node.js （节点：63208）弃用警告：不推荐使用 collection.ensureIndex。改用 createIndexes
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(node:63208) DeprecationWarning: collection.ensureIndex is deprecated. Use createIndexes instead
提问by aditya kumar
Where is this error coming from? I am not using ensureIndexor createIndexin my Nodejs application anywhere. I am using yarn package manager.
这个错误来自哪里？我没有在任何地方使用ensureIndex或createIndex在我的 Nodejs 应用程序中。我正在使用纱线包管理器。
Here is my code in index.js
这是我的代码 index.js
import express from 'express';
import path from 'path';
import bodyParser from 'body-parser';
import mongoose from 'mongoose';
import Promise from 'bluebird';
dotenv.config();
mongoose.Promise = Promise;
mongoose.connect('mongodb://localhost:27017/bookworm', { useNewUrlParser: true });
const app = express();
回答by
The issue is that mongoosestill uses collection.ensureIndex and should be updated by them in the near future. To get rid of the message you can downgrade by using version 5.2.8 in your package.json (and delete any caches, last resort is to uninstall it the install it with npm install [email protected]):
问题是猫鼬仍然使用 collection.ensureIndex 并且应该在不久的将来由他们更新。要摆脱该消息，您可以在 package.json 中使用版本 5.2.8 降级（并删除任何缓存，最后的方法是卸载它并使用npm install [email protected]安装它）：
"mongoose": "^5.2.8"
“猫鼬”：“^5.2.8”
EDIT:As of this edit, Mongoose is now at v5.4.13. Per their docs, these are the fixes for the deprecation warnings...
编辑：截至本次编辑，Mongoose 现在是 v5.4.13。根据他们的文档，这些是对弃用警告的修复......
mongoose.set('useNewUrlParser', true);
mongoose.set('useFindAndModify', false);
mongoose.set('useCreateIndex', true);
Replace update() with updateOne(), updateMany(), or replaceOne()
Replace remove() with deleteOne() or deleteMany().
Replace count() with countDocuments(), unless you want to count how many documents are in the whole collection (no filter). In the latter case, use estimatedDocumentCount().
将 update() 替换为 updateOne()、updateMany() 或 replaceOne()
用 deleteOne() 或 deleteMany() 替换 remove()。
将 count() 替换为 countDocuments()，除非您想计算整个集合中有多少文档（无过滤器）。在后一种情况下，使用estimatedDocumentCount()。
