node.js - Mongo 子文档数组中的多子文档更新

Question

我正在尝试更新 Mongo 集合中的多个子文档，其中同一集合中可能有多个匹配项。不幸的是，它只会更新每个文档中具有匹配项的第一个子文档。

代码如下:

var mongoose = require('mongoose');

mongoose.connect('mongodb://127.0.0.1/touchbits');

var PartsSchema = new mongoose.Schema({
        type: String
        , partNbr: Number
    });

var ProductSchema = new mongoose.Schema({
        sku: { type: String, unique: true }
        , parts: [PartsSchema]
    });

Product = mongoose.model('Product', ProductSchema);

var cigars = new Product({
        sku: 'cigar123',
        parts: [{type: 'tobacco', partNbr: 4}, 
                {type: 'rolling paper', partNbr: 8}, 
                {type: 'tobacco', partNbr: 4}]
    });
var cigarillo = new Product({
        sku: 'cigarillo456',
        parts: [{type: 'tobacco', partNbr: 4}, 
                {type: 'crush paper', partNbr: 12}]
    });

cigars.save(function(err, product1) {
        if(err) { console.log("err1: " + err); return err; }
        console.log("saved: " + product1);
        cigarillo.save(function(err, product2) {
                if(err){ console.log("err2: " + err); return err; }
                console.log("saved: " + product2);
                Product.update({ "parts.type": 'tobacco' },
                               { $set: { "parts.$.partNbr": 5 } },
                               { multi: true },
                               function(err, numAffected) {
                                   if (err) { console.log("err3: " + err); return err; }
                                   console.log("records updated: " + numAffected);
                                   Product.find({}, function(err, docs) {
                                           if (err) { console.log("err4: " + err); return err; }
                                           console.log("updated data: " + docs);
                                           Product.remove(function(err) {
                                                   if (err) { console.log("err5: " + err); return err; }
                                                   process.exit();
                                               });
                                       });
                               });
            });
    });

然后当我运行它时，我得到以下结果:

saved: { __v: 0,
  sku: 'cigar123',
  _id: 51c9229b7fe80ef71e000002,
  parts: 
   [ { type: 'tobacco', partNbr: 4, _id: 51c9229b7fe80ef71e000005 },
     { type: 'rolling paper',
       partNbr: 8,
       _id: 51c9229b7fe80ef71e000004 },
     { type: 'tobacco', partNbr: 4, _id: 51c9229b7fe80ef71e000003 } ] }
saved: { __v: 0,
  sku: 'cigarillo456',
  _id: 51c9229b7fe80ef71e000006,
  parts: 
   [ { type: 'tobacco', partNbr: 4, _id: 51c9229b7fe80ef71e000008 },
     { type: 'crush paper',
       partNbr: 12,
       _id: 51c9229b7fe80ef71e000007 } ] }
records updated: 2
updated data: { sku: 'cigar123',
  _id: 51c9229b7fe80ef71e000002,
  __v: 0,
  parts: 
   [ { type: 'tobacco', partNbr: 5, _id: 51c9229b7fe80ef71e000005 },
     { type: 'rolling paper',
       partNbr: 8,
       _id: 51c9229b7fe80ef71e000004 },
     { type: 'tobacco', partNbr: 4, _id: 51c9229b7fe80ef71e000003 } ] },{ sku: 'cigarillo456',
  _id: 51c9229b7fe80ef71e000006,
  __v: 0,
  parts: 
   [ { type: 'tobacco', partNbr: 5, _id: 51c9229b7fe80ef71e000008 },
     { type: 'crush paper',
       partNbr: 12,
       _id: 51c9229b7fe80ef71e000007 } ] }

请注意，“cigars”文档中的第二个“tobacco”记录的 PartNbr 仍然是 4 而不是 5。有谁知道如何更改更新以更新数组中与查询条件匹配的所有子文档？

Answer 1

在一个请求中更新多个子文档的功能尚未实现。

它在 https://jira.mongodb.org/browse/SERVER-1243 有一个当前请求