mongoose.model创建集合

1. module.exports = mongoose.model(‘DepotLoc’, schema);

mongoose是通过model来创建mongodb中对应的集合（collection）

DepotLoc不会出现在数据库中，在数据库中会将集合描述小写，并且如果这个集合名尾巴没有s，数据库内部处理，会形成depotLocs集合
代码如下：

var mongoose = require('mongoose');var Device = require('./device');var uuid = require('uuid');var Schema = mongoose.Schema;var now = function () {  return new Date();};// Exportsvar schema = new Schema({  group: { type: String, required: true, index: true },  location: { type: String, required: true, index: true },  depotid: { type: String, required: true, index: true },  deviceid: { type: Schema.Types.ObjectId, ref: "Device" },  prince: { type: Number },  volume: { type: Number },  img: { type: String },  isvacant: { type: Boolean },  apikey: { type: String, unique: true, default: uuid.v4 },  createdAt: { type: Date, index: true, default: now }});schema.static('', function(){});module.exports = mongoose.model('DepotLoc', schema);

2. 使用robo3T可视化本地数据库，你可以看到数据库结构，

确实新建了一个depotLocs集合