如果你是前端开发者，特别是跟 Node.js 相关的开发者，那么你一定会经常使用 MongoDB 做数据库的存储。在 MongoDB 的使用中，你是否曾经遇到过这些问题：

数据库操作代码冗余、重复
Model 层的代码难于维护
非常规的操作难以实现

如果你遇到这些问题，那么你可以尝试使用 npm 包 mongo-model-statics 来解决这些问题。

mongo-model-statics 是什么？

mongo-model-statics 是一个基于 Mongoose 的 npm 包，为 Mongoose Model 增加了一些通用的静态方法，使得你可以更轻松的操作 MongoDB。

这些静态方法包括：

findOneOrCreate：尝试查询文档，如果不存在则创建。
countBy：类似于 SQL 的 GROUP BY 聚合操作。
random：随机查询一个文档。
updateOrCreate：尝试更新文档，如果不存在则创建。
upsertMany：批量 upsert 操作，更新匹配到的文档，如果不存在则创建。

怎么使用 mongo-model-statics？

在你使用 mongo-model-statics 之前，你需要先安装 mongoose 和 mongo-model-statics：

npm install mongoose mongo-model-statics

在使用 mongo-model-statics 之前，你需要先在你的 MongoDB 数据库中创建一个数据库和文档（在这里我们以一个用户数据结构为例）：

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英文原文

A Guide to Using the npm Package mongo-model-statics for Frontend Developers

If you're a frontend developer, especially one who works with Node.js, you've probably worked with MongoDB for database storage before. Have you ever encountered the following issues while working with MongoDB:

Redundant and repetitive database operation code
Difficult-to-maintain Model-level code
Difficult to implement non-standard operations

If you've encountered these issues, then you might want to try out the npm package mongo-model-statics to help solve these issues.

What is mongo-model-statics?

mongo-model-statics is an npm package based on Mongoose. It provides a set of common static methods for Mongoose Models, making it easier for you to work with MongoDB.

These static methods include:

findOneOrCreate: Attempts to find a document and creates it if it does not exist.
countBy: Performs a GROUP BY aggregate operation similar to SQL.
random: Returns a random document.
updateOrCreate: Attempts to update a document and creates it if it does not exist.
upsertMany: Batch upsert operation. Updates matching documents or creates them if they don't exist.

How to Use mongo-model-statics

Before you use mongo-model-statics, you need to install mongoose and mongo-model-statics:

npm install mongoose mongo-model-statics

To use mongo-model-statics, you first need to create a database and document in your MongoDB database (here we'll use a user data structure as an example):

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Then, you need to load the mongo-model-statics plugin on your User Model:

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Conclusion

Using mongo-model-statics can help frontend developers work more efficiently when working with MongoDB. This guide has provided a detailed tutorial on how to use this npm package and its advantages. If you frequently work with MongoDB and want to streamline your database operations, give mongo-model-statics a try.

来源：JavaScript中文网，转载请注明来源 https://www.javascriptcn.com/post/60055ea181e8991b448dbf60

npm 包 mongo-model-statics 使用教程