mongoose - 定义 Mongoose 架构时应该使用 Schema.Types.ObjectId 还是 Schema.ObjectId

Question

这似乎是这样定义我的架构:

var PossessionSchema = new mongoose.Schema({
  thing: {type: mongoose.Schema.Types.ObjectId, ref:"Thing"}
});

或者这样:

var PossessionSchema = new mongoose.Schema({
  thing: {type: mongoose.Schema.ObjectId, ref:"Thing"}
});

两者都有效。我看到 Mongoose 指南使用 Schema.Types.ObjectId

http://mongoosejs.com/docs/schematypes.html

但我很困惑两者都有效。

架构应该使用哪一个？两者有什么区别？

Answer 1

没关系。两者完全相同。如果你实际上 console.log(mongoose.Schema); 你可以看到 mongoose.Schema.ObjectId 和 mongoose.Schema.Types.ObjectId > 指的是完全相同的事物。

{ [Function: Schema]
  reserved: { 
    _posts: 1,
    _pres: 1,
    validate: 1,
    toObject: 1,
    set: 1,
    schema: 1,
    save: 1,
    modelName: 1,
    get: 1,
    isNew: 1,
    isModified: 1,
    init: 1,
    errors: 1,
    db: 1,
    collection: 1,
    once: 1,
    on: 1,
    emit: 1 
  },
  interpretAsType: [Function],
  Types: { 
    String: { [Function: SchemaString] schemaName: 'String' },
    Number: { [Function: SchemaNumber] schemaName: 'Number' },
    Boolean: { [Function: SchemaBoolean] schemaName: 'Boolean', '$conditionalHandlers': [Object] },
    DocumentArray: { [Function: DocumentArray] schemaName: 'DocumentArray' },
     Embedded: [Function: Embedded],
    Array: { [Function: SchemaArray] schemaName: 'Array' },
    Buffer: { [Function: SchemaBuffer] schemaName: 'Buffer' },
    Date: { [Function: SchemaDate] schemaName: 'Date' },
    ObjectId: { [Function: ObjectId] schemaName: 'ObjectId' },
    Mixed: { [Function: Mixed] schemaName: 'Mixed' },
    Oid: { [Function: ObjectId] schemaName: 'ObjectId' },
    Object: { [Function: Mixed] schemaName: 'Mixed' },
    Bool: { [Function: SchemaBoolean] schemaName: 'Boolean', '$conditionalHandlers': [Object] } 
  },
  ObjectId: { [Function: ObjectId] schemaName: 'ObjectId' } 
}