mongoose Schema写法

var schema = new Schema({
  name:    String,　　　　//m.name = 'Statue of Liberty';
  binary:  Buffer,　　　　//m.binary = new Buffer(0);
  living:  Boolean,　　　　　　//m.living = false;
  updated: { type: Date, default: Date.now },　　//m.updated = new Date;
  age:     { type: Number, min: 18, max: 65 },　　//m.age = 125;
  mixed:   Schema.Types.Mixed,　　　　
　　　　　　　　//m.mixed = { any: { thing: 'i want' } };
　　　　　　　　　//m.markModified('mixed');//混合值通过该方法改变

  _someId: Schema.Types.ObjectId,　　//m._someId = new mongoose.Types.ObjectId;
  array:      [],　　//m.array.push(1);
  ofString:   [String],　　//m.ofString.push("strings!");
  ofNumber:   [Number],　　//m.ofNumber.unshift(1,2,3,4);
  ofDates:    [Date],　　//m.ofDates.addToSet(new Date);
  ofBuffer:   [Buffer],　　//m.ofBuffer.pop();
  ofBoolean:  [Boolean],　　
  ofMixed:    [Schema.Types.Mixed],　　
　　　　　　　　　　//m.ofMixed = [1, [], 'three', { four: 5 }];
  ofObjectId: [Schema.Types.ObjectId],　　
  nested: {
    stuff: { type: String, lowercase: true, trim: true }
  }　　//m.nested.stuff = 'good';
})

// example use

var Thing = mongoose.model('Thing', schema);

var m = new Thing;
m.name = 'Statue of Liberty';
m.age = 125;
m.updated = new Date;
m.binary = new Buffer(0);
m.living = false;
m.mixed = { any: { thing: 'i want' } };
m.markModified('mixed');
m._someId = new mongoose.Types.ObjectId;
m.array.push(1);
m.ofString.push("strings!");
m.ofNumber.unshift(1,2,3,4);
m.ofDates.addToSet(new Date);
m.ofBuffer.pop();
m.ofMixed = [1, [], 'three', { four: 5 }];
m.nested.stuff = 'good';
m.save(callback);

schema常用字段解析

var schema3 = new Schema({
  test: {
    type: String,
    lowercase: true, // 总是将test的值转化为小写
    uppercase: true, // 总是将test的值转化为大写
    required:true, //设定是否必填
    default:'star', //设定默认值
    index：true, //设定索引值
    unique：true, //索引值唯一
    sparse：true, //是否启用稀疏索引
    match：RegExp, //判断是否通过正则验证
    enum：Array， //判断test值是否包含于enmu对应的数组中
    min：Number， //判断对应值是否大于等于给定值
    max：Number， //判断对应值是否小于等于给定值
    trim:true //去除数据前后的空格
    capped:1024 //限定大小最大为1024字节
    validate：function，为此属性添加一个验证器函数，如demo1所示
    get：function，//为这个属性定义一个定制的getter Object.defineProperty()。如demo2所示
    set：function，//定义此属性的自定义设置Object.defineProperty()。如demo2所示
  }
});

demo1: validate

//初始化schema对象
var EmailTemplateSchema = new Schema({
fileName: {
        type: String,
        trim: true,
        default: '',
        validate: [validateLocalStrategyProperty, 'Please fill in your first name']
    }
});
//初始化对象时添加验证，验证传入的值是否合法
var validateLocalStrategyProperty = function (property) {
    return (!this.updated || property.length);
};

demo2: get/set

//将传入的值四舍五入后存储
var numberSchema = new Schema({
  integerOnly: {
    type: Number,
    get: v => Math.round(v),
    set: v => Math.round(v)，
    require:true
  }
});

参考 https://blog.csdn.net/momDIY/article/details/76285369?depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromBaidu-8&utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromBaidu-8

https://zhuanlan.zhihu.com/p/37283130