mongodb - mongoose 事务中创建集合的正确方法

Question

如果尚未创建集合，如何在 mongoose 事务期间自动创建集合？

我知道 mongoose 限制限制用户在打开的事务 session 期间创建(或删除)mongoose 集合。

另外，我找到了 3 种可能的解决方案来解决这个问题:
1. autoCreate option
2. Model.init() method
3. Model.createCollection() method

使用哪一个？不丢失索引等

应用程序模型.ts

import { model, Schema } from 'mongoose';

const UserSchema = new Schema<UserDocument>({
  name: {
    type: Schema.Types.String,
    required: true,
  }
}); // { autoCreate: true } <-- ???

export const UserModel = model<UserDocument>('User', UserSchema);

应用.ts

import { startSession } from 'mongoose';

import { UserModel } from './app.models.ts'; 


async function createUser() { 
  // await UserModel.createCollection(); ??
  // or 
  // await UserModel.init(); ??

  const session = await startSession();
  sesssion.startTransaction();

  try {
    const [user] = await UserModel.create([{ name: 'John' }], { session });

    await session.commitTransaction();

    return user;
  } catch (error) {
    await session.abortTransaction();
  } finally {
    session.endSession()
  }
}

foo();

Answer 1

If a collection does not exist, MongoDB creates the collection when you first store data for that collection. You can also explicitly create a collection with various options, such as setting the maximum size or the documentation validation rules.

无论如何，mongoose 负责索引、集合等...您只需要定义集合名称:https://mongoosejs.com/docs/guide.html#collection

const UserSchema = new Schema<UserDocument>({
  name: {
    type: Schema.Types.String,
    required: true,
  }
}, {collection: 'users'});

关于事务和集合创建的答案 - https://github.com/Automattic/mongoose/issues/6699

其实我用的是https://www.npmjs.com/package/db-migrate在启动应用程序之前创建集合和索引的包。