如何删除Mongoose中所有集合的所有文档

Question

将 Mongoose ODM 与 MongoDB 实例一起使用，如何删除数据库实例所有集合中的所有文档，而不必破坏集合本身或其索引？

对比：

await mongoose.connection.db.dropDatabase();

Deletes the given database, including all collections, documents, and indexes.

根据 Mongoose docs，这是不希望的。

Answer 1

遍历由 Connection.prototype.collections hash, and use Query.prototype.deleteMany() 的值给出的数据库中的所有集合，以删除集合中的每个文档。

deleteMany() query/operation 是异步的（它 returns 一个 Query promise-like object). In order to iteratively perform the operations for all collections, we can map each collection to a promise with an asynchronous callback in which we await the call, and use Promise.all 在所有查询都已解决时解决。

async function clearCollections() {
  const collections = mongoose.connection.collections;

  await Promise.all(Object.values(collections).map(async (collection) => {
      await collection.deleteMany({}); // an empty mongodb selector object ({}) must be passed as the filter argument
  }));
}

如何删除Mongoose中所有集合的所有文档

How to delete all documents of all collections in Mongoose

javascript

mongoose

mongodb

node.js

mongodb-query