionsPostModel.QuestionsPostType.find({}, {}, { sort: { createdAt: -1 }, skip: SkipCoun, limit: 10 }, function (err, result) {
if (err) {
res.status(500).send({ status: "False", message: "Some error occurred while Find Following Users ." });
} else {
const GetUserData = (result) =>
Promise.all(
result.map(info => getPostInfo(info))
).then( result =>{ console.log(result); res.send({ status: "True", data: result }) }
).catch(err => res.send({ status: "False", Error: err }));
const getPostInfo = info =>
Promise.all([
UserModel.UserType.findOne({ '_id': info.UserId }, usersProjection).exec(),
FollowModel.FollowUserType.count({ 'UserId': info.UserId }).exec(),
RatingModel.QuestionsRating.count({ 'PostId': info._id, 'ActiveStates': 'Active' }).exec(),
RatingModel.QuestionsRating.count({ 'UserId': req.params.UserId, 'PostId': info._id, 'PostUserId': info.UserId, 'ActiveStates': 'Active' }).exec(),
AnswerModel.QuestionsAnwer.count({ 'PostId': info._id, 'ActiveStates': 'Active' }).exec(),
AnswerModel.QuestionsAnwer.find({ 'PostId': info._id }, 'AnswerText UserId Date').exec()
]).then(data => {
let UserData = data[0];
let followCount = data[1];
let ratingCount = data[2];
let UserRating = data[3];
let AnswerCount = data[4];
let Answerdata = data[5];
var AnswersArray= new Array();
return GetAnsUserData();
async function GetAnsUserData(){
for (let ansInfo of Answerdata) {
await getAnswerInfo(ansInfo);
}
let result = {
_id: info._id,
UserId: UserData._id,
UserName: UserData.UserName,
UserCategoryId: UserData.UserCategoryId,
UserCategoryName: UserData.UserCategoryName,
UserImage: UserData.UserImage,
UserCompany: UserData.UserCompany,
UserProfession: UserData.UserProfession,
Followers:followCount,
PostTopicId: info.PostTopicId,
PostTopicName: info.PostTopicName,
PostDate: info.PostDate,
PostText: info.PostText ,
PostLink: info.PostLink,
PostImage: info.PostImage,
PostVideo: info.PostVideo,
RatingCount: ratingCount,
UserRating: UserRating,
AnswersCount: AnswerCount,
Answers: AnswersArray,
};
return result;
}
function getAnswerInfo(ansInfo){
return new Promise(( resolve, reject )=>{
UserModel.UserType.findOne({'_id': ansInfo.UserId }, usersProjection, function(err, AnsUserData) {
if(err) {
res.send({status:"Fale", Error:err });
reject(err);
} else {
FollowModel.FollowUserType.count({'UserId': AnsUserData._id}, function(newerr, count) {
if(newerr){
res.send({status:"Fale", Error:newerr });
reject(newerr);
}else{
var newArray = [];
newArray.push( {
_id: ansInfo._id,
UserId: AnsUserData._id,
UserName: AnsUserData.UserName,
UserCategoryId: AnsUserData.UserCategoryId,
UserCategoryName: AnsUserData.UserCategoryName,
UserImage: AnsUserData.UserImage,
UserCompany: AnsUserData.UserCompany,
UserProfession: AnsUserData.UserProfession,
Followers: count,
Date: ansInfo.Date,
PostId: ansInfo.PostId,
PostUserId: ansInfo.PostUserId ,
AnswerText: ansInfo.AnswerText
}
);
AnswersArray.push(newArray[0]);
resolve(newArray[0]);
}
});
}
});
});
}
}).catch(error => {
console.log(error)
})
GetUserData(result);
}
});
};
Finally I get The Answer Thanks To ALL
来源：https://stackoverflow.com/questions/48597193/node-js-nested-loop-results-finally-push-to-single-array