E11000与MongoDB / Mongoose重复键错误

时间:2018-05-01 23:32:17

标签: node.js mongodb mongoose

我有一个用户模型架构,一个工作模型架构和一个批判模型架构。这些模式之间的关系是用户可以提交许多作品(如博客文章),并可以评论/评论(我们称之为评论)其他人的帖子(作品)。

因此,当用户提交批评时(将其视为评论),这是我的帖子。我通过id找到工作,然后创建一个新的批判模型对象,并将其传递给.create()mongoose函数。在我点击foundWork.critiques.push(createdCritique)行之前,一切似乎都很顺利。控制台日志错误说:

BulkWriteError:E11000重复键错误集合:zapper.critiques index:username_1 dup key:{:null}

显然,它说对象中有两个用户名密钥,它们之间存在冲突,但我对此并不熟悉,无法找到问题的根源并将其修复为猫鼬模型。模型如下。如果有人可以提供帮助,那将非常感激。

// post route for getting the review
router.post('/:id', isLoggedIn, function(req, res) {

    Work.findById(req.params.id, function(err, foundWork) {
        if (err) {
            console.log(err);
        } else {

            // create a new critique
            var newCritique = new Critique ({
                reviewerName: {
                    id: req.user._id,
                    username: req.user.username
                },
                work: {
                    id: foundWork._id,
                    title: foundWork.title
                },
                critique : req.body.critique,
                date: Date.now(),
                rating: 0
            });

            // save new critique to db
            Critique.create(newCritique, function(err, createdCritique) {
                if (err) {
                    console.log(err)
                } else {
                    console.log("Created critique is ");
                    console.log(createdCritique);

                    // push the new critique into array of critiques of the work
                    foundWork.critiques.push(createdCritique);
                    // save to db
                    foundWork.save();                                
                }
            });
        }
    });

用户模型:

var mongoose = require('mongoose');
var passportLocalMongoose = require('passport-local-mongoose');

var UserSchema = new mongoose.Schema({
    firstname: String,
    lastname: String,
    username: String,
    password: String,
    email: String,
    zip: String,
    bio: {
        type: String,
        default: ''
    },
    influences: {
        type: String,
        default: ''
    },
    favBooks: {
        type: String,
        default: ''
    },
    notWriting: {
        type: String,
        default: ''
    },
    favHero: {
        type: String,
        default: ''
    },
    favVillain: {
        type: String,
        default: ''
    },
    works: [
        {
            type: mongoose.Schema.Types.ObjectId,
            ref: 'Work'
        }
    ],
    critiques: [
        {
            type: mongoose.Schema.Types.ObjectId,
            ref: 'Critique'
        }
    ],
    friends: [
        {
            friendId: String,
            friendName  : String,
            friendPic: String
        }
    ],
    friendRequests: [
        {
            sendingFriendId: String,
            sendingFriendName  : String,
            sendingFriendPic: String
        }
    ],
    createdDate: {
        type: Date,
        default: Date.now
    },
    lastLogin: {
        type: Date,
        default: Date.now
    }
});

UserSchema.plugin(passportLocalMongoose);
module.exports = mongoose.model("User", UserSchema);

工作模式:

var mongoose = require('mongoose');

var WorkSchema = new mongoose.Schema({
    title: String,
    genre: String,
    workType: String,
    length: Number,
    ageRange: String,
    author: {
        id: {
            type: mongoose.Schema.Types.ObjectId,
            ref: "User"
        },
        username: String
    },
    manuscriptText: String,
    critiques: [ 
        {
            id: {
                type: mongoose.Schema.Types.ObjectId,
                ref: "Critique"
            }
        }
    ],
    ratingNumber: [Number],
    ratingSum: {
        type: Number,
        default: 0
    },
    date: {
        type: Date,
        default: Date.now
    },
    isPublic: {
        type: Boolean,
        default: true
    }
});


module.exports = mongoose.model("Work", WorkSchema);

批判模型:

var mongoose = require('mongoose');
var passportLocalMongoose = require('passport-local-mongoose');

var CritiqueSchema = new mongoose.Schema({
    reviewerName: {
        id: {
            type: mongoose.Schema.Types.ObjectId,
            ref: "User"
        },
        username: String
    },
    work: {
        id: {
            type: mongoose.Schema.Types.ObjectId,
            ref: "Work"
        },
        title: String
    },
    critique: String,
    date: {
        type: Date,
        default: Date.now
    },
    rating: [Number]
});


CritiqueSchema.plugin(passportLocalMongoose);
module.exports = mongoose.model("Critique", CritiqueSchema);

1 个答案:

答案 0 :(得分:2)

在MongoDB中创建唯一索引时,默认行为是它也将索引空值。

这意味着如果您的集合中有一个用户名为null的文档,则无法添加另一个用户名为null的文档。

您需要的是a sparse index,它仅对实际值进行索引(并忽略该字段为null的文档)。

Check this link它显示了如何在mongoose中创建稀疏索引与“普通”索引(index:true,vs spare:true)。大多数情况下,您需要稀疏索引。