Mongoose--Schema

http://mongoosejs.com/docs/guide.html#virtuals

每一个Schema映射一个数据库中的集合，限定了文档字段内容

var mongoose = require('mongoose');
  var Schema = mongoose.Schema;

  var blogSchema = new Schema({
    title:  String,
    author: String,
    body:   String,
    comments: [{ body: String, date: Date }],
    date: { type: Date, default: Date.now },
    hidden: Boolean,
    meta: {
      votes: Number,
      favs:  Number
    }
  });

 容许的Schema类型

String
Number
Date
Buffer
Boolean
Mixed
ObjectId
Array

Creating a model

经过Schema建立模型（mongoose.model(modelName, schema)）

var Blog = mongoose.model('Blog', blogSchema);

Instance methods

经过Schema实例方法methods能够为模型（documents）添加实例方法

// define a schema
  var animalSchema = new Schema({ name: String, type: String });

  // assign a function to the "methods" object of our animalSchema
  animalSchema.methods.findSimilarTypes = function(cb) {
    return this.model('Animal').find({ type: this.type }, cb);
  };

Statics

经过Schema实例方法statics能够为模型（documents）添加实例方法

animalSchema.statics.findByName = function(name, cb) {
    return this.find({ name: new RegExp(name, 'i') }, cb);
  };

  var Animal = mongoose.model('Animal', animalSchema);
  Animal.findByName('fido', function(err, animals) {
    console.log(animals);
  });

Valid options

http://mongoosejs.com/docs/guide.html#autoIndex

autoIndex
bufferCommands
capped             // 集合的封顶大小byte
collection         // 设置集合名称
emitIndexErrors    // 
id                 // 是否容许经过实体.id查询id
_id                // 是否自动建立_id字段
minimize           // 是否清除空字段，默认清除
read               // 设置schema level
shardKey           // 严格模式,传入model的字段不符则不能存入数据库
strict             // 
toJSON             // 
toObject           // 
typeKey            // 
validateBeforeSave // 保存字段验证
versionKey         // 设置versionKey,默认_v,可设为false
collation          // 
skipVersioning     // 
timestamps         // 设置了timestamps,会加入createdAt and updatedAt字段