WebMongoose provides a straight-forward, schema-based solution to model your application data. It includes built-in type casting, validation, query building, business logic hooks and … Webconst mongoose = require('mongoose'); const carSchema = new mongoose.Schema( { driver: mongoose.ObjectId }); ObjectId is a class, and ObjectIds are objects. However, they are often represented as strings. When you convert an ObjectId to a string using toString (), you get a 24-character hexadecimal string:
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Web25 jun. 2024 · 有效的配置项. 详细使用根据链接查看官方文档. autoIndex 自动创建索引,在应用程序启动时,Mongoose会ensureIndex为您声明的每个索引发送一个命令Schema。在Mongoose v3中,background默认情况下会创建索引。如果要禁用自动创建功能并在创建索引时手动处理,请将您Schema的autoIndex选项设置为false并在模型上 ... WebWhen your application starts up, Mongoose automatically calls createIndex for each defined index in your schema. Mongoose will call createIndex for each index sequentially, and emit an 'index' event on the model when all the createIndex … Web这是我参与8月更文挑战的第31天,活动详情查看:8月更文挑战 Mongoose 的唯一索引 unique 选项都作用是,对于给定的路径,每个文档必须具有唯一的值。 例如,下面是如何告诉 Mongoose 用户的 email 必须是唯一的。. const mongoose = require ('mongoose') const userSchema = new mongoose. Schema ({ email: { type: String, unique: true ... difference between fantasy and myth