node.js - assert.equal(3, result.result.n);类型错误 : Cannot read property 'n' of undefined

Question

我收到一条错误消息，提示 n 在第 47 行没有被拒绝，我已经使用了所有方法来解决它，但我无法解决它。它正在显示并且错误是 n 是 undefiend 我想知道为什么它会给我一个错误以及我为解决它所做的真正错误是什么

const MongoClient = require('mongodb').MongoClient;
const assert = require('assert');

// Connection URL
const url = 'mongodb://localhost:27017';

// Database Name
const dbName = 'fruitDB';

// Create a new MongoClient
const client = new MongoClient(url);

// Use connect method to connect to the Server
client.connect(function (err) {
    assert.equal(null, err);
    console.log("Connected successfully to server");

    const db = client.db(dbName);

    insertDocuments(db, function() {
        client.close();
      });
});

const insertDocuments = function(db, callback) {
    // Get the documents collection
    const collection = db.collection('fruits');
    // Insert some documents
    collection.insertMany([
        {
            name: "apple",
            score:5,
            review: "very very nice"
        },
        { 
            name: "orange",
            score: 7,
            review: "very very sour"
        },
        { 
            name: "Banana",
            score: 5,
            review: "best fruit"
        }
    ], function(err, result) {
      assert.equal(err, null);
      assert.equal(3, result.result.n);
      assert.equal(3, result.ops.length);
      console.log("Inserted 3 documents into the collection");
      callback(result);
    });
  }

请解决

Answer 1

由于result对象改变了，它不再包含result或ops字段

function (err, result)
{
    assert.equal(err, null);
    assert.equal(3, result.insertedCount);
    assert.equal(3, Object.keys(result.insertedIds).length);
    console.log("Inserted 3 documents into the collection");
    callback(result);
});

使用这些断言语句，它们应该适合您的情况。