mongodb实现自增的方法

前面操作看菜鸟教程

function getNextSequenceValue(sequenceName){

    var sequenceDocument = Counter.findOneAndUpdate(
           sequenceName,
          {$inc:{sequence_value:1}},
       ).exec(function(err,data){
           return data.sequence_value;
       });
 }

 但是findAndModify()方法要换成这个   findOneAndUpdate()

var mongoose = require('mongoose')

var CounterSchema = new mongoose.Schema({
    id:String,
    sequence_value:Number
})


module.exports = mongoose.model('Counter',CounterSchema)