将MongoDB与流星一起使用的问题

Question

我正在用流星做一个预订网站。我正在尝试使用数据库来存储预订并将其显示在表格中。问题是我无法使用MongoDB。这是代码：

function readBooking() {
var Reservations_db = new Mongo.Collection('reservations');
var name = document.getElementById("nom").value;
var formula = document.getElementById("formule").value;
var time = document.getElementById("time").value;
var length = document.getElementById("length").value;
Reservations_db.insert({ name: name, formula: formula, time: time, length: length });
}
function verifypsw() {
var Reservations_db = new Mongo.Collection('reservations');
if (document.getElementById("psw").value == "massage") {
localStorage.setItem('admin', true);
document.getElementById('verifyid').style.display = "none";
document.getElementById('reservationstable').style.display = "block";
console.log(Reservations_db.find({ name: "Noé" }).fetch());
}
}

当我预订时，控制台中出现此错误：Uncaught Error: There is already a collection named "reservations"

我试着删除这行var Reservations_db = new Mongo.Collection('reservations');中的new，如下所示：

function readBooking() {
var Reservations_db = Mongo.Collection('reservations');
var name = document.getElementById("nom").value;
var formula = document.getElementById("formule").value;
var time = document.getElementById("time").value;
var length = document.getElementById("length").value;
Reservations_db.insert({ name: name, formula: formula, time: time, length: length });
}
function verifypsw() {
var Reservations_db = Mongo.Collection('reservations');
if (document.getElementById("psw").value == "massage") {
localStorage.setItem('admin', true);
document.getElementById('verifyid').style.display = "none";
document.getElementById('reservationstable').style.display = "block";
console.log(Reservations_db.find({ name: "Noé" }).fetch());
}
}

但随后出现了这个错误：Uncaught TypeError: this._maybeSetUpReplication is not a function

我该怎么办？

Answer 1

所有集合都只能定义一次，而不能在多个函数中定义。在自己的文件中声明集合，并导入该文件以插入、查找等。从长远来看，这也会让您更容易，因为您可以在单独的文件中创建数据模型。