node.js - Mongoose:类型错误:doc.validate 不是函数

Question

场景

我有一个 Mongoose 模型架构，如下所示:

var TerminalBalanceSchema = new mongoose.Schema({
    currentBalances: [{
        terminalID: {
            type: String,
            // required: '{path} is required'
        },
        balance: {
            terminal: {
                type: Number,
                required: '{path} is required'
            },
            calculated: {
                type: Number,
                required: '{path} is required'
            }
        },
        lastInquiryDate: Date
    }]
});

其中currentBalances是一个对象数组。

基于上述架构的 mongoose 模型 TerminalBalance 的集合始终包含一个单个对象，其中只有 currentBalances 数组中的项目可能会更改。

问题

每当我执行某些操作来替换文档数组currentBalances中的对象并最终保存同一文档时，我都会收到以下错误:

x:\node\mynps-tcp-server\node_modules\mongoose\lib\schema\documentarray.js:104
  doc.validate({ __noPromise: true }, function(err) {
      ^

TypeError: doc.validate is not a function

at x:\node\mynps-tcp-server\node_modules\mongoose\lib\schema\documentarray.js:104:11
at DocumentArray.SchemaType.doValidate (x:\node\mynps-tcp-server\node_modules\mongoose\lib\schematype.js:654:22)
at DocumentArray.doValidate (x:\node\mynps-tcp-server\node_modules\mongoose\lib\schema\documentarray.js:77:35)
at x:\node\mynps-tcp-server\node_modules\mongoose\lib\document.js:1171:9
at nextTickCallbackWith0Args (node.js:452:9)
at process._tickCallback (node.js:381:13)

请注意，要替换对象，我会循环遍历 currentBalances 数组，如果该对象与我要查找的对象相同，则会替换它:

for (var i = 0; i < terminalBalance.currentBalances.length; i++) {
     if(terminalBalance.currentBalances[i].terminalID === response.data.terminalID){
         terminalBalance.currentBalances[i] = balance;
         terminalBalance.save(function (err) {
             console.log('err', err); // this `err` is never thrown, that is the above error is thrown before reaching here 
         });
         break;
      } else { ...

Mongoose version: 4.4.19

Answer 1

使用 MongooseArray.splice 解决了我的问题(这是内置 JS Array.prototype.splice() 的包装器)在数组上，而不是直接将索引处的对象分配给 currentBalances 数组。

...
if(terminalBalance.currentBalances[i].terminalID === response.data.terminalID){
     terminalBalance.currentBalances[i].splice(i, 1, balance);  //<=== here
     terminalBalance.save(function (err) {
         console.log('err', err);
     });
     break;
...