Node.js - 用Mongoose创建关系

Question

我有2个架构,Custphone和Subdomain.Custphone belongs_to一个Subdomain和Subdomain has_many Custphones.

问题在于使用Mongoose创建关系.我的目标是:custphone.subdomain并获取Custphone所属的子域.

我的模式中有这个:

SubdomainSchema = new Schema
    name : String

CustphoneSchema = new Schema
    phone : String
    subdomain  : [SubdomainSchema]

当我打印Custphone结果时,我得到了这个:

{ _id: 4e9bc59b01c642bf4a00002d,
  subdomain: [] }

当Custphone结果出现{"$oid": "4e9b532b01c642bf4a000003"}在MongoDB中时.

我想做custphone.subdomain并获得custphone的子域对象.

Answer 1

听起来你正在寻找在Mongoose中尝试新的填充功能.

使用上面的示例:

var Schema = mongoose.Schema,
    ObjectId = Schema.ObjectId;

SubdomainSchema = new Schema
    name : String

CustphoneSchema = new Schema
    phone : String
    subdomain  : { type: ObjectId, ref: 'SubdomainSchema' }

该subdomain字段将使用'_id'进行更新,例如:

var newSubdomain = new SubdomainSchema({name: 'Example Domain'})
newSubdomain.save()

var newCustphone = new CustphoneSchema({phone: '123-456-7890', subdomain: newSubdomain._id})
newCustphone.save()

要从subdomain字段中实际获取数据,您将不得不使用稍微复杂的查询语法:

CustphoneSchema.findOne({}).populate('subdomain').exec(function(err, custPhone) { 
// Your callback code where you can access subdomain directly through custPhone.subdomain.name 
})