javascript - Mongoose JS路径默认生成id

Question

看看下面的架构:

var userSchema = new mongoose.Schema({
  fullName: {
    type: String,
    required: true,
    index: true
  },
  activationId: {
    type: mongoose.Schema.ObjectId
  }
});

userSchema.path('activationId').default(function() {
  return new mongoose.Schema.ObjectId.fromString('actvt');
});

这是关于“activationId”的，我想在创建用户后生成一个 ID(唯一代码，首选 objectID，因为它已经内置在 Mongoose 中)，所以如果我有以下代码:

var newUser = new User({
  fullName: 'Rick Richards'
});

newUser.save(function(error, data){
  console.log(data.activationId); // Should give the activationId
});

但是这个解决方案给我以下错误:

TypeError: undefined is not a function

Answer 1

您可以通过为 activationId 字段定义一个 default 属性来做到这一点，该字段是 ObjectId 构造函数:

var userSchema = new mongoose.Schema({
  fullName: {
    type: String,
    required: true,
    index: true
  },
  activationId: {
    type: mongoose.Schema.ObjectId
    default: mongoose.Types.ObjectId
  }
});