MongooseE11000错误：集合中出现重复键问题分析与解决

E11000 duplicate key error collection

const mOngoose= require('mongoose');



const Schema = mongoose.Schema;



// create Comment Schema & model

const UserSchema = new Schema({

    uid: {

        type : Number,

        index: {

            unique: true

        },

    },

    username: {

        type: String,

        required: [true, 'username field is required']

    },

    password: {

        type: String,

        required: [true, 'username field is required']

    },

    headImageUrl: {

        type: String,

    },

    created: {

        type: Date,

        default: Date.now

    },

    admin: {

        type: Boolean,

        default: false

    }





});



const User = mongoose.model('users', UserSchema);



module.exports = User;

router.post('/regeist', function (req, res, next) {

    bcrypt.hash(req.body.password, config.saltRounds).then(function (hashPassword) {

        req.body.password = hashPassword;

        User.create(req.body).then(function (echo) {

            res.json(echo);

        }).catch(next);

    });

});

WriteError({"code":11000,"index":0,"errmsg":"E11000 duplicate key error collection: video.users index: id_1 dup key: { : null }","op":{"username":"Fcho","password":"$2a$10$0SQsBRvqaRC8JB37dMWEMegGvScsce3YosG9QwoLeL1s0KcQq0HMW","uid":10001,"_id":"5985df9c05e88c2272d79745","admin":false,"created":"2017-08-05T15:09:16.908Z","__v":0}})