使用forEach（）将数组附加到对象中

我试图添加对象（事务）的数组到数组（票据）使用forEach循环和数组[键] .transactions添加对象。 我也尝试使用推，但也没有工作。

一些帮助将是可爱的。

var bills = [{ "_id": "5499aece1d7be6c6a3000001", "billName": "Insurance", "startDate": "2014-12-15T00:00:00.000Z", "amount": 2400, "type": 4, "timestamp": "2014-12-23T18:05:02.987Z", "__v": 0 }, { "_id": "549bf0597886c3763e000001", "billName": "Leasing", "startDate": "2014-12-25T00:00:00.000Z", "endDate": "2017-10-14T22:00:00.000Z", "amount": 16500, "type": 4, "timestamp": "2014-12-25T11:09:13.957Z", "__v": 0 }]; var transactions = [{ "_id": "549ea8c957b654ef64000003", "billId": "5499aece1d7be6c6a3000001", "paymentDate": "2014-12-27T12:40:41.311Z", "amount": 2400, "timestamp": "2014-12-27T12:40:41.311Z", "__v": 0 }, { "_id": "549ea8e632ed3f6265000001", "billId": "549bf0597886c3763e000001", "paymentDate": "2014-12-27T12:41:10.582Z", "amount": 16500, "timestamp": "2014-12-27T12:41:10.582Z", "__v": 0 }, { "_id": "549ea93452ebbd8366000001", "billId": "549bf0597886c3763e000001", "paymentDate": "2014-12-27T12:42:28.744Z", "amount": 16500, "timestamp": "2014-12-27T12:42:28.745Z", "__v": 0 }]; 

和

  var test = []; bills.forEach(function (bill, key) { test.push(bill); transactions.forEach(function (transaction) { if (transaction.billId == bill._id) test[key].transactions = transaction; }); }); console.log(test); 

最终结果应该是testing对象将账单加上每个账单对象内部的事务作为一个对象数组。

编辑

问题是这个代码在JSfiddle中工作，但是当我应用从mongoose find（）来的数组时，这个代码不起作用。 这里是完整的代码：

  app.get('/getbills', function(req,res) { //get all bills allBills = Bills.find().exec(); //get all transactions allTransactions = Transactions.find().exec(); //aggregate bills and transactions in a promise promise.all([allBills, allTransactions]).then(function(results){ var bills = results[0]; var transactions = results[1]; var test = []; // var test.transactions = []; bills.forEach(function(bill, key) { bill.transactions = transactions.filter(function (transaction) { return transaction.billId === bill._id; }); console.log(bill.transactions); test.push(bill); }); console.log(transactions); res.send(test); }); }); 

这个，返回这个：

 [{"_id":"5499aece1d7be6c6a3000001","billName":"Jeep Insurance","startDate":"2014-12-15T00:00:00.000Z","amount":2400,"type":4,"timestamp":"2014-12-23T18:05:02.987Z","__v":0},{"_id":"549bf0597886c3763e000001","billName":"Leasing","startDate":"2014-12-25T00:00:00.000Z","endDate":"2017-10-14T22:00:00.000Z","amount":16500,"type":4,"timestamp":"2014-12-25T11:09:13.957Z","__v":0},{"_id":"54a014bfac01ca3526000001","billName":"Test","startDate":"2014-10-28T00:00:00.000Z","endDate":"2017-12-19T23:00:00.000Z","amount":1000,"type":4,"timestamp":"2014-12-28T14:33:35.233Z","__v":0}] 

Muchas gracias！

Answer 1

尝试这个

 bills.forEach(function(bill, key) { bill.transactions = transactions.filter(function (el) { return el.billId === bill._id; }); }); console.log(bills); 

演示： http : //jsbin.com/bocasi/5/edit?js,console

jQuery版本

 $.each(bills, function(i, bill) { bill.transactions = $.grep(transactions, function (el) { return el.billId === bill._id; }); }); console.log(bills); 

演示： http : //jsbin.com/bocasi/4/edit?js,console

更新：

 app.get('/getbills', function(req, res) { var allBills = Bills.find().lean().exec(); var allTransactions = Transactions.find().lean().exec(); promise.all([allBills, allTransactions]).then(function(results) { var bills = results[0]; var transactions = results[1]; var test = []; bills.forEach(function(bill, key) { bill.transactions = transactions.filter(function(transaction) { return transaction.billId === bill._id; }); }); res.send(bills); }); }); 

Answer 2

只需直接修改账单对象。 （无论如何，你正在这样做）

 bills.forEach(function (bill) { bill.transactions = transactions.filter(function (transaction) { return transaction.billId === bill._id; }); }); 

随着你的编辑（而不能够testing它），我认为它应该是这样的：

 app.get('/getbills', function (req, res) { var allBills = Bills.find().exec(); var allTransactions = Transactions.find().exec(); promise.all([allBills, allTransactions]).then(function (results) { var bills = results[0]; var transactions = results[1]; bills.forEach(function (bill) { bill.transactions = transactions.filter(function (transaction) { return transaction.billId === bill._id; }); }); res.send(bills); }); }); 

Answer 3

像这样的东西？

 $.each(bills, function(index, bill){ var arr_temp = []; $.each(transactions, function(index, transaction){ if(bill._id == transaction.billId){ arr_temp.push(transaction); } }); bill.transactions = arr_temp; }); console.log(bills); 

http://jsfiddle.net/8c7a89s2/1/