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存在多个匹配项。不幸的是，它只是更新每个文档中具有匹配项的第一个子文档。

以下是代码：

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，'雪茄'文档中的第二个'烟草'记录仍然有PartNbr为4而不是5.是否有人知道如何更新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。

它有https://jira.mongodb.org/browse/SERVER-1243

的当前请求

Mongo子文档数组中的多子文档更新

1 个答案: